refactor: move general utils to shared directory

shared/utils/ai-model.ts

@@ -0,0 +1,63 @@
+import { createDeepSeek } from "@ai-sdk/deepseek"
+import { createOpenAI } from "@ai-sdk/openai"
+import { createOpenRouter } from "@openrouter/ai-sdk-provider"
+import { wrapLanguageModel, extractReasoningMiddleware } from "ai"
+import type { LanguageModelV1 } from "ai"
+
+export function getLanguageModel(config: ConfigAi) {
+  const apiBase = getApiBase(config)
+  let model: LanguageModelV1
+
+  if (config.provider === 'openrouter') {
+    const openRouter = createOpenRouter({
+      apiKey: config.apiKey,
+      baseURL: apiBase,
+    })
+    model = openRouter(config.model, {
+      includeReasoning: true,
+    })
+  } else if (
+    config.provider === 'deepseek' ||
+    config.provider === 'siliconflow' ||
+    config.provider === 'infiniai' ||
+    // Special case if model name includes 'deepseek'
+    // This ensures compatibilty with providers like Siliconflow
+    config.model?.toLowerCase().includes('deepseek')
+  ) {
+    const deepSeek = createDeepSeek({
+      apiKey: config.apiKey,
+      baseURL: apiBase,
+    })
+    model = deepSeek(config.model)
+  } else {
+    const openai = createOpenAI({
+      apiKey: config.apiKey,
+      baseURL: apiBase,
+    })
+    model = openai(config.model)
+  }
+
+  return wrapLanguageModel({
+    model,
+    middleware: extractReasoningMiddleware({ tagName: 'think' }),
+  })
+}
+
+export function getApiBase(config: ConfigAi) {
+  if (config.provider === 'openrouter') {
+    return config.apiBase || 'https://openrouter.ai/api/v1'
+  }
+  if (config.provider === 'deepseek') {
+    return config.apiBase || 'https://api.deepseek.com/v1'
+  }
+  if (config.provider === 'ollama') {
+    return config.apiBase || 'http://localhost:11434/v1'
+  }
+  if (config.provider === 'siliconflow') {
+    return config.apiBase || 'https://api.siliconflow.cn/v1'
+  }
+  if (config.provider === 'infiniai') {
+    return config.apiBase || 'https://cloud.infini-ai.com/maas/v1'
+  }
+  return config.apiBase || 'https://api.openai.com/v1'
+}