[#276] added support for linking external auths by provider id

migrations/1661586591_add_externalAuths_table.go

@@ -0,0 +1,76 @@
+package migrations
+
+import "github.com/pocketbase/dbx"
+
+func init() {
+	AppMigrations.Register(func(db dbx.Builder) error {
+		_, createErr := db.NewQuery(`
+			CREATE TABLE {{_externalAuths}} (
+				[[id]]         TEXT PRIMARY KEY,
+				[[userId]]     TEXT NOT NULL,
+				[[provider]]   TEXT NOT NULL,
+				[[providerId]] TEXT NOT NULL,
+				[[created]]    TEXT DEFAULT "" NOT NULL,
+				[[updated]]    TEXT DEFAULT "" NOT NULL,
+				---
+				FOREIGN KEY ([[userId]]) REFERENCES {{_users}} ([[id]]) ON UPDATE CASCADE ON DELETE CASCADE
+			);
+
+			CREATE UNIQUE INDEX _externalAuths_userId_provider_idx on {{_externalAuths}} ([[userId]], [[provider]]);
+			CREATE UNIQUE INDEX _externalAuths_provider_providerId_idx on {{_externalAuths}} ([[provider]], [[providerId]]);
+		`).Execute()
+		if createErr != nil {
+			return createErr
+		}
+
+		// remove the unique email index from the _users table and
+		// replace it with partial index
+		_, alterErr := db.NewQuery(`
+			-- crate new users table
+			CREATE TABLE {{_newUsers}} (
+				[[id]]                     TEXT PRIMARY KEY,
+				[[verified]]               BOOLEAN DEFAULT FALSE NOT NULL,
+				[[email]]                  TEXT DEFAULT "" NOT NULL,
+				[[tokenKey]]               TEXT NOT NULL,
+				[[passwordHash]]           TEXT NOT NULL,
+				[[lastResetSentAt]]        TEXT DEFAULT "" NOT NULL,
+				[[lastVerificationSentAt]] TEXT DEFAULT "" NOT NULL,
+				[[created]]                TEXT DEFAULT "" NOT NULL,
+				[[updated]]                TEXT DEFAULT "" NOT NULL
+			);
+
+			-- copy all data from the old users table to the new one
+			INSERT INTO {{_newUsers}} SELECT * FROM {{_users}};
+
+			-- drop old table
+			DROP TABLE {{_users}};
+
+			-- rename new table
+			ALTER TABLE {{_newUsers}} RENAME TO {{_users}};
+
+			-- create named indexes
+			CREATE UNIQUE INDEX _users_email_idx ON {{_users}} ([[email]]) WHERE [[email]] != "";
+			CREATE UNIQUE INDEX _users_tokenKey_idx ON {{_users}} ([[tokenKey]]);
+		`).Execute()
+		if alterErr != nil {
+			return alterErr
+		}
+
+		return nil
+	}, func(db dbx.Builder) error {
+		if _, err := db.DropTable("_externalAuths").Execute(); err != nil {
+			return err
+		}
+
+		// drop the partial email unique index and replace it with normal unique index
+		_, indexErr := db.NewQuery(`
+			DROP INDEX IF EXISTS _users_email_idx;
+			CREATE UNIQUE INDEX _users_email_idx on {{_users}} ([[email]]);
+		`).Execute()
+		if indexErr != nil {
+			return indexErr
+		}
+
+		return nil
+	})
+}