Chore/Google GenAI (#4742)

* update @langchain/core, custom google genai implementation

* update @langchain/core, custom google genai implementation

packages/components/nodes/chatmodels/ChatGoogleGenerativeAI/utils/output_parsers.ts

@@ -0,0 +1,63 @@
+import { BaseLLMOutputParser, OutputParserException } from '@langchain/core/output_parsers'
+import { ChatGeneration } from '@langchain/core/outputs'
+import { ToolCall } from '@langchain/core/messages/tool'
+import { InteropZodType, interopSafeParseAsync } from '@langchain/core/utils/types'
+import { JsonOutputKeyToolsParserParamsInterop } from '@langchain/core/output_parsers/openai_tools'
+
+interface GoogleGenerativeAIToolsOutputParserParams<T extends Record<string, any>> extends JsonOutputKeyToolsParserParamsInterop<T> {}
+
+export class GoogleGenerativeAIToolsOutputParser<T extends Record<string, any> = Record<string, any>> extends BaseLLMOutputParser<T> {
+    static lc_name() {
+        return 'GoogleGenerativeAIToolsOutputParser'
+    }
+
+    lc_namespace = ['langchain', 'google_genai', 'output_parsers']
+
+    returnId = false
+
+    /** The type of tool calls to return. */
+    keyName: string
+
+    /** Whether to return only the first tool call. */
+    returnSingle = false
+
+    zodSchema?: InteropZodType<T>
+
+    constructor(params: GoogleGenerativeAIToolsOutputParserParams<T>) {
+        super(params)
+        this.keyName = params.keyName
+        this.returnSingle = params.returnSingle ?? this.returnSingle
+        this.zodSchema = params.zodSchema
+    }
+
+    protected async _validateResult(result: unknown): Promise<T> {
+        if (this.zodSchema === undefined) {
+            return result as T
+        }
+        const zodParsedResult = await interopSafeParseAsync(this.zodSchema, result)
+        if (zodParsedResult.success) {
+            return zodParsedResult.data
+        } else {
+            throw new OutputParserException(
+                `Failed to parse. Text: "${JSON.stringify(result, null, 2)}". Error: ${JSON.stringify(zodParsedResult.error.issues)}`,
+                JSON.stringify(result, null, 2)
+            )
+        }
+    }
+
+    async parseResult(generations: ChatGeneration[]): Promise<T> {
+        const tools = generations.flatMap((generation) => {
+            const { message } = generation
+            if (!('tool_calls' in message) || !Array.isArray(message.tool_calls)) {
+                return []
+            }
+            return message.tool_calls as ToolCall[]
+        })
+        if (tools[0] === undefined) {
+            throw new Error('No parseable tool calls provided to GoogleGenerativeAIToolsOutputParser.')
+        }
+        const [tool] = tools
+        const validatedResult = await this._validateResult(tool.args)
+        return validatedResult
+    }
+}