Add API endpoint to list featured accounts (fixes #8315) (#8317)

2 files changed, 73 insertions, 0 deletions

diff --git a/app/controllers/api/v1/endorsements_controller.rb b/app/controllers/api/v1/endorsements_controller.rb
new file mode 100644
index 000000000..0f04b488f
--- /dev/null
+++ b/app/controllers/api/v1/endorsements_controller.rb
@@ -0,0 +1,72 @@
+# frozen_string_literal: true
+
+class Api::V1::EndorsementsController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read, :'read:accounts' }
+  before_action :require_user!
+  after_action :insert_pagination_headers
+
+  respond_to :json
+
+  def index
+    @accounts = load_accounts
+    render json: @accounts, each_serializer: REST::AccountSerializer
+  end
+
+  private
+
+  def load_accounts
+    if unlimited?
+      endorsed_accounts.all
+    else
+      endorsed_accounts.paginate_by_max_id(
+        limit_param(DEFAULT_ACCOUNTS_LIMIT),
+        params[:max_id],
+        params[:since_id]
+      )
+    end
+  end
+
+  def endorsed_accounts
+    current_account.endorsed_accounts
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    return if unlimited?
+
+    if records_continue?
+      api_v1_endorsements_url pagination_params(max_id: pagination_max_id)
+    end
+  end
+
+  def prev_path
+    return if unlimited?
+
+    unless @accounts.empty?
+      api_v1_endorsements_url pagination_params(since_id: pagination_since_id)
+    end
+  end
+
+  def pagination_max_id
+    @accounts.last.id
+  end
+
+  def pagination_since_id
+    @accounts.first.id
+  end
+
+  def records_continue?
+    @accounts.size == limit_param(DEFAULT_ACCOUNTS_LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.slice(:limit).permit(:limit).merge(core_params)
+  end
+
+  def unlimited?
+    params[:limit] == '0'
+  end
+end
diff --git a/app/models/account_pin.rb b/app/models/account_pin.rb
index 9a21c3405..b51d3d4cd 100644
--- a/app/models/account_pin.rb
+++ b/app/models/account_pin.rb
@@ -11,6 +11,7 @@
 #
 
 class AccountPin < ApplicationRecord
+  include Paginable
   include RelationshipCacheable
 
   belongs_to :account