OpenAI: Chat, Start

// GraalJS Script (engine type: 2)

//////// START "main()" /////////////////////////////////////////////////////////////////

main();
function main(){ 

////// == Config Retrieving / 工程コンフィグの参照 ==
const strAuthzSetting   = configs.get      ( "AuthzConfU" );   /// REQUIRED
  engine.log( " AutomatedTask Config: Authz Setting: " + strAuthzSetting );
const strPrompt         = configs.get      ( "StrConfA1" );    /// REQUIRED
  if( strPrompt       === "" ){
    throw new Error( "\n AutomatedTask ConfigError:" +
                     " Config {A1: Prompt} must be non-empty \n" );
  }
const strPocketCompletion       = configs.getObject( "SelectConfB1" ); /// REQUIRED
const numPocketPromptTokens     = configs.getObject( "SelectConfC1" ); // NotRequired
const numPocketCompletionTokens = configs.getObject( "SelectConfC2" ); // NotRequired
const numPocketTotalTokens      = configs.getObject( "SelectConfC3" ); // NotRequired


////// == Data Retrieving / ワークフローデータの参照 ==
// (Nothing. Retrieved via Expression Language in Config Retrieving)


////// == Calculating / 演算 ==

//// OpenAI API > Documentation > API REFERENCE > CHAT
//// https://platform.openai.com/docs/api-reference/chat

/// prepare json
let strJson = {};
    strJson.model = "gpt-3.5-turbo";
    strJson.messages = [];
    strJson.messages[0] = {};
    strJson.messages[0].role = "user";
    strJson.messages[0].content = strPrompt;

/// prepare request1
let request1Uri = "https://api.openai.com/v1/chat/completions";
let request1 = httpClient.begin(); // HttpRequestWrapper
    request1 = request1.authSetting( strAuthzSetting ); // with "Authorization: Bearer XX"
    request1 = request1.body( JSON.stringify( strJson ), "application/json" );

/// try request1
const response1     = request1.post( request1Uri ); // HttpResponseWrapper
engine.log( " AutomatedTask ApiRequest1 Start: " + request1Uri );
const response1Code = response1.getStatusCode() + ""; // JavaNum to string
const response1Body = response1.getResponseAsString();
engine.log( " AutomatedTask ApiResponse1 Status: " + response1Code );
if( response1Code !== "200"){
  throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                    response1Code + "\n" + response1Body + "\n" );
}

/// parse response1
/* engine.log( response1Body ); // debug
{
  "id":"chatcmpl-6pttfxxxxxmzOKmyyyyy9A2gIwwww",
  "object":"chat.completion",
  "created":1677827615,
  "model":"gpt-3.5-turbo-0301",
  "usage":{
    "prompt_tokens":41,
    "completion_tokens":424,
    "total_tokens":465
  },
  "choices":[{
    "message":{
      "role":"assistant",
      "content":"\n\n京都の良さは、数え切れないほどたくさんありますが...\n\n清水寺は..."
    },
    "finish_reason":null,
    "index":0
  }]
}
*/
const response1Obj = JSON.parse( response1Body );


////// == Data Updating / ワークフローデータへの代入 ==

if( strPocketCompletion !== null ){
  engine.setData( strPocketCompletion,
                  response1Obj.choices[0].message.content ?? ""
                );
}
if( numPocketPromptTokens !== null ){
  engine.setData( numPocketPromptTokens, new java.math.BigDecimal(
                  response1Obj.usage.prompt_tokens ?? 0
                ));
}
if( numPocketCompletionTokens !== null ){
  engine.setData( numPocketCompletionTokens, new java.math.BigDecimal(
                  response1Obj.usage.completion_tokens ?? 0
                ));
}
if( numPocketTotalTokens !== null ){
  engine.setData( numPocketTotalTokens, new java.math.BigDecimal(
                  response1Obj.usage.total_tokens ?? 0
                ));
}
// "??": Nullish coalescing operator (ES11)
// https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing

} //////// END "main()" /////////////////////////////////////////////////////////////////


/*
Notes:
- About "OpenAI API"
    - https://platform.openai.com/docs/introduction/overview
    - The OpenAI API can be applied to virtually any task that involves understanding or generating natural language or code.
    - For example, if you give the API the prompt, "Write a tagline for an ice cream shop",
    - it will return a completion like "We serve up smiles with every scoop!"
- If you place this "Addon Automated Step" on the Workflow diagram, 
    - a response will be retrieved automatically when the token reaches the automated step.
    - A request prompt is automatically sent to the OpenAI API server. (REST API communication)
- API key is required to use the OpenAI API.
    - Obtain the API key to be used in advance.

APPENDIX
- Header for developers belonging to multiple organizations is not supported (as of 202303)
     - `OpenAI-Organization`
- Requests with context are not supported.
     - You cannot set the flow of conversation in this auto-step.
- To activate the Workflow App including this "Add-on automated Step", "HTTP Authorization Setting" is required.
     - Set "Secret API Key" as communication token. (Token Fixed Value)

Notes-ja:
- "OpenAI API" とは
    - https://platform.openai.com/docs/introduction/overview
    - OpenAI API は、自然言語やコードを理解し、自然言語やコードを生成します。あらゆる仕事に適用可能です。
    - たとえば、「アイスクリーム屋のキャッチフレーズを書いて」というプロンプト（Prompt）を与えると、
    - 「全てのスクープを笑顔で！」といった応答（Completion）が返されます。 (Questetra社の意訳)
- この［アドオン自動工程］をワークフロー図に配置すれば、案件が工程に到達した際、応答が取得されます。
    - OpenAI API サーバに対してリクエスト文が自動的に送信されます。（REST API通信）
- OpenAI API の利用には API key が必要です。
    - あらかじめ "Secret API Key" を取得しておいてください。

APPENDIX-ja
- 複数組織に所属する開発者向けのヘッダには未対応です（202303時点）
    - `OpenAI-Organization`
- 文脈を使ったリクエストには未対応です。
    - この自動工程では会話の流れを設定することはできません。
- この［アドオン自動工程］を含むワークフローアプリを運用するには［HTTP 認証設定］が必要です。
    - "Secret API Key" を通信トークンとしてセットします。［トークン直接指定］
*/