feat: recurring transactions

internal/db/migrations/00015_create_recurring_events_table.sql

@@ -0,0 +1,43 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE recurring_events (
+    id TEXT PRIMARY KEY NOT NULL,
+    space_id TEXT NOT NULL REFERENCES spaces(id) ON DELETE CASCADE,
+    kind TEXT NOT NULL CHECK (kind IN ('bill', 'fund')),
+    source_account_id TEXT NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
+    title TEXT NOT NULL,
+    amount TEXT NOT NULL,
+    description TEXT,
+
+    frequency TEXT NOT NULL CHECK (frequency IN ('daily', 'weekly', 'monthly', 'yearly')),
+    interval_count INTEGER NOT NULL DEFAULT 1 CHECK (interval_count >= 1),
+    day_of_week INTEGER CHECK (day_of_week IS NULL OR (day_of_week >= 0 AND day_of_week <= 6)),
+    day_of_month INTEGER CHECK (day_of_month IS NULL OR (day_of_month >= 1 AND day_of_month <= 31)),
+    month_of_year INTEGER CHECK (month_of_year IS NULL OR (month_of_year >= 1 AND month_of_year <= 12)),
+    fire_hour INTEGER NOT NULL CHECK (fire_hour >= 0 AND fire_hour <= 23),
+    fire_minute INTEGER NOT NULL CHECK (fire_minute >= 0 AND fire_minute <= 59),
+    timezone TEXT NOT NULL,
+
+    next_run_at TIMESTAMP NOT NULL,
+    last_run_at TIMESTAMP,
+    paused BOOLEAN NOT NULL DEFAULT FALSE,
+
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX idx_recurring_events_space_id
+    ON recurring_events (space_id, created_at DESC);
+
+CREATE INDEX idx_recurring_events_due
+    ON recurring_events (next_run_at)
+    WHERE paused = FALSE;
+
+CREATE INDEX idx_recurring_events_source_account
+    ON recurring_events (source_account_id);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE recurring_events;
+-- +goose StatementEnd