change db driver

internal/db/migrations/20250424200609_initial.sql

@@ -0,0 +1,98 @@
+-- +goose Up
+-- +goose StatementBegin
+-- Sessions
+CREATE TABLE IF NOT EXISTS sessions (
+    id TEXT PRIMARY KEY,
+    parent_session_id TEXT,
+    title TEXT NOT NULL,
+    message_count INTEGER NOT NULL DEFAULT 0 CHECK (message_count >= 0),
+    prompt_tokens  INTEGER NOT NULL DEFAULT 0 CHECK (prompt_tokens >= 0),
+    completion_tokens  INTEGER NOT NULL DEFAULT 0 CHECK (completion_tokens>= 0),
+    cost REAL NOT NULL DEFAULT 0.0 CHECK (cost >= 0.0),
+    updated_at INTEGER NOT NULL,  -- Unix timestamp in milliseconds
+    created_at INTEGER NOT NULL   -- Unix timestamp in milliseconds
+);
+
+CREATE TRIGGER IF NOT EXISTS update_sessions_updated_at
+AFTER UPDATE ON sessions
+BEGIN
+UPDATE sessions SET updated_at = strftime('%s', 'now')
+WHERE id = new.id;
+END;
+
+-- Files
+CREATE TABLE IF NOT EXISTS files (
+    id TEXT PRIMARY KEY,
+    session_id TEXT NOT NULL,
+    path TEXT NOT NULL,
+    content TEXT NOT NULL,
+    version TEXT NOT NULL,
+    created_at INTEGER NOT NULL,  -- Unix timestamp in milliseconds
+    updated_at INTEGER NOT NULL,  -- Unix timestamp in milliseconds
+    FOREIGN KEY (session_id) REFERENCES sessions (id) ON DELETE CASCADE,
+    UNIQUE(path, session_id, version)
+);
+
+CREATE INDEX IF NOT EXISTS idx_files_session_id ON files (session_id);
+CREATE INDEX IF NOT EXISTS idx_files_path ON files (path);
+
+CREATE TRIGGER IF NOT EXISTS update_files_updated_at
+AFTER UPDATE ON files
+BEGIN
+UPDATE files SET updated_at = strftime('%s', 'now')
+WHERE id = new.id;
+END;
+
+-- Messages
+CREATE TABLE IF NOT EXISTS messages (
+    id TEXT PRIMARY KEY,
+    session_id TEXT NOT NULL,
+    role TEXT NOT NULL,
+    parts TEXT NOT NULL default '[]',
+    model TEXT,
+    created_at INTEGER NOT NULL,  -- Unix timestamp in milliseconds
+    updated_at INTEGER NOT NULL,  -- Unix timestamp in milliseconds
+    finished_at INTEGER,  -- Unix timestamp in milliseconds
+    FOREIGN KEY (session_id) REFERENCES sessions (id) ON DELETE CASCADE
+);
+
+CREATE INDEX IF NOT EXISTS idx_messages_session_id ON messages (session_id);
+
+CREATE TRIGGER IF NOT EXISTS update_messages_updated_at
+AFTER UPDATE ON messages
+BEGIN
+UPDATE messages SET updated_at = strftime('%s', 'now')
+WHERE id = new.id;
+END;
+
+CREATE TRIGGER IF NOT EXISTS update_session_message_count_on_insert
+AFTER INSERT ON messages
+BEGIN
+UPDATE sessions SET
+    message_count = message_count + 1
+WHERE id = new.session_id;
+END;
+
+CREATE TRIGGER IF NOT EXISTS update_session_message_count_on_delete
+AFTER DELETE ON messages
+BEGIN
+UPDATE sessions SET
+    message_count = message_count - 1
+WHERE id = old.session_id;
+END;
+
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TRIGGER IF EXISTS update_sessions_updated_at;
+DROP TRIGGER IF EXISTS update_messages_updated_at;
+DROP TRIGGER IF EXISTS update_files_updated_at;
+
+DROP TRIGGER IF EXISTS update_session_message_count_on_delete;
+DROP TRIGGER IF EXISTS update_session_message_count_on_insert;
+
+DROP TABLE IF EXISTS sessions;
+DROP TABLE IF EXISTS messages;
+DROP TABLE IF EXISTS files;
+-- +goose StatementEnd