Merge pull request #158 from crupest/dev

Develop new features of back end.

1 files changed, 61 insertions, 1 deletions

diff --git a/Timeline/Services/TimelineService.cs b/Timeline/Services/TimelineService.cs
index 01f7f5fd..4bcae596 100644
--- a/Timeline/Services/TimelineService.cs
+++ b/Timeline/Services/TimelineService.cs
@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;

 using System.Globalization;

 using System.Linq;

+using System.Threading;

 using System.Threading.Tasks;

 using Timeline.Entities;

 using Timeline.Helpers;

@@ -357,6 +358,21 @@ namespace Timeline.Services
         /// <exception cref="ArgumentException">Thrown when timeline name is invalid.</exception>

         /// <exception cref="TimelineNotExistException">Thrown when the timeline does not exist.</exception>

         Task DeleteTimeline(string timelineName);

+

+        /// <summary>

+        /// Change name of a timeline.

+        /// </summary>

+        /// <param name="oldTimelineName">The old timeline name.</param>

+        /// <param name="newTimelineName">The new timeline name.</param>

+        /// <returns>The new timeline info.</returns>

+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="oldTimelineName"/> or <paramref name="newTimelineName"/> is null.</exception>

+        /// <exception cref="ArgumentException">Thrown when <paramref name="oldTimelineName"/> or <paramref name="newTimelineName"/> is of invalid format.</exception>

+        /// <exception cref="TimelineNotExistException">Thrown when timeline does not exist.</exception>

+        /// <exception cref="EntityAlreadyExistException">Thrown when a timeline with new name already exists.</exception>

+        /// <remarks>

+        /// You can only change name of general timeline.

+        /// </remarks>

+        Task<Models.Timeline> ChangeTimelineName(string oldTimelineName, string newTimelineName);

     }

 

     public class TimelineService : ITimelineService

@@ -395,6 +411,7 @@ namespace Timeline.Services
             }

         }

 

+        /// Remember to include Members when query.

         private async Task<Models.Timeline> MapTimelineFromEntity(TimelineEntity entity)

         {

             var owner = await _userService.GetUserById(entity.OwnerId);

@@ -405,11 +422,14 @@ namespace Timeline.Services
                 members.Add(await _userService.GetUserById(memberEntity.UserId));

             }

 

+            var name = entity.Name ?? ("@" + owner.Username);

+

             return new Models.Timeline

             {

                 UniqueID = entity.UniqueId,

-                Name = entity.Name ?? ("@" + owner.Username),

+                Name = name,

                 NameLastModified = entity.NameLastModified,

+                Title = string.IsNullOrEmpty(entity.Title) ? name : entity.Title,

                 Description = entity.Description ?? "",

                 Owner = owner,

                 Visibility = entity.Visibility,

@@ -834,6 +854,12 @@ namespace Timeline.Services
 

             var changed = false;

 

+            if (newProperties.Title != null)

+            {

+                changed = true;

+                timelineEntity.Title = newProperties.Title;

+            }

+

             if (newProperties.Description != null)

             {

                 changed = true;

@@ -1102,5 +1128,39 @@ namespace Timeline.Services
             _database.Timelines.Remove(entity);

             await _database.SaveChangesAsync();

         }

+

+        public async Task<Models.Timeline> ChangeTimelineName(string oldTimelineName, string newTimelineName)

+        {

+            if (oldTimelineName == null)

+                throw new ArgumentNullException(nameof(oldTimelineName));

+            if (newTimelineName == null)

+                throw new ArgumentNullException(nameof(newTimelineName));

+

+            ValidateTimelineName(oldTimelineName, nameof(oldTimelineName));

+            ValidateTimelineName(newTimelineName, nameof(newTimelineName));

+

+            var entity = await _database.Timelines.Include(t => t.Members).Where(t => t.Name == oldTimelineName).SingleOrDefaultAsync();

+

+            if (entity == null)

+                throw new TimelineNotExistException(oldTimelineName);

+

+            if (oldTimelineName == newTimelineName)

+                return await MapTimelineFromEntity(entity);

+

+            var conflict = await _database.Timelines.AnyAsync(t => t.Name == newTimelineName);

+

+            if (conflict)

+                throw new EntityAlreadyExistException(EntityNames.Timeline, null, ExceptionTimelineNameConflict);

+

+            var now = _clock.GetCurrentTime();

+

+            entity.Name = newTimelineName;

+            entity.NameLastModified = now;

+            entity.LastModified = now;

+

+            await _database.SaveChangesAsync();

+

+            return await MapTimelineFromEntity(entity);

+        }

     }

 }