feat: add chapter eight call records

scripts/apply_hotgo_tenant_db.go

@@ -57,6 +57,29 @@ func main() {
 			CONSTRAINT fk_im_tenant_config_tenant FOREIGN KEY(tenant_id) REFERENCES hotgo.im_tenant(id) ON DELETE CASCADE
 		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci`,
 		"CREATE DATABASE IF NOT EXISTS tinode CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci",
+		`CREATE TABLE IF NOT EXISTS tinode.im_call_records(
+			id          BIGINT NOT NULL AUTO_INCREMENT,
+			call_id     VARCHAR(64) NOT NULL,
+			topic       CHAR(25) NOT NULL,
+			seq_id      INT NOT NULL,
+			caller_id   BIGINT NOT NULL,
+			callee_id   BIGINT NOT NULL,
+			call_type   VARCHAR(16) NOT NULL,
+			status      VARCHAR(32) NOT NULL,
+			end_reason  VARCHAR(64) NOT NULL DEFAULT '',
+			duration_ms BIGINT NOT NULL DEFAULT 0,
+			started_at  DATETIME(3) NOT NULL,
+			accepted_at DATETIME(3),
+			finished_at DATETIME(3),
+			created_at  DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+			updated_at  DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+			PRIMARY KEY(id),
+			UNIQUE INDEX uk_im_call_records_call(call_id),
+			UNIQUE INDEX uk_im_call_records_topic_seq(topic, seq_id),
+			INDEX idx_im_call_records_caller(caller_id, id DESC),
+			INDEX idx_im_call_records_callee(callee_id, id DESC),
+			INDEX idx_im_call_records_status(status, updated_at)
+		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci`,
 	}
 	for _, stmt := range statements {
 		if _, err = db.Exec(stmt); err != nil {
@@ -88,6 +111,9 @@ func main() {
 	if _, err = db.Exec("UPDATE tinode.im_tenant SET db_name='tinode' WHERE code='default' AND (db_name='' OR db_name IS NULL)"); err != nil {
 		fatal(err)
 	}
+	if err = dropTenantIDColumns(db, "tinode"); err != nil {
+		fatal(err)
+	}
 
 	var code, dbName string
 	var state int
@@ -101,9 +127,107 @@ func main() {
 		fatal(err)
 	}
 	fmt.Printf("tinode.im_tenant routing columns: %d/3\n", columnCount)
+
+	rows, err := db.Query(`SELECT table_name FROM information_schema.COLUMNS
+		WHERE TABLE_SCHEMA='tinode' AND COLUMN_NAME='tenant_id'
+		ORDER BY table_name`)
+	if err != nil {
+		fatal(err)
+	}
+	defer rows.Close()
+	var tables []string
+	for rows.Next() {
+		var table string
+		if err = rows.Scan(&table); err != nil {
+			fatal(err)
+		}
+		tables = append(tables, table)
+	}
+	if err = rows.Err(); err != nil {
+		fatal(err)
+	}
+	if len(tables) == 0 {
+		fmt.Println("tinode tenant_id columns: none")
+	} else {
+		fmt.Printf("tinode tenant_id columns: %s\n", strings.Join(tables, ","))
+	}
 }
 
 func fatal(v any) {
 	fmt.Fprintln(os.Stderr, v)
 	os.Exit(1)
 }
+
+func dropTenantIDColumns(db *sql.DB, schema string) error {
+	fks, err := queryPairs(db, `SELECT DISTINCT table_name, constraint_name
+		FROM information_schema.KEY_COLUMN_USAGE
+		WHERE TABLE_SCHEMA=? AND COLUMN_NAME='tenant_id' AND REFERENCED_TABLE_NAME IS NOT NULL`,
+		schema)
+	if err != nil {
+		return err
+	}
+	for _, fk := range fks {
+		if _, err = db.Exec("ALTER TABLE " + quoteIdent(schema) + "." + quoteIdent(fk[0]) + " DROP FOREIGN KEY " + quoteIdent(fk[1])); err != nil {
+			return fmt.Errorf("drop foreign key %s.%s: %w", fk[0], fk[1], err)
+		}
+	}
+
+	indexes, err := queryPairs(db, `SELECT DISTINCT table_name, index_name
+		FROM information_schema.STATISTICS
+		WHERE TABLE_SCHEMA=? AND COLUMN_NAME='tenant_id' AND INDEX_NAME<>'PRIMARY'`,
+		schema)
+	if err != nil {
+		return err
+	}
+	for _, idx := range indexes {
+		if _, err = db.Exec("ALTER TABLE " + quoteIdent(schema) + "." + quoteIdent(idx[0]) + " DROP INDEX " + quoteIdent(idx[1])); err != nil {
+			return fmt.Errorf("drop index %s.%s: %w", idx[0], idx[1], err)
+		}
+	}
+
+	rows, err := db.Query(`SELECT table_name FROM information_schema.COLUMNS
+		WHERE TABLE_SCHEMA=? AND COLUMN_NAME='tenant_id'
+		ORDER BY table_name`, schema)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+	var tables []string
+	for rows.Next() {
+		var table string
+		if err = rows.Scan(&table); err != nil {
+			return err
+		}
+		tables = append(tables, table)
+	}
+	if err = rows.Err(); err != nil {
+		return err
+	}
+	for _, table := range tables {
+		if _, err = db.Exec("ALTER TABLE " + quoteIdent(schema) + "." + quoteIdent(table) + " DROP COLUMN tenant_id"); err != nil {
+			return fmt.Errorf("drop column %s.tenant_id: %w", table, err)
+		}
+	}
+	return nil
+}
+
+func queryPairs(db *sql.DB, query string, args ...any) ([][2]string, error) {
+	rows, err := db.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var pairs [][2]string
+	for rows.Next() {
+		var first, second string
+		if err = rows.Scan(&first, &second); err != nil {
+			return nil, err
+		}
+		pairs = append(pairs, [2]string{first, second})
+	}
+	return pairs, rows.Err()
+}
+
+func quoteIdent(name string) string {
+	return "`" + strings.ReplaceAll(name, "`", "``") + "`"
+}