add sharing to telegram

app/controllers/ajax/answer_controller.rb

@@ -5,6 +5,7 @@ require "cgi"
 class Ajax::AnswerController < AjaxController
   include SocialHelper::TwitterMethods
   include SocialHelper::TumblrMethods
+  include SocialHelper::TelegramMethods
 
   def create
     params.require :id
@@ -41,13 +42,7 @@ class Ajax::AnswerController < AjaxController
     @response[:message] = t(".success")
     @response[:success] = true
 
-    if current_user.sharing_enabled
-      @response[:sharing] = {
-        twitter: twitter_share_url(answer),
-        tumblr:  tumblr_share_url(answer),
-        custom:  CGI.escape(prepare_tweet(answer))
-      }
-    end
+    @response[:sharing] = sharing_hash(answer) if current_user.sharing_enabled
 
     return if inbox
 
@@ -74,4 +69,13 @@ class Ajax::AnswerController < AjaxController
     @response[:message] = t(".success")
     @response[:success] = true
   end
+
+  private
+
+  def sharing_hash(answer) = {
+    twitter:  twitter_share_url(answer),
+    tumblr:   tumblr_share_url(answer),
+    telegram: telegram_share_url(answer),
+    custom:   CGI.escape(prepare_tweet(answer)),
+  }
 end

app/helpers/social_helper.rb

@@ -1,4 +1,7 @@
+# frozen_string_literal: true
+
 module SocialHelper
   include SocialHelper::TwitterMethods
   include SocialHelper::TumblrMethods
+  include SocialHelper::TelegramMethods
 end

app/helpers/social_helper/telegram_methods.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require "cgi"
+
+module SocialHelper::TelegramMethods
+  include MarkdownHelper
+
+  def telegram_text(answer)
+    # using twitter_markdown here as it removes all formatting
+    "#{twitter_markdown answer.question.content}\n———\n#{twitter_markdown answer.content}"
+  end
+
+  def telegram_share_url(answer)
+    url = answer_url(
+      id:       answer.id,
+      username: answer.user.screen_name,
+      host:     APP_CONFIG["hostname"],
+      protocol: (APP_CONFIG["https"] ? :https : :http)
+    )
+
+    %(https://t.me/share/url?url=#{CGI.escape(url)}&text=#{CGI.escape(telegram_text(answer))})
+  end
+end

app/javascript/retrospring/controllers/inbox_sharing_controller.ts

@@ -1,10 +1,11 @@
 import { Controller } from '@hotwired/stimulus';
 
 export default class extends Controller {
-  static targets = ['twitter', 'tumblr', 'custom'];
+  static targets = ['twitter', 'tumblr', 'telegram', 'custom'];
 
   declare readonly twitterTarget: HTMLAnchorElement;
   declare readonly tumblrTarget: HTMLAnchorElement;
+  declare readonly telegramTarget: HTMLAnchorElement;
   declare readonly customTarget: HTMLAnchorElement;
   declare readonly hasCustomTarget: boolean;
 
@@ -20,6 +21,7 @@ export default class extends Controller {
     if (this.autoCloseValue) {
       this.twitterTarget.addEventListener('click', () => this.close());
       this.tumblrTarget.addEventListener('click', () => this.close());
+      this.telegramTarget.addEventListener('click', () => this.close());
 
       if (this.hasCustomTarget) {
         this.customTarget.addEventListener('click', () => this.close());
@@ -36,6 +38,7 @@ export default class extends Controller {
 
     this.twitterTarget.href = this.configValue['twitter'];
     this.tumblrTarget.href = this.configValue['tumblr'];
+    this.telegramTarget.href = this.configValue['telegram'];
 
     if (this.hasCustomTarget) {
       this.customTarget.href = `${this.customTarget.href}${this.configValue['custom']}`;

app/views/inbox/_entry.html.haml

@@ -49,6 +49,9 @@
             %a.btn.btn-primary{ href: "#", data: { inbox_sharing_target: "tumblr" }, target: "_blank" }
               %i.fab.fa-tumblr.fa-fw
               Tumblr
+            %a.btn.btn-primary{ href: "#", data: { inbox_sharing_target: "telegram" }, target: "_blank" }
+              %i.fab.fa-telegram.fa-fw
+              Telegram
             - if current_user.sharing_custom_url.present?
               %a.btn.btn-primary{ href: current_user.sharing_custom_url, data: { inbox_sharing_target: "custom" }, target: "_blank" }
                 = current_user.display_sharing_custom_url

spec/controllers/ajax/answer_controller_spec.rb

@@ -13,7 +13,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
         id:,
         answer:,
         share:  shared_services&.to_json,
-        inbox:
+        inbox:,
       }.compact
     end
 
@@ -42,7 +42,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
             "success" => false,
             # caught by rescue_from, so status is not peter_dinklage
             "status"  => "parameter_error",
-            "message" => anything
+            "message" => anything,
           }
         end
 
@@ -70,13 +70,33 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => true,
                 "status"  => "okay",
-                "message" => anything
+                "message" => anything,
               }
             end
 
             include_examples "creates the answer"
 
             it_behaves_like "fails when answer content is empty"
+
+            context "when the user has sharing enabled" do
+              before do
+                user.sharing_enabled = true
+                user.save
+              end
+
+              let(:expected_response) do
+                super().merge(
+                  "sharing" => {
+                    "twitter"  => a_string_matching("https://twitter.com/"),
+                    "tumblr"   => a_string_matching("https://www.tumblr.com/"),
+                    "telegram" => a_string_matching("https://t.me/"),
+                    "custom"   => a_string_matching(/Werfen\+Sie\+nicht\+l%C3%A4nger\+das\+Fenster\+zum\+Geld\+hinaus%21/),
+                  }
+                )
+              end
+
+              include_examples "creates the answer"
+            end
           end
 
           context "when the inbox entry does not belong to the user" do
@@ -85,7 +105,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => false,
                 "status"  => "fail",
-                "message" => anything
+                "message" => anything,
               }
             end
 
@@ -100,7 +120,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => true,
                 "status"  => "okay",
-                "message" => anything
+                "message" => anything,
               }
             end
 
@@ -129,13 +149,33 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
                 "success" => true,
                 "status"  => "okay",
                 "message" => anything,
-                "render"  => anything
+                "render"  => anything,
               }
             end
 
             include_examples "creates the answer"
 
             it_behaves_like "fails when answer content is empty"
+
+            context "when the user has sharing enabled" do
+              before do
+                user.sharing_enabled = true
+                user.save
+              end
+
+              let(:expected_response) do
+                super().merge(
+                  "sharing" => {
+                    "twitter"  => a_string_matching("https://twitter.com/"),
+                    "tumblr"   => a_string_matching("https://www.tumblr.com/"),
+                    "telegram" => a_string_matching("https://t.me/"),
+                    "custom"   => a_string_matching(/Werfen\+Sie\+nicht\+l%C3%A4nger\+das\+Fenster\+zum\+Geld\+hinaus%21/),
+                  }
+                )
+              end
+
+              include_examples "creates the answer"
+            end
           end
 
           context "when question asker does not allow strangers to answer (i.e. question was not in inbox)" do
@@ -144,7 +184,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => false,
                 "status"  => "privacy_stronk",
-                "message" => anything
+                "message" => anything,
               }
             end
 
@@ -160,7 +200,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => false,
                 "status"  => "answering_other_blocked_self",
-                "message" => I18n.t("errors.answering_other_blocked_self")
+                "message" => I18n.t("errors.answering_other_blocked_self"),
               }
             end
 
@@ -176,7 +216,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
               {
                 "success" => false,
                 "status"  => "answering_self_blocked_other",
-                "message" => I18n.t("errors.answering_self_blocked_other")
+                "message" => I18n.t("errors.answering_self_blocked_other"),
               }
             end
 
@@ -196,7 +236,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
             "success" => false,
             # caught by rescue_from, so status is not peter_dinklage
             "status"  => "parameter_error",
-            "message" => anything
+            "message" => anything,
           }
         end
 
@@ -214,7 +254,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
         {
           "success" => false,
           "status"  => "err",
-          "message" => anything
+          "message" => anything,
         }
       end
 
@@ -230,7 +270,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
 
     let(:params) do
       {
-        answer: answer_id
+        answer: answer_id,
       }
     end
 
@@ -242,7 +282,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
           {
             "success" => true,
             "status"  => "okay",
-            "message" => anything
+            "message" => anything,
           }
         end
 
@@ -259,7 +299,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
           {
             "success" => false,
             "status"  => "nopriv",
-            "message" => anything
+            "message" => anything,
           }
         end
 
@@ -311,7 +351,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
           {
             "success" => false,
             "status"  => anything,
-            "message" => anything
+            "message" => anything,
           }
         end
 
@@ -324,7 +364,7 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
         {
           "success" => false,
           "status"  => "nopriv",
-          "message" => anything
+          "message" => anything,
         }
       end
 

spec/helpers/social_helper/telegram_methods_spec.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe SocialHelper::TelegramMethods, type: :helper do
+  let(:user) { FactoryBot.create(:user) }
+  let(:answer) do
+    FactoryBot.create(
+      :answer,
+      user:,
+      content:          "this is an answer\nwith multiple lines\nand **FORMATTING**",
+      question_content: "this is a question .... or is it?"
+    )
+  end
+
+  before do
+    stub_const("APP_CONFIG", {
+                 "hostname"       => "example.com",
+                 "https"          => true,
+                 "items_per_page" => 5,
+               })
+  end
+
+  describe "#telegram_text" do
+    subject { telegram_text(answer) }
+
+    it "returns a proper text for sharing" do
+      expect(subject).to eq(<<~TEXT.strip)
+        this is a question .... or is it?
+        ———
+        this is an answer
+        with multiple lines
+        and FORMATTING
+      TEXT
+    end
+  end
+
+  describe "#telegram_share_url" do
+    subject { telegram_share_url(answer) }
+
+    it "returns a proper share link" do
+      expect(subject).to eq(<<~URL.strip)
+        https://t.me/share/url?url=https%3A%2F%2Fexample.com%2F%40#{answer.user.screen_name}%2Fa%2F#{answer.id}&text=this+is+a+question+....+or+is+it%3F%0A%E2%80%94%E2%80%94%E2%80%94%0Athis+is+an+answer%0Awith+multiple+lines%0Aand+FORMATTING
+      URL
+    end
+  end
+end

spec/views/inbox/_entry.html.haml_spec.rb

@@ -82,6 +82,10 @@ describe "inbox/_entry.html.haml", type: :view do
     expect(rendered).to have_css(%(.inbox-entry__sharing.d-none))
   end
 
+  it "has a link-button to share to telegram" do
+    expect(rendered).to have_css(%(.inbox-entry__sharing a.btn[data-inbox-sharing-target="telegram"]))
+  end
+
   it "has a link-button to share to tumblr" do
     expect(rendered).to have_css(%(.inbox-entry__sharing a.btn[data-inbox-sharing-target="tumblr"]))
   end