feat: add im relationship flows

server/db/mysql/adapter.go

@@ -41,7 +41,7 @@ type adapter struct {
 }
 
 const (
-	adpVersion  = 122
+	adpVersion  = 123
 	adapterName = "mysql"
 
 	defaultDSN      = "root:@tcp(localhost:3306)/tinode?parseTime=true"
@@ -637,6 +637,10 @@ func (a *adapter) CreateDb(reset bool) error {
 		return err
 	}
 
+	if err = createIMRelationTables(tx); err != nil {
+		return err
+	}
+
 	// Deletion log
 	if _, err = tx.Exec(
 		`CREATE TABLE dellog(
@@ -1149,6 +1153,15 @@ func (a *adapter) UpgradeDb() error {
 		}
 	}
 
+	if a.version == 122 {
+		if err := createIMRelationTables(a.db.DB); err != nil {
+			return err
+		}
+		if err := bumpVersion(a, 123); err != nil {
+			return err
+		}
+	}
+
 	if a.version != adpVersion {
 		return errors.New("Failed to perform database upgrade to version " + strconv.Itoa(adpVersion) +
 			". DB is still at " + strconv.Itoa(a.version))
@@ -1208,6 +1221,66 @@ func upgradeIMMessageActions(a *adapter) error {
 	return nil
 }
 
+type sqlExecutor interface {
+	Exec(query string, args ...any) (sql.Result, error)
+}
+
+func createIMRelationTables(exec sqlExecutor) error {
+	statements := []string{
+		`CREATE TABLE im_friend_requests(
+			id               BIGINT NOT NULL AUTO_INCREMENT,
+			tenant_id        BIGINT NOT NULL,
+			request_id       VARCHAR(64) NOT NULL,
+			applicant_id     BIGINT NOT NULL,
+			target_id        BIGINT NOT NULL,
+			message          VARCHAR(200) NOT NULL DEFAULT '',
+			source           VARCHAR(32) NOT NULL DEFAULT '',
+			source_topic     VARCHAR(64) NOT NULL DEFAULT '',
+			status           VARCHAR(16) NOT NULL,
+			idempotency_key  VARCHAR(128) NOT NULL DEFAULT '',
+			expires_at       DATETIME(3) NOT NULL,
+			handled_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_friend_requests_request(tenant_id, request_id),
+			UNIQUE INDEX uk_im_friend_requests_idempotency(tenant_id, applicant_id, idempotency_key),
+			INDEX idx_im_friend_requests_pair(tenant_id, applicant_id, target_id, status, created_at),
+			INDEX idx_im_friend_requests_inbox(tenant_id, target_id, status, created_at),
+			CONSTRAINT fk_im_friend_requests_tenant FOREIGN KEY(tenant_id) REFERENCES im_tenant(id) ON DELETE CASCADE
+		)`,
+		`CREATE TABLE im_friendships(
+			tenant_id   BIGINT NOT NULL,
+			user_id     BIGINT NOT NULL,
+			peer_id     BIGINT NOT NULL,
+			status      VARCHAR(16) NOT NULL,
+			remark      VARCHAR(64) NOT NULL DEFAULT '',
+			topic       CHAR(25) NOT NULL DEFAULT '',
+			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(tenant_id, user_id, peer_id),
+			INDEX idx_im_friendships_peer(tenant_id, peer_id, status),
+			CONSTRAINT fk_im_friendships_tenant FOREIGN KEY(tenant_id) REFERENCES im_tenant(id) ON DELETE CASCADE
+		)`,
+		`CREATE TABLE im_user_blocks(
+			tenant_id   BIGINT NOT NULL,
+			blocker_id  BIGINT NOT NULL,
+			blocked_id  BIGINT NOT NULL,
+			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(tenant_id, blocker_id, blocked_id),
+			INDEX idx_im_user_blocks_blocked(tenant_id, blocked_id),
+			CONSTRAINT fk_im_user_blocks_tenant FOREIGN KEY(tenant_id) REFERENCES im_tenant(id) ON DELETE CASCADE
+		)`,
+	}
+	for _, stmt := range statements {
+		if _, err := exec.Exec(stmt); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func createIMSecurityTables(tx *sql.Tx) error {
 	if _, err := tx.Exec(
 		`CREATE TABLE im_realname_verifications(