add is_to_all support in sending mass message

lib/weixin_authorize/api/mass.rb

@@ -7,8 +7,8 @@ module WeixinAuthorize
 
       # media_info= {"media_id" media_id}
       # https://api.weixin.qq.com/cgi-bin/message/mass/sendall?access_token=ACCESS_TOKEN
-      def mass_with_group(group_id, media_info, msgtype="mpnews")
-        group_option = {"filter" => {"group_id" => group_id.to_s}}
+      def mass_with_group(group_id, media_info, msgtype="mpnews", is_to_all=false)
+        group_option = {"filter" => {"group_id" => group_id.to_s, "is_to_all" => is_to_all}}
         media = generate_media(msgtype, media_info, group_option)
 
         mass_url = "#{mass_base_url}/sendall"

spec/api/mass_spec.rb

@@ -49,6 +49,11 @@ describe WeixinAuthorize::Api::Mass do
     expect(response.code).to eq(WeixinAuthorize::OK_CODE)
   end
 
+  it "#mass_with_groug send to all" do
+    response = $client.mass_with_group("1", "mass_group_text_to_all", "text", true)
+    expect(response.code).to eq(WeixinAuthorize::OK_CODE)
+  end
+
   it "#mass_with_openids with mpnews and can delete message" do
     response = $client.mass_with_openids([ENV["OPENID"]], mass_media_id)
     expect(response.code).to eq(WeixinAuthorize::OK_CODE)