If we don't know the Plex agent, then see if it's a ImdbId, if it's not check the string for any episode and season hints #2695

src/Ombi.Helpers.Tests/Ombi.Helpers.Tests.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nunit" Version="3.11.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.11.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Ombi.Helpers\Ombi.Helpers.csproj" />
+  </ItemGroup>
+
+</Project>

src/Ombi.Helpers.Tests/PlexHelperTests.cs

@@ -0,0 +1,52 @@
+using System;
+using NUnit.Framework;
+using System.Collections.Generic;
+
+namespace Ombi.Helpers.Tests
+{
+    [TestFixture]
+    public class PlexHelperTests
+    {
+
+        [TestCaseSource(nameof(ProviderIdGuidData))]
+        public string GetProviderIdFromPlexGuidTests(string guidInput, ProviderIdType type)
+        {
+            var result = PlexHelper.GetProviderIdFromPlexGuid(guidInput);
+
+            switch (type)
+            {
+                case ProviderIdType.Imdb:
+                    Assert.That(result.ImdbId, Is.Not.Null);
+                    return result.ImdbId;
+                case ProviderIdType.TvDb:
+                    Assert.That(result.TheTvDb, Is.Not.Null);
+                    return result.TheTvDb;
+                case ProviderIdType.MovieDb:
+                    Assert.That(result.TheMovieDb, Is.Not.Null);
+                    return result.TheMovieDb;
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(type), type, null);
+            }
+        }
+
+        public static IEnumerable<TestCaseData> ProviderIdGuidData
+        {
+            get
+            {
+                yield return new TestCaseData("com.plexapp.agents.thetvdb://269586/2/8?lang=en", ProviderIdType.TvDb).Returns("269586").SetName("Regular TvDb Id");
+                yield return new TestCaseData("com.plexapp.agents.themoviedb://390043?lang=en", ProviderIdType.MovieDb).Returns("390043").SetName("Regular MovieDb Id");
+                yield return new TestCaseData("com.plexapp.agents.imdb://tt2543164?lang=en", ProviderIdType.Imdb).Returns("tt2543164").SetName("Regular Imdb Id");
+                yield return new TestCaseData("com.plexapp.agents.agent47://tt2543456?lang=en", ProviderIdType.Imdb).Returns("tt2543456").SetName("Unknown IMDB agent");
+                yield return new TestCaseData("com.plexapp.agents.agent47://456822/1/1?lang=en", ProviderIdType.TvDb).Returns("456822").SetName("Unknown TvDb agent");
+                yield return new TestCaseData("com.plexapp.agents.agent47://456822/999/999?lang=en", ProviderIdType.TvDb).Returns("456822").SetName("Unknown TvDb agent, large episode and season");
+            }
+        }
+
+        public enum ProviderIdType
+        {
+            Imdb,
+            TvDb,
+            MovieDb
+        }
+    }
+}

src/Ombi.Helpers/PlexHelper.cs

@@ -27,12 +27,15 @@
 
 using System;
 using System.Globalization;
+using System.Text.RegularExpressions;
 
 namespace Ombi.Helpers
 {
     public class PlexHelper
     {
-       
+        private  const string ImdbMatchExpression = "tt([0-9]{1,10})";
+        private  const string TvDbIdMatchExpression = "//[0-9]+/([0-9]{1,3})/([0-9]{1,3})";
+
         public static ProviderId GetProviderIdFromPlexGuid(string guid)
         {
             //com.plexapp.agents.thetvdb://269586/2/8?lang=en
@@ -52,7 +55,7 @@ namespace Ombi.Helpers
                     {
                         TheTvDb = guidSplit[1]
                     };
-                }
+                } else
                 if (guid.Contains("themoviedb", CompareOptions.IgnoreCase))
                 {
                     return new ProviderId
@@ -60,6 +63,7 @@ namespace Ombi.Helpers
                         TheMovieDb = guidSplit[1]
                     };
                 }
+                else
                 if (guid.Contains("imdb", CompareOptions.IgnoreCase))
                 {
                     return new ProviderId
@@ -67,6 +71,31 @@ namespace Ombi.Helpers
                         ImdbId = guidSplit[1]
                     };
                 }
+                else
+                {
+                    var imdbRegex = new Regex(ImdbMatchExpression, RegexOptions.Compiled);
+                    var tvdbRegex = new Regex(TvDbIdMatchExpression, RegexOptions.Compiled);
+                    var imdbMatch = imdbRegex.IsMatch(guid);
+                    if (imdbMatch)
+                    {
+                        return new ProviderId
+                        {
+                            ImdbId = guidSplit[1]
+                        };
+                    }
+                    else
+                    {
+                        // Check if it matches the TvDb pattern
+                        var tvdbMatch = tvdbRegex.IsMatch(guid);
+                        if (tvdbMatch)
+                        {
+                            return new ProviderId
+                            {
+                                TheTvDb = guidSplit[1]
+                            };
+                        }
+                    }
+                }
             }
             return new ProviderId();
         }

src/Ombi.sln

@@ -94,7 +94,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ombi.Api.SickRage", "Ombi.A
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ombi.Api.Notifications", "Ombi.Api.Notifications\Ombi.Api.Notifications.csproj", "{10D1FE9D-9124-42B7-B1E1-CEB99B832618}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ombi.Api.Lidarr", "Ombi.Api.Lidarr\Ombi.Api.Lidarr.csproj", "{4FA21A20-92F4-462C-B929-2C517A88CC56}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ombi.Api.Lidarr", "Ombi.Api.Lidarr\Ombi.Api.Lidarr.csproj", "{4FA21A20-92F4-462C-B929-2C517A88CC56}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ombi.Helpers.Tests", "Ombi.Helpers.Tests\Ombi.Helpers.Tests.csproj", "{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -250,6 +252,10 @@ Global
 		{4FA21A20-92F4-462C-B929-2C517A88CC56}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4FA21A20-92F4-462C-B929-2C517A88CC56}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4FA21A20-92F4-462C-B929-2C517A88CC56}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -286,6 +292,7 @@ Global
 		{94C9A366-2595-45EA-AABB-8E4A2E90EC5B} = {9293CA11-360A-4C20-A674-B9E794431BF5}
 		{10D1FE9D-9124-42B7-B1E1-CEB99B832618} = {9293CA11-360A-4C20-A674-B9E794431BF5}
 		{4FA21A20-92F4-462C-B929-2C517A88CC56} = {9293CA11-360A-4C20-A674-B9E794431BF5}
+		{CC8CEFCD-0CB6-45BB-845F-508BCAB5BDC3} = {6F42AB98-9196-44C4-B888-D5E409F415A1}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {192E9BF8-00B4-45E4-BCCC-4C215725C869}