Add get followers

service/database/database.go

@@ -34,6 +34,8 @@ import (
 	"database/sql"
 	"errors"
 	"fmt"
+
+	"github.com/notherealmarco/WASAPhoto/service/structures"
 )
 
 // AppDatabase is the high level interface for the DB
@@ -42,6 +44,7 @@ type AppDatabase interface {
 	GetUserID(name string) (string, error)
 	UpdateUsername(uid, name string) error
 	CreateUser(name string) (string, error)
+	GetUserFollowers(uid string) ([]structures.UIDName, error)
 	FollowUser(uid string, follow string) error
 	UnfollowUser(uid string, unfollow string) error
 	BanUser(uid string, ban string) error

service/database/db-users.go

@@ -3,6 +3,7 @@ package database
 import (
 	"github.com/gofrs/uuid"
 	"github.com/notherealmarco/WASAPhoto/service/database/db_errors"
+	"github.com/notherealmarco/WASAPhoto/service/structures"
 )
 
 //Check if user exists and if exists return the user id by username
@@ -44,6 +45,28 @@ func (db *appdbimpl) UpdateUsername(uid string, name string) error {
 	return err
 }
 
+// Get user followers
+func (db *appdbimpl) GetUserFollowers(uid string) ([]structures.UIDName, error) {
+	rows, err := db.c.Query(`SELECT "follower", "user.name" FROM "follows", "users"
+							WHERE "follows.follower" = "users.uid"
+							AND "followed" = ?`, uid)
+	if err != nil {
+		return nil, err
+	}
+
+	var followers []structures.UIDName = make([]structures.UIDName, 0)
+	for rows.Next() {
+		var uid string
+		var name string
+		err = rows.Scan(&uid, &name)
+		if err != nil {
+			return nil, err
+		}
+		followers = append(followers, structures.UIDName{UID: uid, Name: name})
+	}
+	return followers, nil
+}
+
 // Follow a user
 func (db *appdbimpl) FollowUser(uid string, follow string) error {
 	_, err := db.c.Exec(`INSERT INTO "follows" ("follower", "followed") VALUES (?, ?)`, uid, follow)