First commit

supabase/migrations/003_google_calendar.sql

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+-- Google Calendar integration
+
+-- Store Google Calendar connection per user
+CREATE TABLE IF NOT EXISTS google_calendar_connections (
+  id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE UNIQUE,
+  access_token TEXT NOT NULL,
+  refresh_token TEXT NOT NULL,
+  token_expires_at TIMESTAMPTZ NOT NULL,
+  calendar_id TEXT, -- specific calendar to sync with
+  created_at TIMESTAMPTZ DEFAULT now(),
+  updated_at TIMESTAMPTZ DEFAULT now()
+);
+
+-- Link local events to Google Calendar events
+ALTER TABLE calendar_events ADD COLUMN IF NOT EXISTS google_event_id TEXT;
+ALTER TABLE calendar_events ADD COLUMN IF NOT EXISTS synced_at TIMESTAMPTZ;
+
+-- Index
+CREATE INDEX IF NOT EXISTS idx_google_calendar_user ON google_calendar_connections(user_id);
+CREATE INDEX IF NOT EXISTS idx_calendar_events_google ON calendar_events(google_event_id) WHERE google_event_id IS NOT NULL;
+
+-- RLS
+ALTER TABLE google_calendar_connections ENABLE ROW LEVEL SECURITY;
+
+-- Users can only see/manage their own connections
+CREATE POLICY "Users can view own Google connection" ON google_calendar_connections 
+  FOR SELECT USING (auth.uid() = user_id);
+
+CREATE POLICY "Users can manage own Google connection" ON google_calendar_connections 
+  FOR ALL USING (auth.uid() = user_id);