New: Check for available space before grabbing

Closes #7177

frontend/src/Settings/MediaManagement/MediaManagement.js

@@ -210,9 +210,6 @@ class MediaManagement extends Component {
                         />
                       </FormGroup>
 
-                      {
-                        isWindows ?
-                          null :
                       <FormGroup
                         advancedSettings={advancedSettings}
                         isAdvanced={true}
@@ -223,12 +220,11 @@ class MediaManagement extends Component {
                         <FormInputGroup
                           type={inputTypes.CHECK}
                           name="skipFreeSpaceCheckWhenImporting"
-                              helpText={translate('SkipFreeSpaceCheckWhenImportingHelpText')}
+                          helpText={translate('SkipFreeSpaceCheckHelpText')}
                           onChange={onInputChange}
                           {...settings.skipFreeSpaceCheckWhenImporting}
                         />
                       </FormGroup>
-                      }
 
                       <FormGroup
                         advancedSettings={advancedSettings}

src/NzbDrone.Core.Test/DecisionEngineTests/FreeSpaceSpecificationFixture.cs

@@ -0,0 +1,94 @@
+using FluentAssertions;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.DecisionEngine.Specifications;
+using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Test.Framework;
+using NzbDrone.Core.Tv;
+using NzbDrone.Test.Common;
+
+namespace NzbDrone.Core.Test.DecisionEngineTests
+{
+    public class FreeSpaceSpecificationFixture : CoreTest<FreeSpaceSpecification>
+    {
+        private RemoteEpisode _remoteEpisode;
+
+        [SetUp]
+        public void Setup()
+        {
+            _remoteEpisode = new RemoteEpisode() { Release = new ReleaseInfo(), Series = new Series { Path = @"C:\Test\TV\Series".AsOsAgnostic() } };
+        }
+
+        private void WithMinimumFreeSpace(int size)
+        {
+            Mocker.GetMock<IConfigService>().SetupGet(c => c.MinimumFreeSpaceWhenImporting).Returns(size);
+        }
+
+        private void WithAvailableSpace(int size)
+        {
+            Mocker.GetMock<IDiskProvider>().Setup(s => s.GetAvailableSpace(It.IsAny<string>())).Returns(size.Megabytes());
+        }
+
+        private void WithSize(int size)
+        {
+            _remoteEpisode.Release.Size = size.Megabytes();
+        }
+
+        [Test]
+        public void should_return_true_when_available_space_is_more_than_size()
+        {
+            WithMinimumFreeSpace(0);
+            WithAvailableSpace(200);
+            WithSize(100);
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeTrue();
+        }
+
+        [Test]
+        public void should_return_true_when_available_space_minus_size_is_more_than_minimum_free_space()
+        {
+            WithMinimumFreeSpace(50);
+            WithAvailableSpace(200);
+            WithSize(100);
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeTrue();
+        }
+
+        [Test]
+        public void should_return_false_available_space_is_less_than_size()
+        {
+            WithMinimumFreeSpace(0);
+            WithAvailableSpace(200);
+            WithSize(1000);
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeFalse();
+        }
+
+        [Test]
+        public void should_return_false_when_available_space_minus_size_is_less_than_minimum_free_space()
+        {
+            WithMinimumFreeSpace(150);
+            WithAvailableSpace(200);
+            WithSize(100);
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeFalse();
+        }
+
+        [Test]
+        public void should_return_true_if_skip_free_space_check_is_true()
+        {
+            Mocker.GetMock<IConfigService>()
+                .Setup(s => s.SkipFreeSpaceCheckWhenImporting)
+                .Returns(true);
+
+            WithMinimumFreeSpace(150);
+            WithAvailableSpace(200);
+            WithSize(100);
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeTrue();
+        }
+    }
+}

src/NzbDrone.Core/Configuration/ConfigService.cs

@@ -186,6 +186,7 @@ namespace NzbDrone.Core.Configuration
             set { SetValue("DownloadClientHistoryLimit", value); }
         }
 
+        // TODO: Rename to 'Skip Free Space Check'
         public bool SkipFreeSpaceCheckWhenImporting
         {
             get { return GetValueBoolean("SkipFreeSpaceCheckWhenImporting", false); }

src/NzbDrone.Core/DecisionEngine/Specifications/FreeSpaceSpecification.cs

@@ -0,0 +1,66 @@
+using NLog;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.IndexerSearch.Definitions;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.DecisionEngine.Specifications
+{
+    public class FreeSpaceSpecification : IDecisionEngineSpecification
+    {
+        private readonly IConfigService _configService;
+        private readonly IDiskProvider _diskProvider;
+        private readonly Logger _logger;
+
+        public FreeSpaceSpecification(IConfigService configService, IDiskProvider diskProvider, Logger logger)
+        {
+            _configService = configService;
+            _diskProvider = diskProvider;
+            _logger = logger;
+        }
+
+        public SpecificationPriority Priority => SpecificationPriority.Default;
+        public RejectionType Type => RejectionType.Permanent;
+
+        public Decision IsSatisfiedBy(RemoteEpisode subject, SearchCriteriaBase searchCriteria)
+        {
+            if (_configService.SkipFreeSpaceCheckWhenImporting)
+            {
+                _logger.Debug("Skipping free space check");
+                return Decision.Accept();
+            }
+
+            var size = subject.Release.Size;
+            var freeSpace = _diskProvider.GetAvailableSpace(subject.Series.Path);
+
+            if (!freeSpace.HasValue)
+            {
+                _logger.Debug("Unable to get available space for {0}. Skipping", subject.Series.Path);
+
+                return Decision.Accept();
+            }
+
+            var minimumSpace = _configService.MinimumFreeSpaceWhenImporting.Megabytes();
+            var remainingSpace = freeSpace.Value - size;
+
+            if (remainingSpace <= 0)
+            {
+                var message = "Importing after download will exceed available disk space";
+
+                _logger.Debug(message);
+                return Decision.Reject(message);
+            }
+
+            if (remainingSpace < minimumSpace)
+            {
+                var message = $"Not enough free space ({minimumSpace.SizeSuffix()}) to import after download: {remainingSpace.SizeSuffix()}. (Settings: Media Management: Minimum Free Space)";
+
+                _logger.Debug(message);
+                return Decision.Reject(message);
+            }
+
+            return Decision.Accept();
+        }
+    }
+}

src/NzbDrone.Core/Localization/Core/en.json

@@ -1903,7 +1903,7 @@
   "SizeLimit": "Size Limit",
   "SizeOnDisk": "Size on disk",
   "SkipFreeSpaceCheck": "Skip Free Space Check",
-  "SkipFreeSpaceCheckWhenImportingHelpText": "Use when {appName} is unable to detect free space of your root folder during file import",
+  "SkipFreeSpaceCheckHelpText": "Use when {appName} is unable to detect free space of your root folder",
   "SkipRedownload": "Skip Redownload",
   "SkipRedownloadHelpText": "Prevents {appName} from trying to download an alternative release for this item",
   "Small": "Small",