db init in voice agent

self_hosted_env/voice_agent/Dockerfile

@@ -21,4 +21,4 @@ RUN chmod +x wait-for-postgres.sh
 ENTRYPOINT ["/app/wait-for-postgres.sh"]
 
 # This is your application's original startup command
-CMD ["python", "main.py"]
+CMD ["/bin/bash", "-c", "python apply_test_schema.py && python insert_csv_embeddings.py && python main.py"]
\ No newline at end of file

self_hosted_env/voice_agent/apply_test_schema.py

+import psycopg2
+import os
+
+schema_sql = """
+-- Create students table
+CREATE TABLE IF NOT EXISTS students (
+    id SERIAL PRIMARY KEY,
+    student_id VARCHAR(50) UNIQUE NOT NULL,
+    student_name VARCHAR(100),
+    grade VARCHAR(20),
+    language BOOLEAN,
+    nationality VARCHAR(20) NOT NULL DEFAULT 'EGYPTIAN'
+);
+
+-- Create chat_history table
+CREATE TABLE IF NOT EXISTS chat_history (
+    id SERIAL PRIMARY KEY,
+    student_id VARCHAR(50) NOT NULL,
+    role VARCHAR(20) NOT NULL CHECK (role IN ('user', 'assistant', 'system')),
+    content TEXT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (student_id) REFERENCES students(student_id) ON DELETE CASCADE
+);
+
+-- Create indexes for better performance
+CREATE INDEX IF NOT EXISTS idx_chat_history_student_id ON chat_history(student_id);
+CREATE INDEX IF NOT EXISTS idx_chat_history_created_at ON chat_history(created_at);
+CREATE INDEX IF NOT EXISTS idx_students_nationality ON students(nationality);
+
+-- Insert dummy data for testing
+INSERT INTO students (student_id, student_name, grade, language, nationality) VALUES 
+    ('student_001', 'Ahmed Ali', 'prime4', TRUE, 'EGYPTIAN'),
+    ('student_002', 'Sara Hassan', 'prime6', FALSE, 'SAUDI'),
+    ('student_003', 'Mona Adel', 'prime5', TRUE, 'EGYPTIAN'),
+    ('student_004', 'Omar Youssef', 'prime6', FALSE, 'SAUDI')
+ON CONFLICT (student_id) DO NOTHING;
+"""
+
+drop_all_tables_sql = """
+DO $$
+DECLARE
+    rec RECORD;
+BEGIN
+    -- drop all tables in public schema
+    FOR rec IN (SELECT tablename FROM pg_tables WHERE schemaname = 'public') LOOP
+        EXECUTE 'DROP TABLE IF EXISTS "' || rec.tablename || '" CASCADE';
+    END LOOP;
+END $$;
+"""
+
+def setup_database(drop_existing_tables: bool = False):
+    """
+    Sets up the database schema and tables.
+    Args:
+        drop_existing_tables: If True, drops all existing tables before creating them.
+    """
+    try:
+        conn = psycopg2.connect(
+            host=os.getenv("POSTGRES_HOST", "localhost"),
+            port=os.getenv("POSTGRES_PORT", "5432"),
+            user=os.getenv("POSTGRES_USER"),
+            password=os.getenv("POSTGRES_PASSWORD"),
+            dbname=os.getenv("POSTGRES_DB")
+        )
+        conn.autocommit = True
+        
+        with conn.cursor() as cur:
+            if drop_existing_tables:
+                print("Dropping all existing tables...")
+                cur.execute(drop_all_tables_sql)
+                print("All tables dropped.")
+            
+            print("Setting up schema and inserting data...")
+            cur.execute(schema_sql)
+            
+            print("Database setup complete. Verifying data...")
+            
+            # Verifications: Select from students and chat_history tables
+            print("\nStudents table rows:")
+            cur.execute("SELECT * FROM students ORDER BY id;")
+            students = cur.fetchall()
+            for row in students:
+                print(row)
+            
+            print("\nChat_history table rows:")
+            cur.execute("SELECT * FROM chat_history ORDER BY id;")
+            chat_history = cur.fetchall()
+            for row in chat_history:
+                print(row)
+                
+    except psycopg2.OperationalError as e:
+        print(f"Database connection failed: {e}")
+    except Exception as e:
+        print(f"An error occurred: {e}")
+    finally:
+        if 'conn' in locals() and conn:
+            conn.close()
+            print("Database connection closed.")
+
+
+if __name__ == "__main__":
+    # To run with a clean slate, pass True
+    # setup_database(drop_existing_tables=True)
+    
+    # To run without dropping tables (default)
+    setup_database()
\ No newline at end of file

self_hosted_env/voice_agent/insert_csv_embeddings.py

+import os
+import psycopg2
+import pandas as pd
+import json
+from dotenv import load_dotenv
+
+# Import the pgvector adapter for psycopg2
+from pgvector.psycopg2 import register_vector
+
+load_dotenv()
+
+def get_db_connection():
+    conn = psycopg2.connect(
+        dbname=os.getenv("POSTGRES_DB", "embeddings_db"),
+        user=os.getenv("POSTGRES_USER", "db_admin"),
+        password=os.getenv("POSTGRES_PASSWORD"),
+        host=os.getenv("POSTGRES_HOST", "localhost"),
+        port=os.getenv("POSTGRES_PORT", 5432)
+    )
+    # Register the vector type with the connection
+    register_vector(conn)
+    return conn
+
+def create_schema_and_table(conn, drop_existing_table: bool):
+    create_extension = "CREATE EXTENSION IF NOT EXISTS vector;"
+    create_table = """
+    CREATE TABLE IF NOT EXISTS educational_chunks (
+      id SERIAL PRIMARY KEY,
+      grade TEXT NOT NULL,
+      subject TEXT,
+      unit TEXT,
+      concept TEXT,
+      lesson TEXT,
+      from_page INT,
+      to_page INT,
+      chunk_index INT,
+      chunk_text TEXT NOT NULL,
+      is_arabic BOOLEAN NOT NULL,
+      embedding VECTOR(1536) NOT NULL
+    );
+    """
+    create_indexes = [
+        "CREATE INDEX IF NOT EXISTS idx_embedding ON educational_chunks USING hnsw (embedding vector_cosine_ops);",
+        "CREATE INDEX IF NOT EXISTS idx_grade ON educational_chunks (grade);",
+        "CREATE INDEX IF NOT EXISTS idx_is_arabic ON educational_chunks (is_arabic);",
+        "CREATE INDEX IF NOT EXISTS idx_subject ON educational_chunks (subject);",
+        "CREATE INDEX IF NOT EXISTS idx_grade_is_arabic ON educational_chunks (grade, is_arabic);"
+    ]
+
+    cur = conn.cursor()
+    cur.execute(create_extension)
+    print("CREATE EXTENSION vector operation fine.")
+    
+    if drop_existing_table:
+        drop_table = "DROP TABLE IF EXISTS educational_chunks;"
+        cur.execute(drop_table)
+        print("DROP TABLE educational_chunks operation fine.")
+        
+    cur.execute(create_table)
+    print("CREATE TABLE educational_chunks operation fine.")
+    for idx_query in create_indexes:
+        cur.execute(idx_query)
+        print(f"CREATE INDEX operation fine for: {idx_query}")
+    conn.commit()
+    cur.close()
+
+
+def insert_chunks_from_csv(csv_file: str):
+    df = pd.read_csv(csv_file)
+
+    required_cols = [
+        "Grade", "Subject", "Unit", "Concept", "Lesson",
+        "From page", "To page", "Chunk index", "Chunk text",
+        "Is Arabic", "Embedding"
+    ]
+
+    for col in required_cols:
+        if col not in df.columns:
+            raise ValueError(f"Missing required column in CSV: {col}")
+
+    conn = get_db_connection()
+    cur = conn.cursor()
+
+    insert_query = """
+        INSERT INTO educational_chunks
+        (grade, subject, unit, concept, lesson,
+         from_page, to_page, chunk_index, chunk_text,
+         is_arabic, embedding)
+        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+    """
+
+    batch_size = 50
+    buffer = []
+
+    for idx, row in df.iterrows():
+        try:
+            embedding = json.loads(row["Embedding"])
+            buffer.append((
+                str(row["Grade"]),
+                row["Subject"],
+                row.get("Unit"),
+                row.get("Concept"),
+                row.get("Lesson"),
+                int(row["From page"]) if not pd.isna(row["From page"]) else None,
+                int(row["To page"]) if not pd.isna(row["To page"]) else None,
+                int(row["Chunk index"]),
+                row["Chunk text"],
+                bool(row["Is Arabic"]),
+                embedding
+            ))
+        except Exception as e:
+            print(f"Skipping row {idx} due to error: {e}")
+            continue
+
+        if len(buffer) >= batch_size:
+            cur.executemany(insert_query, buffer)
+            conn.commit()
+            print(f"Inserted {len(buffer)} rows. Operation fine.")
+            buffer = []
+
+    if buffer:
+        cur.executemany(insert_query, buffer)
+        conn.commit()
+        print(f"Inserted final {len(buffer)} rows. Operation fine.")
+
+    cur.close()
+    conn.close()
+    print("All data inserted successfully.")
+
+def setup_embeddings_database(drop_existing_tables: bool = False):
+    """
+    Sets up the educational chunks table and populates it with embeddings from CSV files.
+    Args:
+        drop_existing_tables: If True, drops the existing table before creating it.
+    """
+    try:
+        conn = get_db_connection()
+        create_schema_and_table(conn, drop_existing_tables)
+        
+        csv_dir = os.path.join(os.path.dirname(__file__), "embeddings")
+        csv_files = [
+            os.path.join(csv_dir, f)
+            for f in os.listdir(csv_dir)
+            if f.endswith(".csv")
+        ]
+        for file in csv_files:
+            if os.path.exists(file):
+                print(f"Inserting data from {file}...")
+                insert_chunks_from_csv(file)
+            else:
+                print(f"File not found: {file}")
+
+    except psycopg2.OperationalError as e:
+        print(f"Database connection failed: {e}")
+    except Exception as e:
+        print(f"An error occurred: {e}")
+    finally:
+        if 'conn' in locals() and conn:
+            conn.close()
+            print("Database connection closed.")
+
+if __name__ == "__main__":
+    # To run with a clean slate, pass True
+    # setup_embeddings_database(drop_existing_tables=True)
+    
+    # To run without dropping the table (default)
+    setup_embeddings_database()
\ No newline at end of file

self_hosted_env/voice_agent/requirements.txt

@@ -8,3 +8,5 @@ python-multipart
 openai
 psycopg2-binary
 pgvector
+pandas
+python-dotenv