annotate src/conv.rs @ 74:c7c596e6388f

Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT) In previous versions of Conversation, you could send messages and then return messages of the wrong type or in the wrong order or whatever. The receiver would then have to make sure that there were the right number of messages and that each message was the right type. That's annoying. This change makes the `Message` enum a two-way channel, where the asker puts their question into it, and then the answerer (the conversation) puts the answer in and returns control to the asker. The asker then only has to pull the Answer of the type they wanted out of the message.
author Paul Fisher <paul@pfish.zone>
date Fri, 06 Jun 2025 22:21:17 -0400
parents ac6881304c78
children e58d24849e82
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //! The PAM conversation and associated Stuff.
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2
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3 // Temporarily allowed until we get the actual conversation functions hooked up.
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4 #![allow(dead_code)]
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5
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6 use crate::constants::Result;
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7 use crate::ErrorCode;
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8 use secure_string::SecureString;
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9 use std::cell::Cell;
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11 /// The types of message and request that can be sent to a user.
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12 ///
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13 /// The data within each enum value is the prompt (or other information)
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14 /// that will be presented to the user.
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15 pub enum Message<'a> {
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16 MaskedPrompt(&'a MaskedPrompt<'a>),
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17 Prompt(&'a Prompt<'a>),
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18 RadioPrompt(&'a RadioPrompt<'a>),
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19 BinaryPrompt(&'a BinaryPrompt<'a>),
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20 InfoMsg(&'a InfoMsg<'a>),
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21 ErrorMsg(&'a ErrorMsg<'a>),
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22 }
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23
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24 /// A question-and-answer pair that can be communicated in a [`Conversation`].
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25 ///
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26 /// The asking side creates a `QAndA`, then converts it to a [`Message`]
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27 /// and sends it via a [`Conversation`]. The Conversation then retrieves
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28 /// the answer to the question (if needed) and sets the response.
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29 /// Once control returns to the asker, the asker gets the answer from this
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30 /// `QAndA` and uses it however it wants.
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31 ///
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32 /// For a more detailed explanation of how this works,
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33 /// see [`Conversation::communicate`].
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34 pub trait QAndA<'a> {
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35 /// The type of the content of the question.
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36 type Question: Copy;
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37 /// The type of the answer to the question.
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38 type Answer;
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39
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40 /// Converts this Q-and-A pair into a [`Message`] for the [`Conversation`].
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41 fn message(&self) -> Message;
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42
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43 /// The contents of the question being asked.
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44 ///
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45 /// For instance, this might say `"Username:"` to prompt the user
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46 /// for their name.
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47 fn question(&self) -> Self::Question;
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48
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49 /// Sets the answer to the question.
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50 ///
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51 /// The [`Conversation`] implementation calls this to set the answer.
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52 /// The conversation should *always call this function*, even for messages
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53 /// that don't have "an answer" (like error or info messages).
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54 fn set_answer(&self, answer: Result<Self::Answer>);
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55
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56 /// Gets the answer to the question.
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57 fn answer(self) -> Result<Self::Answer>;
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58 }
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59
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60 macro_rules! q_and_a {
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61 ($name:ident<'a, Q=$qt:ty, A=$at:ty>, $($doc:literal)*) => {
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62 $(
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63 #[doc = $doc]
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64 )*
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65 pub struct $name<'a> {
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66 q: $qt,
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67 a: Cell<Result<$at>>,
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68 }
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70 impl<'a> QAndA<'a> for $name<'a> {
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71 type Question = $qt;
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72 type Answer = $at;
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73
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74 fn question(&self) -> Self::Question {
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75 self.q
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76 }
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77
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78 fn set_answer(&self, answer: Result<Self::Answer>) {
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79 self.a.set(answer)
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80 }
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81
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82 fn answer(self) -> Result<Self::Answer> {
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83 self.a.into_inner()
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84 }
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85
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86 fn message(&self) -> Message {
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87 Message::$name(self)
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88 }
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89 }
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90 };
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91 }
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92
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93 macro_rules! ask {
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94 ($t:ident) => {
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95 impl<'a> $t<'a> {
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96 #[doc = concat!("Creates a `", stringify!($t), "` to be sent to the user.")]
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97 fn ask(question: &'a str) -> Self {
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98 Self {
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99 q: question,
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100 a: Cell::new(Err(ErrorCode::ConversationError)),
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101 }
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102 }
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103 }
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104 };
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105 }
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106
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107 q_and_a!(
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108 MaskedPrompt<'a, Q=&'a str, A=SecureString>,
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109 "Asks the user for data and does not echo it back while being entered."
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110 ""
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111 "In other words, a password entry prompt."
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112 );
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113 ask!(MaskedPrompt);
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114
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115 q_and_a!(
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116 Prompt<'a, Q=&'a str, A=String>,
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117 "Asks the user for data."
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118 ""
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119 "This is the normal \"ask a person a question\" prompt."
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120 "When the user types, their input will be shown to them."
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121 "It can be used for things like usernames."
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122 );
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123 ask!(Prompt);
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124
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125 q_and_a!(
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126 RadioPrompt<'a, Q=&'a str, A=String>,
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127 "Asks the user for \"radio button\"–style data. (Linux-PAM extension)"
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128 ""
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129 "This message type is theoretically useful for \"yes/no/maybe\""
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130 "questions, but nowhere in the documentation is it specified"
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131 "what the format of the answer will be, or how this should be shown."
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132 );
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133 ask!(RadioPrompt);
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134
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135 q_and_a!(
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136 BinaryPrompt<'a, Q=BinaryQuestion<'a>, A=BinaryData>,
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137 "Asks for binary data. (Linux-PAM extension)"
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138 ""
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139 "This sends a binary message to the client application."
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140 "It can be used to communicate with non-human logins,"
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141 "or to enable things like security keys."
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142 ""
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143 "The `data_type` tag is a value that is simply passed through"
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144 "to the application. PAM does not define any meaning for it."
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145 );
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146 impl<'a> BinaryPrompt<'a> {
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147 /// Creates a prompt for the given binary data.
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148 ///
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149 /// The `data_type` is a tag you can use for communication between
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150 /// the module and the application. Its meaning is undefined by PAM.
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151 fn ask(data: &'a [u8], data_type: u8) -> Self {
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152 Self {
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153 q: BinaryQuestion { data, data_type },
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154 a: Cell::new(Err(ErrorCode::ConversationError)),
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155 }
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156 }
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157 }
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158
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159 /// The contents of a question requesting binary data.
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160 ///
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161 /// A borrowed version of [`BinaryData`].
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162 #[derive(Copy, Clone, Debug)]
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163 pub struct BinaryQuestion<'a> {
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164 data: &'a [u8],
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165 data_type: u8,
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166 }
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167
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168 impl BinaryQuestion<'_> {
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169 /// Gets the data of this question.
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170 pub fn data(&self) -> &[u8] {
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171 self.data
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172 }
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173
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174 /// Gets the "type" of this data.
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175 pub fn data_type(&self) -> u8 {
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176 self.data_type
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177 }
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178 }
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179
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180 /// Owned binary data.
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181 ///
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182 /// For borrowed data, see [`BinaryQuestion`].
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183 /// You can take ownership of the stored data with `.into::<Vec<u8>>()`.
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184 #[derive(Debug, PartialEq)]
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185 pub struct BinaryData {
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186 data: Vec<u8>,
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187 data_type: u8,
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188 }
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189
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190 impl BinaryData {
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191 /// Creates a `BinaryData` with the given contents and type.
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192 pub fn new(data: Vec<u8>, data_type: u8) -> Self {
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193 Self { data, data_type }
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194 }
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195 /// A borrowed view of the data here.
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196 pub fn data(&self) -> &[u8] {
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197 &self.data
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198 }
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199 /// The type of the data stored in this.
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200 pub fn data_type(&self) -> u8 {
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201 self.data_type
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202 }
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203 }
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204
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205 impl From<BinaryData> for Vec<u8> {
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206 /// Takes ownership of the data stored herein.
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207 fn from(value: BinaryData) -> Self {
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208 value.data
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209 }
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210 }
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211
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212 q_and_a!(
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213 InfoMsg<'a, Q = &'a str, A = ()>,
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214 "A message containing information to be passed to the user."
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215 ""
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216 "While this does not have an answer, [`Conversation`] implementations"
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217 "should still call [`set_answer`][`QAndA::set_answer`] to verify that"
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218 "the message has been displayed (or actively discarded)."
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219 );
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220 impl<'a> InfoMsg<'a> {
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221 /// Creates an informational message to send to the user.
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222 fn new(message: &'a str) -> Self {
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223 Self {
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224 q: message,
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225 a: Cell::new(Err(ErrorCode::ConversationError)),
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226 }
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227 }
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228 }
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229
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230 q_and_a!(
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231 ErrorMsg<'a, Q = &'a str, A = ()>,
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232 "An error message to be passed to the user."
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233 ""
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234 "While this does not have an answer, [`Conversation`] implementations"
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235 "should still call [`set_answer`][`QAndA::set_answer`] to verify that"
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236 "the message has been displayed (or actively discarded)."
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237
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238 );
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239 impl<'a> ErrorMsg<'a> {
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240 /// Creates an error message to send to the user.
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241 fn new(message: &'a str) -> Self {
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242 Self {
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243 q: message,
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244 a: Cell::new(Err(ErrorCode::ConversationError)),
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245 }
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246 }
73
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247 }
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248
70
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249 /// A channel for PAM modules to request information from the user.
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250 ///
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251 /// This trait is used by both applications and PAM modules:
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252 ///
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253 /// - Applications implement Conversation and provide a user interface
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254 /// to allow the user to respond to PAM questions.
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255 /// - Modules call a Conversation implementation to request information
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256 /// or send information to the user.
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257 pub trait Conversation {
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258 /// Sends messages to the user.
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259 ///
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260 /// The returned Vec of messages always contains exactly as many entries
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261 /// as there were messages in the request; one corresponding to each.
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262 ///
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263 /// TODO: write detailed documentation about how to use this.
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264 fn communicate(&mut self, messages: &[Message]);
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265 }
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266
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267 /// Turns a simple function into a [`Conversation`].
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268 ///
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269 /// This can be used to wrap a free-floating function for use as a
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270 /// Conversation:
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271 ///
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272 /// ```
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273 /// use nonstick::conv::{Conversation, Message, conversation_func};
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274 /// mod some_library {
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275 /// # use nonstick::Conversation;
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276 /// pub fn get_auth_data(conv: &mut impl Conversation) { /* ... */ }
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277 /// }
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278 ///
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279 /// fn my_terminal_prompt(messages: &[Message]) {
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280 /// // ...
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281 /// # todo!()
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282 /// }
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283 ///
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284 /// fn main() {
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285 /// some_library::get_auth_data(&mut conversation_func(my_terminal_prompt));
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286 /// }
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287 /// ```
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288 pub fn conversation_func(func: impl FnMut(&[Message])) -> impl Conversation {
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289 Convo(func)
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290 }
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291
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292 struct Convo<C: FnMut(&[Message])>(C);
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293
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294 impl<C: FnMut(&[Message])> Conversation for Convo<C> {
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295 fn communicate(&mut self, messages: &[Message]) {
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296 self.0(messages)
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297 }
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298 }
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299
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300 /// A conversation trait for asking or answering one question at a time.
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301 ///
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302 /// An implementation of this is provided for any [`Conversation`],
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303 /// or a PAM application can implement this trait and handle messages
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304 /// one at a time.
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305 ///
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306 /// For example, to use a `Conversation` as a `SimpleConversation`:
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307 ///
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308 /// ```
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309 /// # use nonstick::{Conversation, Result};
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310 /// # use secure_string::SecureString;
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311 /// // Bring this trait into scope to get `masked_prompt`, among others.
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312 /// use nonstick::SimpleConversation;
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313 ///
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314 /// fn ask_for_token(convo: &mut impl Conversation) -> Result<SecureString> {
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315 /// convo.masked_prompt("enter your one-time token")
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316 /// }
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317 /// ```
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318 ///
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319 /// or to use a `SimpleConversation` as a `Conversation`:
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320 ///
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321 /// ```
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322 /// use secure_string::SecureString;
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323 /// use nonstick::{Conversation, SimpleConversation};
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324 /// # use nonstick::{BinaryData, Result};
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325 /// mod some_library {
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326 /// # use nonstick::Conversation;
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327 /// pub fn get_auth_data(conv: &mut impl Conversation) { /* ... */ }
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328 /// }
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329 ///
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330 /// struct MySimpleConvo { /* ... */ }
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331 /// # impl MySimpleConvo { fn new() -> Self { Self{} } }
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332 ///
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333 /// impl SimpleConversation for MySimpleConvo {
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334 /// // ...
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335 /// # fn prompt(&mut self, request: &str) -> Result<String> {
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336 /// # todo!()
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337 /// # }
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338 /// #
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339 /// # fn masked_prompt(&mut self, request: &str) -> Result<SecureString> {
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340 /// # todo!()
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341 /// # }
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342 /// #
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343 /// # fn radio_prompt(&mut self, request: &str) -> Result<String> {
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344 /// # todo!()
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345 /// # }
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346 /// #
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347 /// # fn error_msg(&mut self, message: &str) {
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348 /// # todo!()
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349 /// # }
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350 /// #
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351 /// # fn info_msg(&mut self, message: &str) {
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352 /// # todo!()
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353 /// # }
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354 /// #
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355 /// # fn binary_prompt(&mut self, data: &[u8], data_type: u8) -> Result<BinaryData> {
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356 /// # todo!()
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357 /// # }
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358 /// }
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359 ///
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360 /// fn main() {
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361 /// let mut simple = MySimpleConvo::new();
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362 /// some_library::get_auth_data(&mut simple.as_conversation())
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363 /// }
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364 /// ```
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365 pub trait SimpleConversation {
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366 /// Lets you use this simple conversation as a full [Conversation].
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367 ///
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368 /// The wrapper takes each message received in [`Conversation::communicate`]
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369 /// and passes them one-by-one to the appropriate method,
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370 /// then collects responses to return.
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371 fn as_conversation(&mut self) -> Demux<Self>
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372 where
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373 Self: Sized,
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374 {
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375 Demux(self)
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376 }
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377 /// Prompts the user for something.
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378 fn prompt(&mut self, request: &str) -> Result<String>;
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379 /// Prompts the user for something, but hides what the user types.
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380 fn masked_prompt(&mut self, request: &str) -> Result<SecureString>;
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381 /// Prompts the user for a yes/no/maybe conditional (a Linux-PAM extension).
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382 ///
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383 /// PAM documentation doesn't define the format of the response.
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384 fn radio_prompt(&mut self, request: &str) -> Result<String>;
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385 /// Alerts the user to an error.
74
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386 fn error_msg(&mut self, message: &str);
73
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387 /// Sends an informational message to the user.
74
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388 fn info_msg(&mut self, message: &str);
73
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389 /// Requests binary data from the user (a Linux-PAM extension).
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390 fn binary_prompt(&mut self, data: &[u8], data_type: u8) -> Result<BinaryData>;
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391 }
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diff changeset
392
74
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393 macro_rules! conv_fn {
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394 ($fn_name:ident($($param:ident: $pt:ty),+) -> $resp_type:ty { $ask:path }) => {
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395 fn $fn_name(&mut self, $($param: $pt),*) -> Result<$resp_type> {
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396 let prompt = $ask($($param),*);
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397 self.communicate(&[prompt.message()]);
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398 prompt.answer()
73
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399 }
74
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400 };
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401 ($fn_name:ident($($param:ident: $pt:ty),+) { $ask:path }) => {
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402 fn $fn_name(&mut self, $($param: $pt),*) {
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403 self.communicate(&[$ask($($param),*).message()]);
73
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404 }
74
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405 };
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406 }
73
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407
74
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408 impl<C: Conversation> SimpleConversation for C {
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409 conv_fn!(prompt(message: &str) -> String { Prompt::ask });
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410 conv_fn!(masked_prompt(message: &str) -> SecureString { MaskedPrompt::ask });
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411 conv_fn!(radio_prompt(message: &str) -> String { RadioPrompt::ask });
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412 conv_fn!(error_msg(message: &str) { ErrorMsg::new });
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413 conv_fn!(info_msg(message: &str) { InfoMsg::new });
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414 conv_fn!(binary_prompt(data: &[u8], data_type: u8) -> BinaryData { BinaryPrompt::ask });
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415 }
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416
74
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417 /// A [`Conversation`] which asks the questions one at a time.
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418 ///
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419 /// This is automatically created by [`SimpleConversation::as_conversation`].
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420 pub struct Demux<'a, SC: SimpleConversation>(&'a mut SC);
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421
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422 impl<SC: SimpleConversation> Conversation for Demux<'_, SC> {
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423 fn communicate(&mut self, messages: &[Message]) {
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424 for msg in messages {
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425 match msg {
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426 Message::Prompt(prompt) => prompt.set_answer(self.0.prompt(prompt.question())),
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427 Message::MaskedPrompt(prompt) => {
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428 prompt.set_answer(self.0.masked_prompt(prompt.question()))
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429 }
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430 Message::RadioPrompt(prompt) => {
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431 prompt.set_answer(self.0.radio_prompt(prompt.question()))
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432 }
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433 Message::InfoMsg(prompt) => {
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434 self.0.info_msg(prompt.question());
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435 prompt.set_answer(Ok(()))
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436 }
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437 Message::ErrorMsg(prompt) => {
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438 self.0.error_msg(prompt.question());
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439 prompt.set_answer(Ok(()))
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440 }
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441 Message::BinaryPrompt(prompt) => {
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442 let q = prompt.question();
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443 prompt.set_answer(self.0.binary_prompt(q.data, q.data_type))
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444 }
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445 }
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446 }
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447 }
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448 }
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449
69
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450 #[cfg(test)]
71
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451 mod tests {
74
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452 use super::{
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453 BinaryPrompt, Conversation, ErrorMsg, InfoMsg, MaskedPrompt, Message, Prompt, QAndA,
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454 RadioPrompt, Result, SecureString, SimpleConversation,
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455 };
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456 use crate::constants::ErrorCode;
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457 use crate::BinaryData;
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458
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459 #[test]
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460 fn test_demux() {
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461 #[derive(Default)]
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462 struct DemuxTester {
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463 error_ran: bool,
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464 info_ran: bool,
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465 }
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466
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467 impl SimpleConversation for DemuxTester {
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468 fn prompt(&mut self, request: &str) -> Result<String> {
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diff changeset
469 match request {
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470 "what" => Ok("whatwhat".to_owned()),
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471 "give_err" => Err(ErrorCode::PermissionDenied),
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472 _ => panic!("unexpected prompt!"),
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473 }
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474 }
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475 fn masked_prompt(&mut self, request: &str) -> Result<SecureString> {
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diff changeset
476 assert_eq!("reveal", request);
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477 Ok(SecureString::from("my secrets"))
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478 }
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479 fn radio_prompt(&mut self, request: &str) -> Result<String> {
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diff changeset
480 assert_eq!("channel?", request);
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481 Ok("zero".to_owned())
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482 }
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483 fn error_msg(&mut self, message: &str) {
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diff changeset
484 self.error_ran = true;
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485 assert_eq!("whoopsie", message);
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486 }
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487 fn info_msg(&mut self, message: &str) {
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488 self.info_ran = true;
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489 assert_eq!("did you know", message);
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490 }
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491 fn binary_prompt(&mut self, data: &[u8], data_type: u8) -> Result<BinaryData> {
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492 assert_eq!(&[10, 9, 8], data);
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493 assert_eq!(66, data_type);
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494 Ok(BinaryData::new(vec![5, 5, 5], 5))
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495 }
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496 }
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diff changeset
497
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498 let mut tester = DemuxTester::default();
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diff changeset
499
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500 let what = Prompt::ask("what");
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501 let pass = MaskedPrompt::ask("reveal");
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502 let err = ErrorMsg::new("whoopsie");
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503 let info = InfoMsg::new("did you know");
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504 let has_err = Prompt::ask("give_err");
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diff changeset
505
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506 let mut conv = tester.as_conversation();
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507
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508 // Basic tests.
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diff changeset
509
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
510 conv.communicate(&[
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
511 what.message(),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
512 pass.message(),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
513 err.message(),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
514 info.message(),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
515 has_err.message(),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
516 ]);
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
517
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
518 assert_eq!("whatwhat", what.answer().unwrap());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
519 assert_eq!(SecureString::from("my secrets"), pass.answer().unwrap());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
520 assert_eq!(Ok(()), err.answer());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
521 assert_eq!(Ok(()), info.answer());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
522 assert_eq!(ErrorCode::PermissionDenied, has_err.answer().unwrap_err());
70
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
523 assert!(tester.error_ran);
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
524 assert!(tester.info_ran);
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
525
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
526 // Test the Linux extensions separately.
70
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
527
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
528 let mut conv = tester.as_conversation();
70
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
529
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
530 let radio = RadioPrompt::ask("channel?");
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
531 let bin = BinaryPrompt::ask(&[10, 9, 8], 66);
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
532 conv.communicate(&[radio.message(), bin.message()]);
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
533
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
534 assert_eq!("zero", radio.answer().unwrap());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
535 assert_eq!(BinaryData::new(vec![5, 5, 5], 5), bin.answer().unwrap());
70
9f8381a1c09c Implement low-level conversation primitives.
Paul Fisher <paul@pfish.zone>
parents: 69
diff changeset
536 }
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
537
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
538 fn test_mux() {
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
539 struct MuxTester;
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
540
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
541 impl Conversation for MuxTester {
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
542 fn communicate(&mut self, messages: &[Message]) {
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
543 if let [msg] = messages {
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
544 match *msg {
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
545 Message::InfoMsg(info) => {
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
546 assert_eq!("let me tell you", info.question());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
547 info.set_answer(Ok(()))
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
548 }
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
549 Message::ErrorMsg(error) => {
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
550 assert_eq!("oh no", error.question());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
551 error.set_answer(Ok(()))
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
552 }
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
553 Message::Prompt(prompt) => prompt.set_answer(match prompt.question() {
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
554 "should_err" => Err(ErrorCode::PermissionDenied),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
555 "question" => Ok("answer".to_owned()),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
556 other => panic!("unexpected question {other:?}"),
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
557 }),
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
558 Message::MaskedPrompt(ask) => {
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
559 assert_eq!("password!", ask.question());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
560 ask.set_answer(Ok("open sesame".into()))
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
561 }
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
562 Message::BinaryPrompt(prompt) => {
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
563 assert_eq!(&[1, 2, 3], prompt.question().data);
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
564 assert_eq!(69, prompt.question().data_type);
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
565 prompt.set_answer(Ok(BinaryData::new(vec![3, 2, 1], 42)))
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
566 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
567 Message::RadioPrompt(ask) => {
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
568 assert_eq!("radio?", ask.question());
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
569 ask.set_answer(Ok("yes".to_owned()))
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
570 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
571 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
572 } else {
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
573 panic!(
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
574 "there should only be one message, not {len}",
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
575 len = messages.len()
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
576 )
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
577 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
578 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
579 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
580
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
581 let mut tester = MuxTester;
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
582
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
583 assert_eq!("answer", tester.prompt("question").unwrap());
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
584 assert_eq!(
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
585 SecureString::from("open sesame"),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
586 tester.masked_prompt("password!").unwrap()
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
587 );
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
588 tester.error_msg("oh no");
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
589 tester.info_msg("let me tell you");
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
590 {
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
591 assert_eq!("yes", tester.radio_prompt("radio?").unwrap());
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
592 assert_eq!(
74
c7c596e6388f Make conversations type-safe (last big reorg) (REAL) (NOT CLICKBAIT)
Paul Fisher <paul@pfish.zone>
parents: 73
diff changeset
593 BinaryData::new(vec![3, 2, 1], 42),
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
594 tester.binary_prompt(&[1, 2, 3], 69).unwrap(),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
595 )
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
596 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
597 assert_eq!(
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
598 ErrorCode::BufferError,
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
599 tester.prompt("should_error").unwrap_err(),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
600 );
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
601 assert_eq!(
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
602 ErrorCode::ConversationError,
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
603 tester.masked_prompt("return_wrong_type").unwrap_err()
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
604 )
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents: 72
diff changeset
605 }
69
8f3ae0c7ab92 Rework conversation data types and make safe wrappers.
Paul Fisher <paul@pfish.zone>
parents: 64
diff changeset
606 }