New: Unmapped files view (#888)

* New: Unmapped files view

Displays all trackfiles that haven't been matched to a track.
Generalised the file details component and adds it to the album
details screen.

* Add sorting by quality

* New: MediaServiceTests & MediaRepoTests

frontend/src/TrackFile/FileDetailsConnector.js

@@ -0,0 +1,77 @@
+import _ from 'lodash';
+import PropTypes from 'prop-types';
+import React, { Component } from 'react';
+import { connect } from 'react-redux';
+import { createSelector } from 'reselect';
+import getErrorMessage from 'Utilities/Object/getErrorMessage';
+import { fetchTrackFiles } from 'Store/Actions/trackFileActions';
+import FileDetails from './FileDetails';
+import LoadingIndicator from 'Components/Loading/LoadingIndicator';
+
+function createMapStateToProps() {
+  return createSelector(
+    (state) => state.trackFiles,
+    (trackFiles) => {
+      return {
+        ...trackFiles
+      };
+    }
+  );
+}
+
+const mapDispatchToProps = {
+  fetchTrackFiles
+};
+
+class FileDetailsConnector extends Component {
+
+  //
+  // Lifecycle
+
+  componentDidMount() {
+    this.props.fetchTrackFiles({ id: this.props.id });
+  }
+
+  //
+  // Render
+
+  render() {
+    const {
+      items,
+      id,
+      isFetching,
+      error
+    } = this.props;
+
+    const item = _.find(items, { id });
+    const errorMessage = getErrorMessage(error, 'Unable to load manual import items');
+
+    if (isFetching || !item.audioTags) {
+      return (
+        <LoadingIndicator />
+      );
+    } else if (error) {
+      return (
+        <div>{errorMessage}</div>
+      );
+    }
+
+    return (
+      <FileDetails
+        audioTags={item.audioTags}
+        filename={item.path}
+      />
+    );
+
+  }
+}
+
+FileDetailsConnector.propTypes = {
+  fetchTrackFiles: PropTypes.func.isRequired,
+  items: PropTypes.arrayOf(PropTypes.object).isRequired,
+  id: PropTypes.number.isRequired,
+  isFetching: PropTypes.bool.isRequired,
+  error: PropTypes.object
+};
+
+export default connect(createMapStateToProps, mapDispatchToProps)(FileDetailsConnector);