Shows diagram for a movie in a movie pilot page.

moviePilotRatingAnalyser.js

var moviePilotRatingAnalyser = {
	movieId: function () {
		return jQuery("[data-type='Movie']").data('id');
	},
	ratings: function () {
		return this.ratingData.map(function (rating) {
			return rating.value || 0;
		});
	},
	average: function () {
		var ratings = this.ratings();
		return ratings.reduce(function (a, b) {
			return a + b;
		}) / ratings.length / 10;
	},
	median: function () {
		var ratings = this.ratings();
		ratings.sort();
		return ratings[Math.round(ratings.length / 2)] / 10;
	},
	countRatings: function () {
		var countedRatings = {
			max: 0
		};

		this.ratings().forEach(function (rating) {
			if (!countedRatings[rating]) {
				countedRatings[rating] = 0;
			}
			countedRatings[rating] += 1;

			countedRatings.max = Math.max(countedRatings.max, countedRatings[rating])
		});

		return countedRatings;
	},
	printReport: function () {
		var ratingReportLines = ['', '', '###########', 'RATING REPORT', '##########', ''];

		ratingReportLines.push('Total Ratings: '+ this.ratings().length);
		ratingReportLines.push('Average Rating: '+ Math.round(this.average() * 100)/100);
		ratingReportLines.push('Median Rating: ' + this.median());

		var countedRatings = this.countRatings();

		_.range(0,101,5).forEach(function (rating) {
		    var infoString = (rating / 10) + "";

		    if (rating % 10 === 0) {
		        infoString += '.0'
		    }

		    infoString += " "

		    if (rating !== 100) {
		       infoString = " " +  infoString;
		    }

		    var i;
		    var ratingCount = countedRatings[rating] || 0


		    var spacePadding = '          '.slice(Math.floor(Math.log10(ratingCount)), Math.floor(Math.log10(countedRatings.max)));

		    infoString += spacePadding + ' (' + ratingCount + ') ';


		    for (i = 0; i < ratingCount; i++) {
		        infoString += "#"
		    }
		    ratingReportLines.push(infoString);
		});

		console.log(ratingReportLines.join('\n'));
	},
	loadRatings: function () {
		var self = this;
		self.ratingData = [];

		var url = 'https://www.moviepilot.de/api/movies/MOVIE_ID/comments?page=PAGE&per_page=PER_PAGE';

		var movieUrl = url.replace('MOVIE_ID', this.movieId());

		loadRatingChunk(1, 200);

		function loadRatingChunk(page, perPage) {
		    console.log('load page ' + page);
			var nextUrl = movieUrl.replace('PAGE', page).replace('PER_PAGE', perPage);
			jQuery.getJSON(nextUrl, function (data) {
				self.ratingData = self.ratingData.concat(data.results);
				console.log(self.ratingData.length);
				if (data.hasMorePages) {
				    loadRatingChunk(page + 1, perPage);
				} else {
					if (data.totalCommentsCount !== self.ratingData.length) {
						throw new Error('Expected ' + data.totalCommentsCount + ' ratings, but only received ' + self.ratingData.length);
					}
					console.log('Found ' + self.ratingData.length + ' elements');
					self.printReport();
				}
			});
		}
	}
}

moviePilotRatingAnalyser.loadRatings();