feat: add AI-powered finance and project risk analysis features with pgvector support for RAG embeddings

lib/ai/embeddings.ts

@@ -0,0 +1,72 @@
+import { embed } from 'ai';
+import { createOpenAI } from '@ai-sdk/openai';
+import { createGoogleGenerativeAI } from '@ai-sdk/google';
+import { createClient } from '@/lib/supabase/server';
+
+export async function generateEmbedding(text: string, provider: string, apiKey: string) {
+  let embeddingModel;
+
+  if (provider === 'google' && apiKey) {
+    const google = createGoogleGenerativeAI({ apiKey });
+    embeddingModel = google.textEmbeddingModel('text-embedding-004');
+  } else if (apiKey) {
+    const openai = createOpenAI({ apiKey });
+    embeddingModel = openai.embedding('text-embedding-3-small');
+  } else {
+    throw new Error('Geçerli bir API Anahtarı bulunamadı.');
+  }
+
+  const { embedding } = await embed({
+    model: embeddingModel,
+    value: text,
+  });
+
+  return embedding;
+}
+
+export async function saveDocumentEmbedding(
+  userId: string,
+  content: string,
+  metadata: Record<string, any>,
+  provider: string,
+  apiKey: string
+) {
+  const embedding = await generateEmbedding(content, provider, apiKey);
+  const supabase = await createClient();
+
+  const { error } = await supabase.from('document_embeddings').insert({
+    user_id: userId,
+    content,
+    metadata,
+    embedding,
+  });
+
+  if (error) {
+    console.error('Embedding kayıt hatası:', error);
+    throw new Error('Embedding kaydedilemedi.');
+  }
+}
+
+export async function searchSimilarDocuments(
+  userId: string,
+  query: string,
+  provider: string,
+  apiKey: string,
+  matchCount: number = 5
+) {
+  const queryEmbedding = await generateEmbedding(query, provider, apiKey);
+  const supabase = await createClient();
+
+  const { data, error } = await supabase.rpc('match_documents', {
+    query_embedding: queryEmbedding,
+    match_count: matchCount,
+    filter_user_id: userId,
+  });
+
+  if (error) {
+    console.error('Vektör arama hatası:', error);
+    return [];
+  }
+
+  return data;
+}