require 'second_handler'
fb = SecondHandler::FbGroupPost.new('access_token', 'group_id')
# fetch first page (you **must** call this function first if you want to read posts)
page = fb.first_page
# get current content
content = fb.get_content
# get next page
page = fb.next_page

fbp = SecondHandler::FbSinglePost.new('access_token', 'post_id')
fbp.get_post_basic   #get post information

fbp.first_comment    #fetch first comments
fbp.get_comment    #get current page comments
fbp.next_page_comment    #fetch next page comments
fbp.previous_page_comment    #fetch previous page comments

 [{
  "id"=>"0000000_0000000", #feed id
  "message"=>"OOOO", 
  "updated_time"=>"2015-11-08T00:00:00+0000", 
  "attachments"=>[
     {"height"=>720, "src"=>"", "width"=>405},...
  ], #post images
  "from"=>{
    "id"=>"000000000", #user's fbid
    "name"=>"My name", #user's fbname
    "picture"=>{"is_silhouette"=>false, "url"=>"http://www.example.com"} #user's profile picture
  }
 },....]

{
  "id"=>"0000000_0000000", #feed id
  "message"=>"OOOO", 
  "updated_time"=>"2015-11-08T00:00:00+0000", 
  "attachments"=>[
     {"height"=>720, "src"=>"", "width"=>405},...
  ], #post images
  "from"=>{
    "id"=>"000000000", #user's fbid
    "name"=>"My name", #user's fbname
    "picture"=>{"is_silhouette"=>false, "url"=>"http://www.example.com"} #user's profile picture
  }
}

[{
    "id"=>"",
    "message"=>"",
    "created_time"=>"",
    "from"=>{"id"=>"",
    "name"=>"",
    "picture"=>{"is_silhouette"=>false, "url"=>""}},
    "like_count"=>0
},.....]