refactor stat_graph_contributors to es6 module syntax

app/assets/javascripts/graphs/graphs_bundle.js

-require('./stat_graph_contributors');
+import ContributorsStatGraph from './stat_graph_contributors';
+
+// export to global scope
+window.ContributorsStatGraph = ContributorsStatGraph;

app/assets/javascripts/graphs/stat_graph_contributors.js

-/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-var, one-var, camelcase, one-var-declaration-per-line, quotes, no-param-reassign, quote-props, comma-dangle, prefer-template, max-len, no-return-assign */
+/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-var, one-var, camelcase, one-var-declaration-per-line, quotes, no-param-reassign, quote-props, comma-dangle, prefer-template, max-len, no-return-assign, no-shadow */
 
+import d3 from 'd3';
 import { ContributorsGraph, ContributorsAuthorGraph, ContributorsMasterGraph } from './stat_graph_contributors_graph';
 import ContributorsStatGraphUtil from './stat_graph_contributors_util';
 
-/* global d3 */
+export default (function() {
+  function ContributorsStatGraph() {}
 
-window.d3 = require('d3');
+  ContributorsStatGraph.prototype.init = function(log) {
+    var author_commits, total_commits;
+    this.parsed_log = ContributorsStatGraphUtil.parse_log(log);
+    this.set_current_field("commits");
+    total_commits = ContributorsStatGraphUtil.get_total_data(this.parsed_log, this.field);
+    author_commits = ContributorsStatGraphUtil.get_author_data(this.parsed_log, this.field);
+    this.add_master_graph(total_commits);
+    this.add_authors_graph(author_commits);
+    return this.change_date_header();
+  };
 
-(function() {
-  this.ContributorsStatGraph = (function() {
-    function ContributorsStatGraph() {}
+  ContributorsStatGraph.prototype.add_master_graph = function(total_data) {
+    this.master_graph = new ContributorsMasterGraph(total_data);
+    return this.master_graph.draw();
+  };
 
-    ContributorsStatGraph.prototype.init = function(log) {
-      var author_commits, total_commits;
-      this.parsed_log = ContributorsStatGraphUtil.parse_log(log);
-      this.set_current_field("commits");
-      total_commits = ContributorsStatGraphUtil.get_total_data(this.parsed_log, this.field);
-      author_commits = ContributorsStatGraphUtil.get_author_data(this.parsed_log, this.field);
-      this.add_master_graph(total_commits);
-      this.add_authors_graph(author_commits);
-      return this.change_date_header();
-    };
+  ContributorsStatGraph.prototype.add_authors_graph = function(author_data) {
+    var limited_author_data;
+    this.authors = [];
+    limited_author_data = author_data.slice(0, 100);
+    return _.each(limited_author_data, (function(_this) {
+      return function(d) {
+        var author_graph, author_header;
+        author_header = _this.create_author_header(d);
+        $(".contributors-list").append(author_header);
+        _this.authors[d.author_name] = author_graph = new ContributorsAuthorGraph(d.dates);
+        return author_graph.draw();
+      };
+    })(this));
+  };
 
-    ContributorsStatGraph.prototype.add_master_graph = function(total_data) {
-      this.master_graph = new ContributorsMasterGraph(total_data);
-      return this.master_graph.draw();
-    };
+  ContributorsStatGraph.prototype.format_author_commit_info = function(author) {
+    var commits;
+    commits = $('<span/>', {
+      "class": 'graph-author-commits-count'
+    });
+    commits.text(author.commits + " commits");
+    return $('<span/>').append(commits);
+  };
 
-    ContributorsStatGraph.prototype.add_authors_graph = function(author_data) {
-      var limited_author_data;
-      this.authors = [];
-      limited_author_data = author_data.slice(0, 100);
-      return _.each(limited_author_data, (function(_this) {
-        return function(d) {
-          var author_graph, author_header;
-          author_header = _this.create_author_header(d);
-          $(".contributors-list").append(author_header);
-          _this.authors[d.author_name] = author_graph = new ContributorsAuthorGraph(d.dates);
-          return author_graph.draw();
-        };
-      })(this));
-    };
+  ContributorsStatGraph.prototype.create_author_header = function(author) {
+    var author_commit_info, author_commit_info_span, author_email, author_name, list_item;
+    list_item = $('<li/>', {
+      "class": 'person',
+      style: 'display: block;'
+    });
+    author_name = $('<h4>' + author.author_name + '</h4>');
+    author_email = $('<p class="graph-author-email">' + author.author_email + '</p>');
+    author_commit_info_span = $('<span/>', {
+      "class": 'commits'
+    });
+    author_commit_info = this.format_author_commit_info(author);
+    author_commit_info_span.html(author_commit_info);
+    list_item.append(author_name);
+    list_item.append(author_email);
+    list_item.append(author_commit_info_span);
+    return list_item;
+  };
 
-    ContributorsStatGraph.prototype.format_author_commit_info = function(author) {
-      var commits;
-      commits = $('<span/>', {
-        "class": 'graph-author-commits-count'
-      });
-      commits.text(author.commits + " commits");
-      return $('<span/>').append(commits);
-    };
+  ContributorsStatGraph.prototype.redraw_master = function() {
+    var total_data;
+    total_data = ContributorsStatGraphUtil.get_total_data(this.parsed_log, this.field);
+    this.master_graph.set_data(total_data);
+    return this.master_graph.redraw();
+  };
 
-    ContributorsStatGraph.prototype.create_author_header = function(author) {
-      var author_commit_info, author_commit_info_span, author_email, author_name, list_item;
-      list_item = $('<li/>', {
-        "class": 'person',
-        style: 'display: block;'
-      });
-      author_name = $('<h4>' + author.author_name + '</h4>');
-      author_email = $('<p class="graph-author-email">' + author.author_email + '</p>');
-      author_commit_info_span = $('<span/>', {
-        "class": 'commits'
-      });
-      author_commit_info = this.format_author_commit_info(author);
-      author_commit_info_span.html(author_commit_info);
-      list_item.append(author_name);
-      list_item.append(author_email);
-      list_item.append(author_commit_info_span);
-      return list_item;
-    };
+  ContributorsStatGraph.prototype.redraw_authors = function() {
+    var author_commits, x_domain;
+    $("ol").html("");
+    x_domain = ContributorsGraph.prototype.x_domain;
+    author_commits = ContributorsStatGraphUtil.get_author_data(this.parsed_log, this.field, x_domain);
+    return _.each(author_commits, (function(_this) {
+      return function(d) {
+        _this.redraw_author_commit_info(d);
+        $(_this.authors[d.author_name].list_item).appendTo("ol");
+        _this.authors[d.author_name].set_data(d.dates);
+        return _this.authors[d.author_name].redraw();
+      };
+    })(this));
+  };
 
-    ContributorsStatGraph.prototype.redraw_master = function() {
-      var total_data;
-      total_data = ContributorsStatGraphUtil.get_total_data(this.parsed_log, this.field);
-      this.master_graph.set_data(total_data);
-      return this.master_graph.redraw();
-    };
+  ContributorsStatGraph.prototype.set_current_field = function(field) {
+    return this.field = field;
+  };
 
-    ContributorsStatGraph.prototype.redraw_authors = function() {
-      var author_commits, x_domain;
-      $("ol").html("");
-      x_domain = ContributorsGraph.prototype.x_domain;
-      author_commits = ContributorsStatGraphUtil.get_author_data(this.parsed_log, this.field, x_domain);
-      return _.each(author_commits, (function(_this) {
-        return function(d) {
-          _this.redraw_author_commit_info(d);
-          $(_this.authors[d.author_name].list_item).appendTo("ol");
-          _this.authors[d.author_name].set_data(d.dates);
-          return _this.authors[d.author_name].redraw();
-        };
-      })(this));
-    };
+  ContributorsStatGraph.prototype.change_date_header = function() {
+    var print, print_date_format, x_domain;
+    x_domain = ContributorsGraph.prototype.x_domain;
+    print_date_format = d3.time.format("%B %e %Y");
+    print = print_date_format(x_domain[0]) + " - " + print_date_format(x_domain[1]);
+    return $("#date_header").text(print);
+  };
 
-    ContributorsStatGraph.prototype.set_current_field = function(field) {
-      return this.field = field;
-    };
+  ContributorsStatGraph.prototype.redraw_author_commit_info = function(author) {
+    var author_commit_info, author_list_item;
+    author_list_item = $(this.authors[author.author_name].list_item);
+    author_commit_info = this.format_author_commit_info(author);
+    return author_list_item.find("span").html(author_commit_info);
+  };
 
-    ContributorsStatGraph.prototype.change_date_header = function() {
-      var print, print_date_format, x_domain;
-      x_domain = ContributorsGraph.prototype.x_domain;
-      print_date_format = d3.time.format("%B %e %Y");
-      print = print_date_format(x_domain[0]) + " - " + print_date_format(x_domain[1]);
-      return $("#date_header").text(print);
-    };
-
-    ContributorsStatGraph.prototype.redraw_author_commit_info = function(author) {
-      var author_commit_info, author_list_item;
-      author_list_item = $(this.authors[author.author_name].list_item);
-      author_commit_info = this.format_author_commit_info(author);
-      return author_list_item.find("span").html(author_commit_info);
-    };
-
-    return ContributorsStatGraph;
-  })();
-}).call(window);
+  return ContributorsStatGraph;
+})();