Add database migrations

Author: Gerome El-assaad

migrations/create_tasks_table.sql

@@ -0,0 +1,70 @@
+-- Create tasks table for CodinIT.dev task management
+-- This table stores background tasks with progress tracking and logs
+
+CREATE TABLE IF NOT EXISTS tasks (
+  id TEXT PRIMARY KEY,
+  user_id TEXT REFERENCES auth.users(id) ON DELETE CASCADE,
+  status TEXT NOT NULL CHECK (status IN ('pending', 'processing', 'completed', 'error')) DEFAULT 'pending',
+  progress INTEGER NOT NULL DEFAULT 0 CHECK (progress >= 0 AND progress <= 100),
+  prompt TEXT NOT NULL,
+  repo_url TEXT,
+  selected_agent TEXT DEFAULT 'claude',
+  selected_model TEXT,
+  sandbox_url TEXT,
+  branch_name TEXT,
+  logs TEXT DEFAULT '[]', -- JSON array of log entries
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Create indexes for better query performance
+CREATE INDEX IF NOT EXISTS idx_tasks_user_id ON tasks(user_id);
+CREATE INDEX IF NOT EXISTS idx_tasks_status ON tasks(status);
+CREATE INDEX IF NOT EXISTS idx_tasks_created_at ON tasks(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_tasks_user_status ON tasks(user_id, status);
+
+-- Create updated_at trigger to automatically update the timestamp
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+CREATE TRIGGER update_tasks_updated_at
+    BEFORE UPDATE ON tasks
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- Enable Row Level Security (RLS)
+ALTER TABLE tasks ENABLE ROW LEVEL SECURITY;
+
+-- Create RLS policies
+-- Users can only see their own tasks
+CREATE POLICY "Users can view their own tasks"
+    ON tasks
+    FOR SELECT
+    USING (auth.uid() = user_id::uuid);
+
+-- Users can only insert their own tasks
+CREATE POLICY "Users can insert their own tasks"
+    ON tasks
+    FOR INSERT
+    WITH CHECK (auth.uid() = user_id::uuid);
+
+-- Users can only update their own tasks
+CREATE POLICY "Users can update their own tasks"
+    ON tasks
+    FOR UPDATE
+    USING (auth.uid() = user_id::uuid);
+
+-- Users can only delete their own tasks
+CREATE POLICY "Users can delete their own tasks"
+    ON tasks
+    FOR DELETE
+    USING (auth.uid() = user_id::uuid);
+
+-- Grant necessary permissions
+GRANT ALL ON tasks TO authenticated;
+GRANT ALL ON tasks TO service_role;