add color to roles, improvement in label color detection

app/assets/stylesheets/style.css.scss

@@ -408,7 +408,6 @@ blockquote p {
 
   a.role {
     display: inline-block;
-    color: #fff !important;
     font-weight: bold;
     padding: 4px 0.5em;
     border-radius: 3px;
@@ -419,20 +418,7 @@ blockquote p {
     text-overflow: ellipsis;
     max-width: 27em; // works with the 30 character limit
 
-    &.superadmin, &.admin {
-      background: #d22 !important;
-    }
-
-    &.mod {
-      background: #6af !important;
-    }
-
-    &.normal {
-      background: #282 !important;
-    }
-
     &.banned, &.disabled {
-      background: #ccc !important;
       text-decoration: line-through !important;
       color: #888 !important;
     }

app/helpers/application_helper.rb

@@ -69,6 +69,19 @@ module ApplicationHelper
     render_youtube(md.render(content))
   end
 
+  # calculate the foreground color
+  # either +dark+ or +light+, based on the +bgcolor+
+  def fcolor(bgcolor = "#000", light = "#fff", dark = "#000")
+    bg = bgcolor.gsub(/[^0-9a-f]/i, "")
+    # convert 3 char to 6 char hex
+    bg.gsub!(/./, '\&\&') if bg.length == 3
+    sum = 0
+    [0, 2, 4].each do |i|
+      sum += bg[i..i+1].to_i(16)
+    end
+    return (sum/3 < 128) ? light : dark
+  end
+
   private
 
   def render_youtube(content)

app/models/label.rb

@@ -8,20 +8,6 @@ class Label < ActiveRecord::Base
     name.upcase
   end
 
-  # calculate the foreground color
-  # either black or white, based on the bg color
-  def fcolor
-    bg = color.dup
-    # convert 3 char to 6 char hex
-    bg.gsub!(/./, '\&\&') if bg.length == 3
-    [0, 2, 4].each do |i|
-      if bg[i..i+1] >= "7f"
-        return "000"
-      end
-    end
-    return "fff"
-  end
-
   private
 
   def color_valid

app/models/role.rb

@@ -2,6 +2,8 @@ class Role < ActiveRecord::Base
   include Comparable
   has_many :users
 
+  validates :color, format: {with: /#[0-9a-f]{3,6}/i}
+
 
   def to_s
     self.name

app/views/labels/_label.html.erb

@@ -1,3 +1,3 @@
 <% if label %>
-  <span class="label label-<%= label.name.downcase %>" style="color: #<%= label.fcolor %>;background-color: #<%= label.color %>"><%= label %></span>
+  <span class="label label-<%= label.name.downcase %>" style="color: <%= fcolor(label.color) %>;background-color: #<%= label.color %>"><%= label %></span>
 <% end %>

app/views/users/_username.html.erb

@@ -1,4 +1,4 @@
 <div class="user">
-  <%= link_to user.name, user, class: "role #{user.role.name} #{"banned" if user.banned?} #{"disabled" if user.disabled?} #{"unconfirmed" unless user.confirmed?}", title: user.ign %>
+  <%= link_to user.name, user, class: "role #{user.role.name} #{"banned" if user.banned?} #{"disabled" if user.disabled?} #{"unconfirmed" unless user.confirmed?}", title: user.ign, style: "color: #{fcolor(user.role.color)}; background-color: #{user.role.color}" %>
   <%= link_to "$", donate_statics_path, class: "role donor", title: "Donator" if user.donor? %>
 </div>

db/migrate/20150309221221_add_color_to_roles.rb

@@ -0,0 +1,5 @@
+class AddColorToRoles < ActiveRecord::Migration
+  def change
+    add_column :roles, :color, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150117154652) do
+ActiveRecord::Schema.define(version: 20150309221221) do
 
   create_table "blogposts", force: true do |t|
     t.string   "title"
@@ -83,6 +83,7 @@ ActiveRecord::Schema.define(version: 20150117154652) do
   create_table "roles", force: true do |t|
     t.string  "name"
     t.integer "value"
+    t.string  "color"
   end
 
   create_table "sessions", force: true do |t|

db/seeds.rb

@@ -2,12 +2,12 @@
 # The data can then be loaded with the rake db:seed (or created alongside the db with db:setup).
 
 Role.create!([
-  {name: "disabled", value: 1},
-  {name: "banned", value: 2},
-  {name: "normal", value: 10},
-  {name: "mod", value: 100},
-  {name: "admin", value: 200},
-  {name: "superadmin", value: 500}
+  {name: "disabled", value: 1, color: "#ccc"},
+  {name: "banned", value: 2, color: "#ccc"},
+  {name: "normal", value: 10, color: "#282"},
+  {name: "mod", value: 100, color: "#6af"},
+  {name: "admin", value: 200, color: "#d22"},
+  {name: "superadmin", value: 500, color: "#d22"}
 ])
 
 userpw = SecureRandom.hex(64)