feat: add guided /provider setup

src/utils/providerDiscovery.ts

@@ -0,0 +1,129 @@
+import type { OllamaModelDescriptor } from './providerRecommendation.ts'
+
+export const DEFAULT_OLLAMA_BASE_URL = 'http://localhost:11434'
+
+function withTimeoutSignal(timeoutMs: number): {
+  signal: AbortSignal
+  clear: () => void
+} {
+  const controller = new AbortController()
+  const timeout = setTimeout(() => controller.abort(), timeoutMs)
+  return {
+    signal: controller.signal,
+    clear: () => clearTimeout(timeout),
+  }
+}
+
+function trimTrailingSlash(value: string): string {
+  return value.replace(/\/+$/, '')
+}
+
+export function getOllamaApiBaseUrl(baseUrl?: string): string {
+  const parsed = new URL(
+    baseUrl || process.env.OLLAMA_BASE_URL || DEFAULT_OLLAMA_BASE_URL,
+  )
+  const pathname = trimTrailingSlash(parsed.pathname)
+  parsed.pathname = pathname.endsWith('/v1')
+    ? pathname.slice(0, -3) || '/'
+    : pathname || '/'
+  parsed.search = ''
+  parsed.hash = ''
+  return trimTrailingSlash(parsed.toString())
+}
+
+export function getOllamaChatBaseUrl(baseUrl?: string): string {
+  return `${getOllamaApiBaseUrl(baseUrl)}/v1`
+}
+
+export async function hasLocalOllama(baseUrl?: string): Promise<boolean> {
+  const { signal, clear } = withTimeoutSignal(1200)
+  try {
+    const response = await fetch(`${getOllamaApiBaseUrl(baseUrl)}/api/tags`, {
+      method: 'GET',
+      signal,
+    })
+    return response.ok
+  } catch {
+    return false
+  } finally {
+    clear()
+  }
+}
+
+export async function listOllamaModels(
+  baseUrl?: string,
+): Promise<OllamaModelDescriptor[]> {
+  const { signal, clear } = withTimeoutSignal(5000)
+  try {
+    const response = await fetch(`${getOllamaApiBaseUrl(baseUrl)}/api/tags`, {
+      method: 'GET',
+      signal,
+    })
+    if (!response.ok) {
+      return []
+    }
+
+    const data = (await response.json()) as {
+      models?: Array<{
+        name?: string
+        size?: number
+        details?: {
+          family?: string
+          families?: string[]
+          parameter_size?: string
+          quantization_level?: string
+        }
+      }>
+    }
+
+    return (data.models ?? [])
+      .filter(model => Boolean(model.name))
+      .map(model => ({
+        name: model.name!,
+        sizeBytes: typeof model.size === 'number' ? model.size : null,
+        family: model.details?.family ?? null,
+        families: model.details?.families ?? [],
+        parameterSize: model.details?.parameter_size ?? null,
+        quantizationLevel: model.details?.quantization_level ?? null,
+      }))
+  } catch {
+    return []
+  } finally {
+    clear()
+  }
+}
+
+export async function benchmarkOllamaModel(
+  modelName: string,
+  baseUrl?: string,
+): Promise<number | null> {
+  const start = Date.now()
+  const { signal, clear } = withTimeoutSignal(20000)
+  try {
+    const response = await fetch(`${getOllamaApiBaseUrl(baseUrl)}/api/chat`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      signal,
+      body: JSON.stringify({
+        model: modelName,
+        stream: false,
+        messages: [{ role: 'user', content: 'Reply with OK.' }],
+        options: {
+          temperature: 0,
+          num_predict: 8,
+        },
+      }),
+    })
+    if (!response.ok) {
+      return null
+    }
+    await response.json()
+    return Date.now() - start
+  } catch {
+    return null
+  } finally {
+    clear()
+  }
+}