New: Collections View

frontend/src/Collection/CollectionItemConnector.js

@@ -0,0 +1,75 @@
+import PropTypes from 'prop-types';
+import React, { Component } from 'react';
+import { connect } from 'react-redux';
+import { createSelector } from 'reselect';
+import createAllMoviesSelector from 'Store/Selectors/createAllMoviesSelector';
+import createCollectionSelector from 'Store/Selectors/createCollectionSelector';
+
+function createMapStateToProps() {
+  return createSelector(
+    createCollectionSelector(),
+    createAllMoviesSelector(),
+    (
+      collection,
+      allMovies
+    ) => {
+      // If a movie is deleted this selector may fire before the parent
+      // selecors, which will result in an undefined movie, if that happens
+      // we want to return early here and again in the render function to avoid
+      // trying to show a movie that has no information available.
+
+      if (!collection) {
+        return {};
+      }
+
+      let allGenres = [];
+      let libraryMovies = 0;
+
+      collection.movies.forEach((movie) => {
+        allGenres = allGenres.concat(movie.genres);
+
+        if (allMovies.find((libraryMovie) => libraryMovie.tmdbId === movie.tmdbId)) {
+          libraryMovies++;
+        }
+      });
+
+      return {
+        ...collection,
+        genres: Array.from(new Set(allGenres)).slice(0, 3),
+        missingMovies: collection.movies.length - libraryMovies
+      };
+    }
+  );
+}
+
+class CollectionItemConnector extends Component {
+
+  //
+  // Render
+
+  render() {
+    const {
+      id,
+      component: ItemComponent,
+      ...otherProps
+    } = this.props;
+
+    if (!id) {
+      return null;
+    }
+
+    return (
+      <ItemComponent
+        {...otherProps}
+        id={id}
+      />
+    );
+  }
+}
+
+CollectionItemConnector.propTypes = {
+  id: PropTypes.number,
+  component: PropTypes.elementType.isRequired
+};
+
+export default connect(createMapStateToProps)(CollectionItemConnector);