Add OpenAI provider

package.json

@@ -65,6 +65,7 @@
         "@langchain/community": "^0.3.31",
         "@langchain/core": "^0.3.40",
         "@langchain/mistralai": "^0.1.1",
+        "@langchain/openai": "^0.4.4",
         "@lumino/coreutils": "^2.1.2",
         "@lumino/polling": "^2.1.2",
         "@lumino/signaling": "^2.1.2",

schema/ai-provider.json

@@ -10,7 +10,7 @@
       "title": "The AI provider",
       "description": "The AI provider to use for chat and completion",
       "default": "None",
-      "enum": ["None", "Anthropic", "ChromeAI", "MistralAI"]
+      "enum": ["None", "Anthropic", "ChromeAI", "MistralAI", "OpenAI"]
     }
   },
   "additionalProperties": true

scripts/settings-generator.js

@@ -43,6 +43,11 @@ const providers = {
     path: 'node_modules/@langchain/anthropic/dist/chat_models.d.ts',
     type: 'AnthropicInput',
     excludedProps: ['clientOptions']
+  },
+  openAI: {
+    path: 'node_modules/@langchain/openai/dist/chat_models.d.ts',
+    type: 'ChatOpenAIFields',
+    excludedProps: ['configuration']
   }
 };
 
@@ -53,7 +58,8 @@ Object.entries(providers).forEach(([name, desc], index) => {
     path: desc.path,
     tsconfig: './tsconfig.json',
     type: desc.type,
-    functions: 'hide'
+    functions: 'hide',
+    topRef: false
   };
 
   const outputPath = path.join(outputDir, `${name}.json`);
@@ -81,33 +87,35 @@ Object.entries(providers).forEach(([name, desc], index) => {
   }
 
   // Remove the properties from extended class.
-  const providerKeys = Object.keys(schema.definitions[desc.type]['properties']);
-
+  const providerKeys = Object.keys(schema.properties);
   Object.keys(
     schemaBase.definitions?.['BaseLanguageModelParams']['properties']
   ).forEach(key => {
     if (providerKeys.includes(key)) {
-      delete schema.definitions?.[desc.type]['properties'][key];
+      delete schema.properties?.[key];
     }
   });
 
-  // Remove the useless definitions.
-  let change = true;
-  while (change) {
-    change = false;
-    const temporarySchemaString = JSON.stringify(schema);
-
-    Object.keys(schema.definitions).forEach(key => {
-      const index = temporarySchemaString.indexOf(`#/definitions/${key}`);
-      if (index === -1) {
-        delete schema.definitions?.[key];
-        change = true;
-      }
-    });
+  // Replace all references by their value, and remove the useless definitions.
+  const defKeys = Object.keys(schema.definitions);
+  for (let i = defKeys.length - 1; i >= 0; i--) {
+    let schemaString = JSON.stringify(schema);
+    const key = defKeys[i];
+    const reference = `"$ref":"#/definitions/${key}"`;
+
+    // Replace all the references to the definition by the content (after removal of the brace).
+    const replacement = JSON.stringify(schema.definitions?.[key]).slice(1, -1);
+    temporarySchemaString = schemaString.replaceAll(reference, replacement);
+    // Build again the schema from the string representation if it change.
+    if (schemaString !== temporarySchemaString) {
+      schema = JSON.parse(temporarySchemaString);
+    }
+    // Remove the definition
+    delete schema.definitions?.[key];
   }
 
   // Transform the default values.
-  Object.values(schema.definitions[desc.type]['properties']).forEach(value => {
+  Object.values(schema.properties).forEach(value => {
     const defaultValue = value.default;
     if (!defaultValue) {
       return;

src/llm-models/openai-completer.ts

@@ -0,0 +1,67 @@
+import {
+  CompletionHandler,
+  IInlineCompletionContext
+} from '@jupyterlab/completer';
+import { BaseChatModel } from '@langchain/core/language_models/chat_models';
+import { AIMessage, SystemMessage } from '@langchain/core/messages';
+import { ChatOpenAI } from '@langchain/openai';
+
+import { BaseCompleter, IBaseCompleter } from './base-completer';
+import { COMPLETION_SYSTEM_PROMPT } from '../provider';
+
+export class OpenAICompleter implements IBaseCompleter {
+  constructor(options: BaseCompleter.IOptions) {
+    this._openAIProvider = new ChatOpenAI({ ...options.settings });
+  }
+
+  get provider(): BaseChatModel {
+    return this._openAIProvider;
+  }
+
+  /**
+   * Getter and setter for the initial prompt.
+   */
+  get prompt(): string {
+    return this._prompt;
+  }
+  set prompt(value: string) {
+    this._prompt = value;
+  }
+
+  async fetch(
+    request: CompletionHandler.IRequest,
+    context: IInlineCompletionContext
+  ) {
+    const { text, offset: cursorOffset } = request;
+    const prompt = text.slice(0, cursorOffset);
+
+    const messages = [new SystemMessage(this._prompt), new AIMessage(prompt)];
+
+    try {
+      const response = await this._openAIProvider.invoke(messages);
+      const items = [];
+      if (typeof response.content === 'string') {
+        items.push({
+          insertText: response.content
+        });
+      } else {
+        response.content.forEach(content => {
+          if (content.type !== 'text') {
+            return;
+          }
+          items.push({
+            insertText: content.text,
+            filterText: prompt.substring(prompt.length)
+          });
+        });
+      }
+      return { items };
+    } catch (error) {
+      console.error('Error fetching completions', error);
+      return { items: [] };
+    }
+  }
+
+  private _openAIProvider: ChatOpenAI;
+  private _prompt: string = COMPLETION_SYSTEM_PROMPT;
+}

src/llm-models/utils.ts

@@ -2,17 +2,19 @@ import { ChatAnthropic } from '@langchain/anthropic';
 import { ChromeAI } from '@langchain/community/experimental/llms/chrome_ai';
 import { BaseChatModel } from '@langchain/core/language_models/chat_models';
 import { ChatMistralAI } from '@langchain/mistralai';
-import { JSONObject } from '@lumino/coreutils';
+import { ChatOpenAI } from '@langchain/openai';
 
 import { IBaseCompleter } from './base-completer';
 import { AnthropicCompleter } from './anthropic-completer';
 import { CodestralCompleter } from './codestral-completer';
 import { ReadonlyPartialJSONObject } from '@lumino/coreutils';
 import { ChromeCompleter } from './chrome-completer';
+import { OpenAICompleter } from './openai-completer';
 
 import chromeAI from '../_provider-settings/chromeAI.json';
 import mistralAI from '../_provider-settings/mistralAI.json';
 import anthropic from '../_provider-settings/anthropic.json';
+import openAI from '../_provider-settings/openAI.json';
 
 /**
  * Get an LLM completer from the name.
@@ -27,6 +29,8 @@ export function getCompleter(
     return new AnthropicCompleter({ settings });
   } else if (name === 'ChromeAI') {
     return new ChromeCompleter({ settings });
+  } else if (name === 'OpenAI') {
+    return new OpenAICompleter({ settings });
   }
   return null;
 }
@@ -46,6 +50,8 @@ export function getChatModel(
     // TODO: fix
     // @ts-expect-error: missing properties
     return new ChromeAI({ ...settings });
+  } else if (name === 'OpenAI') {
+    return new ChatOpenAI({ ...settings });
   }
   return null;
 }
@@ -60,20 +66,24 @@ export function getErrorMessage(name: string, error: any): string {
     return error.error.error.message;
   } else if (name === 'ChromeAI') {
     return error.message;
+  } else if (name === 'OpenAI') {
+    return error.message;
   }
   return 'Unknown provider';
 }
 
 /*
  * Get an LLM completer from the name.
  */
-export function getSettings(name: string): JSONObject | null {
+export function getSettings(name: string): any {
   if (name === 'MistralAI') {
-    return mistralAI.definitions.ChatMistralAIInput.properties;
+    return mistralAI.properties;
   } else if (name === 'Anthropic') {
-    return anthropic.definitions.AnthropicInput.properties;
+    return anthropic.properties;
   } else if (name === 'ChromeAI') {
-    return chromeAI.definitions.ChromeAIInputs.properties;
+    return chromeAI.properties;
+  } else if (name === 'OpenAI') {
+    return openAI.properties;
   }
 
   return null;

yarn.lock

@@ -1969,6 +1969,7 @@ __metadata:
     "@langchain/community": ^0.3.31
     "@langchain/core": ^0.3.40
     "@langchain/mistralai": ^0.1.1
+    "@langchain/openai": ^0.4.4
     "@lumino/coreutils": ^2.1.2
     "@lumino/polling": ^2.1.2
     "@lumino/signaling": ^2.1.2
@@ -2449,7 +2450,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@langchain/openai@npm:>=0.2.0 <0.5.0":
+"@langchain/openai@npm:>=0.2.0 <0.5.0, @langchain/openai@npm:^0.4.4":
   version: 0.4.4
   resolution: "@langchain/openai@npm:0.4.4"
   dependencies: