From 9b73e5af74e4aa2f6294b59dee7237a2fa75f26f Mon Sep 17 00:00:00 2001
From: Syndamia <kamen.d.mladenov@protonmail.com>
Date: Mon, 29 Mar 2021 16:58:23 +0300
Subject: Added initial implmementation of AddFriend

---
 src/Services/DevHive.Services/Interfaces/IUserService.cs |  2 ++
 src/Services/DevHive.Services/Services/UserService.cs    | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

(limited to 'src/Services')

diff --git a/src/Services/DevHive.Services/Interfaces/IUserService.cs b/src/Services/DevHive.Services/Interfaces/IUserService.cs
index a55f9dd..47948f4 100644
--- a/src/Services/DevHive.Services/Interfaces/IUserService.cs
+++ b/src/Services/DevHive.Services/Interfaces/IUserService.cs
@@ -52,6 +52,8 @@ namespace DevHive.Services.Interfaces
 		/// <returns>The new picture's URL</returns>
 		Task<ProfilePictureServiceModel> UpdateProfilePicture(UpdateProfilePictureServiceModel updateProfilePictureServiceModel);
 
+		Task<bool> AddFriend(Guid id, UpdateFriendServiceModel updateFriendServiceModel);
+
 		/// <summary>
 		/// Deletes a user from the database and removes his data entirely
 		/// Requires authenticated user
diff --git a/src/Services/DevHive.Services/Services/UserService.cs b/src/Services/DevHive.Services/Services/UserService.cs
index 4f74b06..ed8940e 100644
--- a/src/Services/DevHive.Services/Services/UserService.cs
+++ b/src/Services/DevHive.Services/Services/UserService.cs
@@ -143,6 +143,21 @@ namespace DevHive.Services.Services
 		}
 		#endregion
 
+		#region Friends
+		public async Task<bool> AddFriend(Guid id, UpdateFriendServiceModel updateFriendServiceModel)
+		{
+			User user = await this._userRepository.GetByIdAsync(id) ??
+				throw new ArgumentException("Cannot add friend to user, because user does not exist!");
+
+			if (!await this._userRepository.DoesUserExistAsync(updateFriendServiceModel.Id))
+				throw new ArgumentException("Cannot add friend to user, because friend does not exist!");
+
+			await this.CreateRelationToFriends(user, new List<UpdateFriendServiceModel> { updateFriendServiceModel });
+
+			return await this._userRepository.EditAsync(id, user);
+		}
+		#endregion
+
 		#region Delete
 		public async Task<bool> DeleteUser(Guid id)
 		{
-- 
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