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* Copyright 2025 IBM Corp.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ToolEmitter, Tool, ToolInput } from \"@/tools/base.js\";\nimport { z } from \"zod\";\nimport { Emitter } from \"@/emitter/emitter.js\";\nimport { createURLParams } from \"@/internals/fetcher.js\";\nimport { RunContext } from \"@/context.js\";\nimport {\n SearchToolOptions,\n SearchToolOutput,\n SearchToolResult,\n SearchToolRunOptions,\n} from \"@/tools/search/base.js\";\nimport { ValidationError } from \"ajv\";\nimport { parseEnv } from \"@/internals/env.js\";\n\nexport interface SearXNGToolOptions extends SearchToolOptions {\n baseUrl?: string;\n maxResults: number;\n}\n\ntype SearXNGToolRunOptions = SearchToolRunOptions;\n\nexport interface SearXNGToolResult extends SearchToolResult {}\n\nexport class SearXNGToolOutput extends SearchToolOutput {\n static {\n this.register();\n }\n\n createSnapshot() {\n return {\n results: this.results,\n };\n }\n\n loadSnapshot(snapshot: ReturnType) {\n Object.assign(this, snapshot);\n }\n}\n\nexport class SearXNGTool extends Tool<\n SearXNGToolOutput,\n SearXNGToolOptions,\n SearXNGToolRunOptions\n> {\n name = \"Web Search\";\n description = `Search for online trends, news, current events, real-time information, or research topics.`;\n\n public readonly emitter: ToolEmitter, SearchToolOutput> =\n Emitter.root.child({\n namespace: [\"tool\", \"search\", \"searXNG\"],\n creator: this,\n });\n\n inputSchema() {\n return z.object({\n query: z.string().min(1).describe(`Web search query.`),\n });\n }\n\n public constructor(options: SearXNGToolOptions = { maxResults: 10 }) {\n super(options);\n\n if (options.maxResults < 1 || options.maxResults > 100) {\n throw new ValidationError([\n {\n message: \"Property 'maxResults' must be between 1 and 100\",\n propertyName: \"options.maxResults\",\n },\n ]);\n }\n }\n\n protected async _run(\n input: ToolInput,\n _options: Partial,\n run: RunContext,\n ) {\n const params = createURLParams({\n q: input.query,\n format: \"json\",\n });\n\n const baseUrl = this.options.baseUrl || parseEnv(\"SEARXNG_BASE_URL\", z.string());\n const url = `${baseUrl}?${decodeURIComponent(params.toString())}`;\n const response = await fetch(url, {\n signal: run.signal,\n });\n\n if (!response.ok) {\n throw new Error(await response.text());\n }\n\n const data = await response.json();\n\n return new SearXNGToolOutput(\n data.results\n .slice(0, this.options.maxResults)\n .map((result: { url: string; title: string; content: string }) => ({\n url: result.url || \"\",\n title: result.title || \"\",\n description: result.content || \"\",\n })),\n );\n }\n}\n"]}