|
| 1 | +use anyhow::Context; |
| 2 | +use pgml::{Collection,Pipeline}; |
| 3 | +use rand::{distributions::Alphanumeric,Rng}; |
| 4 | +use reqwest::Client; |
| 5 | +use rocket::{ |
| 6 | + http::Status, |
| 7 | + outcome::IntoOutcome, |
| 8 | + request::{self,FromRequest}, |
| 9 | + route::Route, |
| 10 | + serde::json::Json, |
| 11 | +Request, |
| 12 | +}; |
| 13 | +use serde::{Deserialize,Serialize}; |
| 14 | +use serde_json::json; |
| 15 | +use std::time::{SystemTime,UNIX_EPOCH}; |
| 16 | + |
| 17 | +usecrate::{ |
| 18 | + forms, |
| 19 | + responses::{Error,ResponseOk}, |
| 20 | +}; |
| 21 | + |
| 22 | +pubstructUser{ |
| 23 | +chatbot_session_id:String, |
| 24 | +} |
| 25 | + |
| 26 | +#[rocket::async_trait] |
| 27 | +impl<'r>FromRequest<'r>forUser{ |
| 28 | +typeError =(); |
| 29 | + |
| 30 | +asyncfnfrom_request(request:&'rRequest<'_>) -> request::Outcome<User,()>{ |
| 31 | + request |
| 32 | +.cookies() |
| 33 | +.get_private("chatbot_session_id") |
| 34 | +.map(|c|User{ |
| 35 | +chatbot_session_id: c.value().to_string(), |
| 36 | +}) |
| 37 | +.or_forward(Status::Unauthorized) |
| 38 | +} |
| 39 | +} |
| 40 | + |
| 41 | +#[derive(Serialize,Deserialize,PartialEq,Eq)] |
| 42 | +enumChatRole{ |
| 43 | +User, |
| 44 | +Bot, |
| 45 | +} |
| 46 | + |
| 47 | +#[derive(Clone,Copy,Serialize,Deserialize)] |
| 48 | +enumChatbotBrain{ |
| 49 | +OpenAIGPT4, |
| 50 | +PostgresMLFalcon180b, |
| 51 | +AnthropicClaude, |
| 52 | +MetaLlama2, |
| 53 | +} |
| 54 | + |
| 55 | +implTryFrom<u8>forChatbotBrain{ |
| 56 | +typeError = anyhow::Error; |
| 57 | + |
| 58 | +fntry_from(value:u8) -> anyhow::Result<Self>{ |
| 59 | +match value{ |
| 60 | +0 =>Ok(ChatbotBrain::OpenAIGPT4), |
| 61 | +1 =>Ok(ChatbotBrain::PostgresMLFalcon180b), |
| 62 | +2 =>Ok(ChatbotBrain::AnthropicClaude), |
| 63 | +3 =>Ok(ChatbotBrain::MetaLlama2), |
| 64 | + _ =>Err(anyhow::anyhow!("Invalid brain id")), |
| 65 | +} |
| 66 | +} |
| 67 | +} |
| 68 | + |
| 69 | +#[derive(Clone,Copy,Serialize,Deserialize)] |
| 70 | +enumKnowledgeBase{ |
| 71 | +PostgresML, |
| 72 | +PyTorch, |
| 73 | +Rust, |
| 74 | +PostgreSQL, |
| 75 | +} |
| 76 | + |
| 77 | +implKnowledgeBase{ |
| 78 | +// The topic and knowledge base are the same for now but may be different later |
| 79 | +fntopic(&self) ->&'staticstr{ |
| 80 | +matchself{ |
| 81 | +Self::PostgresML =>"PostgresML", |
| 82 | +Self::PyTorch =>"PyTorch", |
| 83 | +Self::Rust =>"Rust", |
| 84 | +Self::PostgreSQL =>"PostgreSQL", |
| 85 | +} |
| 86 | +} |
| 87 | + |
| 88 | +fncollection(&self) ->&'staticstr{ |
| 89 | +matchself{ |
| 90 | +Self::PostgresML =>"PostgresML", |
| 91 | +Self::PyTorch =>"PyTorch", |
| 92 | +Self::Rust =>"Rust", |
| 93 | +Self::PostgreSQL =>"PostgreSQL", |
| 94 | +} |
| 95 | +} |
| 96 | +} |
| 97 | + |
| 98 | +implTryFrom<u8>forKnowledgeBase{ |
| 99 | +typeError = anyhow::Error; |
| 100 | + |
| 101 | +fntry_from(value:u8) -> anyhow::Result<Self>{ |
| 102 | +match value{ |
| 103 | +0 =>Ok(KnowledgeBase::PostgresML), |
| 104 | +1 =>Ok(KnowledgeBase::PyTorch), |
| 105 | +2 =>Ok(KnowledgeBase::Rust), |
| 106 | +3 =>Ok(KnowledgeBase::PostgreSQL), |
| 107 | + _ =>Err(anyhow::anyhow!("Invalid knowledge base id")), |
| 108 | +} |
| 109 | +} |
| 110 | +} |
| 111 | + |
| 112 | +#[derive(Serialize,Deserialize)] |
| 113 | +structDocument{ |
| 114 | +id:String, |
| 115 | +text:String, |
| 116 | +role:ChatRole, |
| 117 | +user_id:String, |
| 118 | +model:ChatbotBrain, |
| 119 | +knowledge_base:KnowledgeBase, |
| 120 | +timestamp:u128, |
| 121 | +} |
| 122 | + |
| 123 | +implDocument{ |
| 124 | +fnnew(text:String,role:ChatRole,user_id:String,model:ChatbotBrain,knowledge_base:KnowledgeBase) ->Document{ |
| 125 | +let id = rand::thread_rng() |
| 126 | +.sample_iter(&Alphanumeric) |
| 127 | +.take(32) |
| 128 | +.map(char::from) |
| 129 | +.collect(); |
| 130 | +let timestamp =SystemTime::now() |
| 131 | +.duration_since(UNIX_EPOCH) |
| 132 | +.unwrap() |
| 133 | +.as_millis(); |
| 134 | +Document{ |
| 135 | + id, |
| 136 | + text, |
| 137 | + role, |
| 138 | + user_id, |
| 139 | + model, |
| 140 | + knowledge_base, |
| 141 | + timestamp, |
| 142 | +} |
| 143 | +} |
| 144 | +} |
| 145 | + |
| 146 | +asyncfnget_openai_chatgpt_answer( |
| 147 | +knowledge_base:KnowledgeBase, |
| 148 | +history:&str, |
| 149 | +context:&str, |
| 150 | +question:&str, |
| 151 | +) ->Result<String,Error>{ |
| 152 | +let openai_api_key = std::env::var("OPENAI_API_KEY")?; |
| 153 | +let base_prompt = std::env::var("CHATBOT_CHATGPT_BASE_PROMPT")?; |
| 154 | +let system_prompt = std::env::var("CHATBOT_CHATGPT_SYSTEM_PROMPT")?; |
| 155 | + |
| 156 | +let system_prompt = system_prompt |
| 157 | +.replace("{topic}", knowledge_base.topic()) |
| 158 | +.replace("{persona}","Engineer") |
| 159 | +.replace("{language}","English"); |
| 160 | + |
| 161 | +let content = base_prompt |
| 162 | +.replace("{history}", history) |
| 163 | +.replace("{context}", context) |
| 164 | +.replace("{question}", question); |
| 165 | + |
| 166 | +let body =json!({ |
| 167 | +"model":"gpt-4", |
| 168 | +"messages":[{"role":"system","content": system_prompt},{"role":"user","content": content}], |
| 169 | +"temperature":0.7 |
| 170 | +}); |
| 171 | + |
| 172 | +let response =Client::new() |
| 173 | +.post("https://api.openai.com/v1/chat/completions") |
| 174 | +.bearer_auth(openai_api_key) |
| 175 | +.json(&body) |
| 176 | +.send() |
| 177 | +.await? |
| 178 | +.json::<serde_json::Value>() |
| 179 | +.await?; |
| 180 | + |
| 181 | +let response = response["choices"] |
| 182 | +.as_array() |
| 183 | +.context("No data returned from OpenAI")?[0]["message"]["content"] |
| 184 | +.as_str() |
| 185 | +.context("The reponse content from OpenAI was not a string")? |
| 186 | +.to_string(); |
| 187 | + |
| 188 | +Ok(response) |
| 189 | +} |
| 190 | + |
| 191 | +#[post("/chatbot/get-answer", format ="json", data ="<data>")] |
| 192 | +pubasyncfnchatbot_get_answer( |
| 193 | +user:User, |
| 194 | +data:Json<forms::ChatbotPostData>, |
| 195 | +) ->Result<ResponseOk,Error>{ |
| 196 | +matchwrapped_chatbot_get_answer(user, data).await{ |
| 197 | +Ok(response) =>Ok(ResponseOk( |
| 198 | +json!({ |
| 199 | +"answer": response, |
| 200 | +}) |
| 201 | +.to_string(), |
| 202 | +)), |
| 203 | +Err(error) =>{ |
| 204 | +eprintln!("Error: {:?}", error); |
| 205 | +Ok(ResponseOk( |
| 206 | +json!({ |
| 207 | +"error": error.to_string(), |
| 208 | +}) |
| 209 | +.to_string(), |
| 210 | +)) |
| 211 | +} |
| 212 | +} |
| 213 | +} |
| 214 | + |
| 215 | +pubasyncfnwrapped_chatbot_get_answer( |
| 216 | +user:User, |
| 217 | +data:Json<forms::ChatbotPostData>, |
| 218 | +) ->Result<String,Error>{ |
| 219 | +let brain =ChatbotBrain::try_from(data.model)?; |
| 220 | +let knowledge_base =KnowledgeBase::try_from(data.knowledge_base)?; |
| 221 | + |
| 222 | +// Create it up here so the timestamps that order the conversation are accurate |
| 223 | +let user_document =Document::new( |
| 224 | + data.question.clone(), |
| 225 | +ChatRole::User, |
| 226 | + user.chatbot_session_id.clone(), |
| 227 | + brain, |
| 228 | + knowledge_base |
| 229 | +); |
| 230 | + |
| 231 | +let collection = knowledge_base.collection(); |
| 232 | +let collection =Collection::new( |
| 233 | + collection, |
| 234 | +Some(std::env::var("CHATBOT_DATABASE_URL").expect("CHATBOT_DATABASE_URL not set")), |
| 235 | +); |
| 236 | + |
| 237 | +letmut history_collection =Collection::new( |
| 238 | +"ChatHistory", |
| 239 | +Some(std::env::var("CHATBOT_DATABASE_URL").expect("CHATBOT_DATABASE_URL not set")), |
| 240 | +); |
| 241 | +let messages = history_collection |
| 242 | +.get_documents(Some( |
| 243 | +json!({ |
| 244 | +"limit":5, |
| 245 | +"order_by":{"timestamp":"desc"}, |
| 246 | +"filter":{ |
| 247 | +"metadata":{ |
| 248 | +"$and":[ |
| 249 | +{ |
| 250 | +"$or": |
| 251 | +[ |
| 252 | +{"role":{"$eq":ChatRole::Bot}}, |
| 253 | +{"role":{"$eq":ChatRole::User}} |
| 254 | +] |
| 255 | +}, |
| 256 | +{ |
| 257 | +"user_id":{ |
| 258 | +"$eq": user.chatbot_session_id |
| 259 | +} |
| 260 | +}, |
| 261 | +{ |
| 262 | +"knowledge_base":{ |
| 263 | +"$eq": knowledge_base |
| 264 | +} |
| 265 | +}, |
| 266 | +{ |
| 267 | +"model":{ |
| 268 | +"$eq": brain |
| 269 | +} |
| 270 | +} |
| 271 | +] |
| 272 | +} |
| 273 | +} |
| 274 | + |
| 275 | +}) |
| 276 | +.into(), |
| 277 | +)) |
| 278 | +.await?; |
| 279 | + |
| 280 | +letmut history = messages |
| 281 | +.into_iter() |
| 282 | +.map(|m|{ |
| 283 | +// Can probably remove this clone |
| 284 | +let chat_role:ChatRole = serde_json::from_value(m["document"]["role"].to_owned())?; |
| 285 | +if chat_role ==ChatRole::Bot{ |
| 286 | +Ok(format!("Assistant: {}", m["document"]["text"])) |
| 287 | +}else{ |
| 288 | +Ok(format!("User: {}", m["document"]["text"])) |
| 289 | +} |
| 290 | +}) |
| 291 | +.collect::<anyhow::Result<Vec<String>>>()?; |
| 292 | + history.reverse(); |
| 293 | +let history = history.join("\n"); |
| 294 | + |
| 295 | +letmut pipeline =Pipeline::new("v1",None,None,None); |
| 296 | +let context = collection |
| 297 | +.query() |
| 298 | +.vector_recall(&data.question,&mut pipeline,Some(json!({ |
| 299 | +"instruction":"Represent the Wikipedia question for retrieving supporting documents: " |
| 300 | +}).into())) |
| 301 | +.limit(5) |
| 302 | +.fetch_all() |
| 303 | +.await? |
| 304 | +.into_iter() |
| 305 | +.map(|(_, context, metadata)|format!("#### Document {}: {}", metadata["id"], context)) |
| 306 | +.collect::<Vec<String>>() |
| 307 | +.join("\n"); |
| 308 | + |
| 309 | +let answer =match brain{ |
| 310 | + _ =>get_openai_chatgpt_answer(knowledge_base,&history,&context,&data.question).await, |
| 311 | +}?; |
| 312 | + |
| 313 | +let new_history_messages:Vec<pgml::types::Json> =vec![ |
| 314 | + serde_json::to_value(user_document).unwrap().into(), |
| 315 | + serde_json::to_value(Document::new( |
| 316 | + answer.clone(), |
| 317 | +ChatRole::Bot, |
| 318 | + user.chatbot_session_id.clone(), |
| 319 | + brain, |
| 320 | + knowledge_base |
| 321 | +)) |
| 322 | +.unwrap() |
| 323 | +.into(), |
| 324 | +]; |
| 325 | + |
| 326 | +// We do not want to block our return waiting for this to happen |
| 327 | + tokio::spawn(asyncmove{ |
| 328 | + history_collection |
| 329 | +.upsert_documents(new_history_messages,None) |
| 330 | +.await.expect("Failed to upsert user history"); |
| 331 | +}); |
| 332 | + |
| 333 | +Ok(answer) |
| 334 | +} |
| 335 | + |
| 336 | +pubfnroutes() ->Vec<Route>{ |
| 337 | +routes![chatbot_get_answer] |
| 338 | +} |