Fill in create, edit, update, and destroy for keyword mutes interface.

Also add a destroy-all action, which can be useful if you're flushing an
old list entirely to start a new one.

app/controllers/settings/keyword_mutes_controller.rb

@@ -5,6 +5,7 @@ class Settings::KeywordMutesController < ApplicationController
 
   before_action :authenticate_user!
   before_action :set_account
+  before_action :load_keyword_mute, only: [:edit, :update, :destroy]
 
   def index
     @keyword_mutes = paginated_keyword_mutes_for_account
@@ -14,6 +15,39 @@ class Settings::KeywordMutesController < ApplicationController
     @keyword_mute = keyword_mutes_for_account.build
   end
 
+  def create
+    @keyword_mute = keyword_mutes_for_account.create(keyword_mute_params)
+
+    if @keyword_mute.persisted?
+      redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
+    else
+      render :new
+    end
+  end
+
+  def update
+    if @keyword_mute.update(keyword_mute_params)
+      redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
+    else
+      render :new
+    end
+  end
+
+  def destroy
+    if @keyword_mute.destroy
+      redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
+    else
+      # FIXME
+      redirect_to settings_keyword_mutes_path, notice: "huh that didn't work right"
+    end
+  end
+
+  def destroy_all
+    keyword_mutes_for_account.delete_all
+
+    redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
+  end
+
   private
 
   def set_account
@@ -24,6 +58,14 @@ class Settings::KeywordMutesController < ApplicationController
     KeywordMute.where(account: @account)
   end
 
+  def load_keyword_mute
+    @keyword_mute = keyword_mutes_for_account.find(params[:id])
+  end
+
+  def keyword_mute_params
+    params.require(:keyword_mute).permit(:keyword, :whole_word)
+  end
+
   def paginated_keyword_mutes_for_account
     keyword_mutes_for_account.order(:keyword).page params[:page]
   end