Adding a graph to show total issues over time

app/controllers/graphs_controller.rb

@@ -3,10 +3,56 @@
 class GraphsController < ApplicationController
 
 	before_filter :find_version, :only => [:target_version_graph]
-	before_filter :find_issues, :only => [:old_issues, :issue_age_graph]
+	before_filter :find_open_issues, :only => [:old_issues, :issue_age_graph]
+	before_filter :find_all_issues, :only => [:issue_growth_graph, :issue_growth]
 
 	helper IssuesHelper
 
+	def issue_growth
+	end
+
+	# Displays projects by total issues over time
+	def issue_growth_graph
+
+		# Initialize the graph
+		graph = SVG::Graph::TimeSeries.new({
+			:height => 300,
+			:min_y_value => 0,
+			:no_css => true,
+			:show_x_guidelines => true,
+			:scale_x_integers => true,
+			:scale_y_integers => true,
+			:show_data_points => false,
+			:show_data_values => false,
+			:stagger_x_labels => true,
+			:style_sheet => "/plugin_assets/redmine_graphs/stylesheets/issue_growth.css",
+			:timescale_divisions => "1 weeks",
+			:width => 800,
+			:x_label_format => "%b %d"
+		})
+
+		# Group issues
+	  	issues_by_project = @issues.group_by {|issue| issue.project }
+		projects_by_size = issues_by_project.collect { |project, issues| [project, issues.size] }.sort { |a,b| b[1]<=>a[1] }[0..5]
+
+		# Generate the created_on line
+		projects_by_size.each do |project, size| 		
+			issues_by_created_on = issues_by_project[project].group_by {|issue| issue.created_on.to_date }.sort
+			created_count = 0
+			created_on_line = Hash.new
+		  	issues_by_created_on.each { |created_on, issues| created_on_line[(created_on-1).to_s] = created_count; created_count += issues.size; created_on_line[created_on.to_s] = created_count }
+		  	created_on_line[Date.today.to_s] = created_count
+		  	graph.add_data({
+				:data => created_on_line.sort.flatten,
+				:title => project.name
+		    })
+		end
+
+	    # Compile the graph
+		headers["Content-Type"] = "image/svg+xml"
+		send_data(graph.burn, :type => "image/svg+xml", :disposition => "inline")
+	end
+
 	def old_issues
 	  	@issues_by_created_on = @issues.sort {|a,b| a.created_on<=>b.created_on} 
 	  	@issues_by_updated_on = @issues.sort {|a,b| a.updated_on<=>b.updated_on} 
@@ -128,14 +174,23 @@ def target_version_graph
 
 	private
 
-	def find_issues
+	def find_open_issues
 	    @project = Project.find(params[:project_id]) unless params[:project_id].blank?
 	    deny_access unless User.current.allowed_to?(:view_issues, @project, :global => true)
 		@issues = Issue.visible.find(:all, :include => [:status], :conditions => ["#{IssueStatus.table_name}.is_closed=?", false]) if @project.nil?
 		@issues = @project.issues.collect { |issue| issue unless issue.closed? }.compact unless @project.nil?
 	rescue ActiveRecord::RecordNotFound
 		render_404
 	end
+
+	def find_all_issues
+	    @project = Project.find(params[:project_id]) unless params[:project_id].blank?
+	    deny_access unless User.current.allowed_to?(:view_issues, @project, :global => true) if @project.nil?
+		@issues = Issue.visible.find(:all, :include => [:project])
+		@issues = @project.issues unless @project.nil?
+	rescue ActiveRecord::RecordNotFound
+		render_404
+	end
 
 	def find_version
 		@version = Version.find(params[:id])

app/views/graphs/issue_growth.html.erb

@@ -0,0 +1,3 @@
+<h2><%= l(:label_graphs_issue_growth) %></h2>
+<%= tag("embed", :width => "100%", :height => 300, :type => "image/svg+xml", :src => url_for(:controller => 'graphs', :action => 'issue_growth_graph')) if @project.nil? %>
+<%= tag("embed", :width => "100%", :height => 300, :type => "image/svg+xml", :src => url_for(:controller => 'graphs', :action => 'issue_growth_graph', :project_id => @project.id)) unless @project.nil? %>

config/locales/en.yml

@@ -1,4 +1,5 @@
 en:
   label_graphs_total_vs_closed_issues: Total issues vs. Closed issues
-  label_graphs_old_issues: Old issues
+  label_graphs_old_issues: Open aging issues
+  label_graphs_issue_growth: Total issues over time
 

init.rb

@@ -1,7 +1,7 @@
 require 'redmine'
 
 require_dependency 'target_version_graph_hook'
-require_dependency 'old_issues_graph_hook'
+require_dependency 'issues_sidebar_graph_hook'
 
 Redmine::Plugin.register :redmine_graphs do
   name 'Redmine Graphs plugin'

lib/issues_sidebar_graph_hook.rb

@@ -0,0 +1,13 @@
+# Provides a link to the issue age graph on the issue index page
+class IssuesSidebarGraphHook < Redmine::Hook::ViewListener
+  def view_issues_sidebar_issues_bottom(context = { })
+  	output = "<h3>Graphs</h3>"
+  	output << link_to(l(:label_graphs_old_issues), {:controller => 'graphs', :action => 'old_issues'}) if context[:project].nil?
+  	output << link_to(l(:label_graphs_old_issues), {:controller => 'graphs', :action => 'old_issues', :project_id => context[:project]}) unless context[:project].nil?
+  	output << "<br/>"
+  	output << link_to(l(:label_graphs_issue_growth), {:controller => 'graphs', :action => 'issue_growth'}) if context[:project].nil?
+  	output << link_to(l(:label_graphs_issue_growth), {:controller => 'graphs', :action => 'issue_growth', :project_id => context[:project]}) unless context[:project].nil?
+  	output << "<br/>"
+  	return output
+  end
+end