Remove Service ID from ThirdPartyAuth; query off resource instead.

This de-couples ThirdPartyAuth from Services so we can do auth without having
to instantiate Services.

src/github.com/matrix-org/go-neb/database/db.go

@@ -95,11 +95,12 @@ func (d *ServiceDB) LoadServicesInRoom(serviceUserID, roomID string) (services [
 	return
 }
 
-// LoadThirdPartyAuthsForUser loads all the third-party credentials that the given userID
-// has linked to the given Service. Returns an empty list if there are no credentials.
-func (d *ServiceDB) LoadThirdPartyAuthsForUser(srv types.Service, userID string) (tpas []ThirdPartyAuth, err error) {
+// LoadThirdPartyAuth loads third-party credentials that the given userID
+// has linked to the given resource. Returns sql.ErrNoRows if there are no
+// credentials for the given resource/user combination.
+func (d *ServiceDB) LoadThirdPartyAuth(resource, userID string) (tpa ThirdPartyAuth, err error) {
 	err = runTransaction(d.db, func(txn *sql.Tx) error {
-		tpas, err = selectThirdPartyAuthsForUserTxn(txn, srv.ServiceType(), userID)
+		tpa, err = selectThirdPartyAuthTxn(txn, resource, userID)
 		if err != nil {
 			return err
 		}
@@ -114,27 +115,18 @@ func (d *ServiceDB) LoadThirdPartyAuthsForUser(srv types.Service, userID string)
 // will be inserted. The previous auth is returned.
 func (d *ServiceDB) StoreThirdPartyAuth(tpa ThirdPartyAuth) (old ThirdPartyAuth, err error) {
 	err = runTransaction(d.db, func(txn *sql.Tx) error {
-		var olds []ThirdPartyAuth
-		var hasOld bool
-		olds, err = selectThirdPartyAuthsForUserTxn(txn, tpa.ServiceType, tpa.UserID)
-		for _, o := range olds {
-			if o.UserID == tpa.UserID && o.Resource == tpa.Resource {
-				old = o
-				hasOld = true
-				break
-			}
-		}
+		old, err = selectThirdPartyAuthTxn(txn, tpa.Resource, tpa.UserID)
 		now := time.Now().UnixNano() / 1000000
 
-		if err != nil {
-			return err
-		} else if hasOld {
-			tpa.TimeUpdatedMs = now
-			return updateThirdPartyAuthTxn(txn, tpa)
-		} else {
+		if err == sql.ErrNoRows {
 			tpa.TimeAddedMs = now
 			tpa.TimeUpdatedMs = now
 			return insertThirdPartyAuthTxn(txn, tpa)
+		} else if err != nil {
+			return err
+		} else {
+			tpa.TimeUpdatedMs = now
+			return updateThirdPartyAuthTxn(txn, tpa)
 		}
 	})
 	return

src/github.com/matrix-org/go-neb/database/schema.go

@@ -37,7 +37,6 @@ CREATE TABLE IF NOT EXISTS matrix_clients (
 
 CREATE TABLE IF NOT EXISTS third_party_auth (
 	user_id TEXT NOT NULL,
-	service_type TEXT NOT NULL,
 	resource TEXT NOT NULL,
 	auth_json TEXT NOT NULL,
 	time_added_ms BIGINT NOT NULL,
@@ -216,16 +215,12 @@ func selectRoomServicesTxn(txn *sql.Tx, serviceUserID, roomID string) (serviceID
 type ThirdPartyAuth struct {
 	// The ID of the matrix user who has authed with the third party
 	UserID string
-	// The type of third party. This determines which code gets loaded to
-	// handle parsing of the AuthJSON.
-	ServiceType string
 	// The location of the third party resource e.g. "github.com".
 	// This is mainly relevant for decentralised services like JIRA which
 	// may have many different locations (e.g. "matrix.org/jira") for the
 	// same ServiceType ("jira").
 	Resource string
-	// An opaque JSON blob of stored auth data. Only the service defined in
-	// ServiceType knows how to parse this data.
+	// An opaque JSON blob of stored auth data.
 	AuthJSON []byte
 	// When the row was initially inserted.
 	TimeAddedMs int64
@@ -234,36 +229,26 @@ type ThirdPartyAuth struct {
 }
 
 const selectThirdPartyAuthSQL = `
-SELECT resource, auth_json, time_added_ms, time_updated_ms FROM third_party_auth
-WHERE user_id=$1 AND service_type=$2
+SELECT auth_json, time_added_ms, time_updated_ms FROM third_party_auth
+WHERE user_id=$1 AND resource=$2
 `
 
-func selectThirdPartyAuthsForUserTxn(txn *sql.Tx, serviceType, userID string) (auths []ThirdPartyAuth, err error) {
-	rows, err := txn.Query(selectThirdPartyAuthSQL, userID, serviceType)
-	if err != nil {
-		return
-	}
-	defer rows.Close()
-	for rows.Next() {
-		var tpa ThirdPartyAuth
-		if err = rows.Scan(&tpa.Resource, &tpa.AuthJSON, &tpa.TimeAddedMs, &tpa.TimeUpdatedMs); err != nil {
-			return
-		}
+func selectThirdPartyAuthTxn(txn *sql.Tx, resource, userID string) (tpa ThirdPartyAuth, err error) {
+	tpa.Resource = resource
 	tpa.UserID = userID
-		tpa.ServiceType = serviceType
-		auths = append(auths, tpa)
-	}
+	err = txn.QueryRow(selectThirdPartyAuthSQL, userID, resource).Scan(
+		&tpa.AuthJSON, &tpa.TimeAddedMs, &tpa.TimeUpdatedMs)
 	return
 }
 
 const insertThirdPartyAuthSQL = `
 INSERT INTO third_party_auth(
-	user_id, service_type, resource, auth_json, time_added_ms, time_updated_ms
-) VALUES($1, $2, $3, $4, $5, $6)
+	user_id, resource, auth_json, time_added_ms, time_updated_ms
+) VALUES($1, $2, $3, $4, $5)
 `
 
 func insertThirdPartyAuthTxn(txn *sql.Tx, tpa ThirdPartyAuth) (err error) {
-	_, err = txn.Exec(insertThirdPartyAuthSQL, tpa.UserID, tpa.ServiceType, tpa.Resource,
+	_, err = txn.Exec(insertThirdPartyAuthSQL, tpa.UserID, tpa.Resource,
 		tpa.AuthJSON, tpa.TimeAddedMs, tpa.TimeUpdatedMs)
 	return
 }