use user_name not but user_id

README.md

@@ -27,33 +27,13 @@ Or install it yourself as:
 
 ## Usage
 
-1. Prepare your user_name and password for Instagram.
-2. Prepare instagram user id to check list.
-
-### How to find instagram user id
-
-There are some methods finding instagram user id
-
-- Use this site https://smashballoon.com/instagram-feed/find-instagram-user-id/ 
-- execute Javascript on Profile page to check on Chrome dev console
-
-```apple js
-window._sharedData.entry_data.ProfilePage[0].user.id
-```
-
-![2018-01-30 23 12 23](https://user-images.githubusercontent.com/1485195/35570636-1f79042e-0613-11e8-92f5-a19412bf38c4.png)
-
-#### code
-
 ```ruby
 cli = InstagramUser.new(user_name: 'yuzuru_dev', password: 'PASSWORD')
 
-# input instagram's user id
-follows = cli.get_follows(7007201232)
+follows = cli.get_follows('yuzuru_dev')
 # => ["yudsuzuk", "instagram"]
 
-# input instagram's user id
-followers = cli.get_followers(7007201232)
+followers = cli.get_followers('yuzuru_dev')
 # => ["yudsuzuk"]
 ```
 

lib/instagram_user/client.rb

@@ -7,6 +7,7 @@ class Client
 
     BASE_URL              = 'https://www.instagram.com/graphql/query/?query_hash=%s&variables=%s'.freeze
     LOGIN_URL             = 'https://www.instagram.com/accounts/login/ajax/'.freeze
+    USER_INFO_URL         = 'https://www.instagram.com/%s/?__a=1'.freeze
     DEFAULT_USER_AGENT    = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36'.freeze
     DEFAULT_MAX_NUM_USERS = 3000
     DEFAULT_REFERER       = 'https://www.instagram.com/'.freeze
@@ -29,19 +30,30 @@ def initialize(options = {})
       @referer       = (ENV['INSTAGRAM_REFERER']    || options[:referer]    || DEFAULT_REFERER)
       @num_users     = (ENV['INSTAGRAM_NUM_USERS']  || options[:num_users]  || DEFAULT_MAX_NUM_USERS)
       @session       = Mechanize.new
+      @user_ids      = {}
       logined_session
     end
 
-    def get_follows(user_id)
+    def get_follows(user_name)
+      user_id = @user_ids[user_name].nil? ? get_user_id(user_name) : @user_ids[user_name]
       fetch_all_user_names(user_id, USER_MAP[:follow])
     end
 
-    def get_followers(user_id)
+    def get_followers(user_name)
+      user_id = @user_ids[user_name].nil? ? get_user_id(user_name) : @user_ids[user_name]
       fetch_all_user_names(user_id, USER_MAP[:follower])
     end
 
     private
 
+    def get_user_id(user_name)
+      url = USER_INFO_URL % [user_name]
+      page = @session.get(url)
+      json = JSON.parse(page.body)
+      @user_ids[user_name] = json["user"]["id"]
+      @user_ids[user_name]
+    end
+
     def logined_session
       @session.request_headers = login_http_headers
       @session.post(LOGIN_URL, user_info)
@@ -89,7 +101,7 @@ def fetch_user_names(user_id, request_params, after = nil)
         first: @num_users
       }
       variables[:after] = after unless after.nil?
-      url = format(BASE_URL, request_params[:query_hash], JSON.generate(variables))
+      url = BASE_URL % [request_params[:query_hash], JSON.generate(variables)]
       @session.request_headers = username_http_headers
       page = @session.get(url)
       json = JSON.parse(page.body)

spec/instagram_user_spec.rb

@@ -5,7 +5,6 @@
   before do
     @user_name = 'yuzuru_dev'
     @password = 'gkK9.izwZGBysV82uowpE+JqYzztgVA9'
-    @user_id = '7007201232'
     @cli = InstagramUser.new(
       user_name: @user_name,
       password: @password
@@ -17,17 +16,17 @@
   end
 
   it "get follows" do
-    follows = @cli.get_follows(@user_id)
+    follows = @cli.get_follows(@user_name)
     expect(follows.include?('instagram')).to eq true
   end
 
   it "get followers 1" do
-    follows = @cli.get_followers(@user_id)
+    follows = @cli.get_followers(@user_name)
     expect(follows.include?('instagram')).to eq false
   end
 
   it "get followers 2" do
-    follows = @cli.get_followers(@user_id)
+    follows = @cli.get_followers(@user_name)
     expect(follows.include?('yudsuzuk')).to eq true
   end
 end