New: Add path mapping for partial library updates in Plex Server Notifications

(cherry picked from commit de08d372677052f5dcf9ee689cd48282746bfbec)

src/NzbDrone.Core/Notifications/Plex/Server/PlexServerService.cs

@@ -6,6 +6,7 @@ using System.Text.RegularExpressions;
 using FluentValidation.Results;
 using NLog;
 using NzbDrone.Common.Cache;
+using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Music;
 using NzbDrone.Core.RootFolders;
@@ -101,7 +102,17 @@ namespace NzbDrone.Core.Notifications.Plex.Server
             {
                 foreach (var location in section.Locations)
                 {
-                    if (location.Path.PathEquals(rootFolderPath))
+                    var rootFolder = new OsPath(rootFolderPath);
+                    var mappedPath = rootFolder;
+
+                    if (settings.MapTo.IsNotNullOrWhiteSpace())
+                    {
+                        mappedPath = new OsPath(settings.MapTo) + (rootFolder - new OsPath(settings.MapFrom));
+
+                        _logger.Trace("Mapping Path from {0} to {1} for partial scan", rootFolder, mappedPath);
+                    }
+
+                    if (location.Path.PathEquals(mappedPath.FullPath))
                     {
                         _logger.Debug("Updating matching section location, {0}", location.Path);
                         UpdateSectionPath(artistRelativePath, section, location, settings);

src/NzbDrone.Core/Notifications/Plex/Server/PlexServerSettings.cs

@@ -1,4 +1,5 @@
 using FluentValidation;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Annotations;
 using NzbDrone.Core.ThingiProvider;
 using NzbDrone.Core.Validation;
@@ -11,6 +12,8 @@ namespace NzbDrone.Core.Notifications.Plex.Server
         {
             RuleFor(c => c.Host).ValidHost();
             RuleFor(c => c.Port).InclusiveBetween(1, 65535);
+            RuleFor(c => c.MapFrom).NotEmpty().Unless(c => c.MapTo.IsNullOrWhiteSpace());
+            RuleFor(c => c.MapTo).NotEmpty().Unless(c => c.MapFrom.IsNullOrWhiteSpace());
         }
     }
 
@@ -43,6 +46,12 @@ namespace NzbDrone.Core.Notifications.Plex.Server
         [FieldDefinition(5, Label = "Update Library", Type = FieldType.Checkbox)]
         public bool UpdateLibrary { get; set; }
 
+        [FieldDefinition(6, Label = "Map Paths From", Type = FieldType.Textbox, Advanced = true, HelpText = "Lidarr path, used to modify series paths when Plex sees library path location differently from Lidarr")]
+        public string MapFrom { get; set; }
+
+        [FieldDefinition(7, Label = "Map Paths To", Type = FieldType.Textbox, Advanced = true, HelpText = "Plex path, used to modify series paths when Plex sees library path location differently from Lidarr")]
+        public string MapTo { get; set; }
+
         public bool IsValid => !string.IsNullOrWhiteSpace(Host);
 
         public NzbDroneValidationResult Validate()