Download and attach icons for web apps

Gemfile

@@ -47,6 +47,8 @@ gem 'flipper-ui'
 
 # HTTP requests
 gem 'faraday'
+gem 'down'
+gem 'aws-sdk-s3', require: false
 
 # Background/scheduled jobs
 gem 'sidekiq', '< 7'

Gemfile.lock

@@ -92,6 +92,22 @@ GEM
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
+    aws-eventstream (1.2.0)
+    aws-partitions (1.839.0)
+    aws-sdk-core (3.185.1)
+      aws-eventstream (~> 1, >= 1.0.2)
+      aws-partitions (~> 1, >= 1.651.0)
+      aws-sigv4 (~> 1.5)
+      jmespath (~> 1, >= 1.6.1)
+    aws-sdk-kms (1.72.0)
+      aws-sdk-core (~> 3, >= 3.184.0)
+      aws-sigv4 (~> 1.1)
+    aws-sdk-s3 (1.136.0)
+      aws-sdk-core (~> 3, >= 3.181.0)
+      aws-sdk-kms (~> 1)
+      aws-sigv4 (~> 1.6)
+    aws-sigv4 (1.6.0)
+      aws-eventstream (~> 1, >= 1.0.2)
     backport (1.2.0)
     base64 (0.1.1)
     bcrypt (3.1.19)
@@ -147,6 +163,8 @@ GEM
     dotenv-rails (2.8.1)
       dotenv (= 2.8.1)
       railties (>= 3.2)
+    down (5.4.1)
+      addressable (~> 2.8)
     e2mmap (0.1.0)
     ecdsa (1.2.0)
     ecdsa_ext (0.5.0)
@@ -206,6 +224,7 @@ GEM
     jbuilder (2.11.5)
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
+    jmespath (1.6.2)
     json (2.6.3)
     kramdown (2.4.0)
       rexml
@@ -445,6 +464,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  aws-sdk-s3
   byebug (~> 11.1)
   capybara
   cssbundling-rails
@@ -453,6 +473,7 @@ DEPENDENCIES
   devise_ldap_authenticatable
   discourse_api
   dotenv-rails
+  down
   factory_bot_rails
   faker
   faraday

app/models/app_catalog/web_app.rb

@@ -1,9 +1,20 @@
 class AppCatalog::WebApp < ApplicationRecord
-
   store :metadata, coder: JSON
 
+  has_one_attached :icon do |attachable|
+    attachable.variant :medium, resize_to_limit: [128,128]
+    attachable.variant :large,  resize_to_limit: [256,256]
+  end
+
+  has_one_attached :apple_touch_icon
+
   validates :url, presence: true, uniqueness: true
   validates :url, format: { with: URI.regexp },
                   if: Proc.new { |a| a.url.present? }
 
+  # before_create :update_metadata
+
+  def update_metadata
+    AppCatalogManager::UpdateMetadata.call(self)
+  end
 end

app/services/app_catalog_manager/fetch_metadata.rb

@@ -1,26 +0,0 @@
-require 'manifique'
-
-module AppCatalogManager
-  class FetchMetadata < AppCatalogManagerService
-    def initialize(app)
-      @app = app
-    end
-
-    def call
-      agent = Manifique::Agent.new(url: @app.url)
-      metadata = agent.fetch_metadata
-
-      @app.name = metadata.name
-
-      [:name, :short_name, :description, :theme_color, :background_color,
-       :display, :start_url, :scope, :share_target].each do |prop|
-        @app.metadata[prop] = metadata.send(prop) if prop
-      end
-    rescue Manifique::Error => e
-      msg = "Fetching web app manifest failed for #{e.url}: #{e.type}"
-      Rails.logger.warn(msg)
-      Sentry.capture_message(msg) if Setting.sentry_enabled?
-      false
-    end
-  end
-end

app/services/app_catalog_manager/update_metadata.rb

@@ -0,0 +1,44 @@
+require "manifique"
+require "down"
+
+module AppCatalogManager
+  class UpdateMetadata < AppCatalogManagerService
+    def initialize(app)
+      @app = app
+    end
+
+    def call
+      agent = Manifique::Agent.new(url: @app.url)
+      metadata = agent.fetch_metadata
+
+      @app.name = metadata.name
+
+      [:name, :short_name, :description, :theme_color, :background_color,
+       :display, :start_url, :scope, :share_target, :icons].each do |prop|
+        @app.metadata[prop] = metadata.send(prop) if prop
+      end
+
+      if icon = metadata.select_icon(sizes: "256x256")
+        attach_remote_image(:icon, icon)
+      end
+      if apple_touch_icon = metadata.select_icon(purpose: "apple-touch-icon")
+        attach_remote_image(:apple_touch_icon, apple_touch_icon)
+      end
+
+      byebug
+    rescue Manifique::Error => e
+      msg = "Fetching web app manifest failed for #{e.url}: #{e.type}"
+      Rails.logger.warn(msg)
+      Sentry.capture_message(msg) if Setting.sentry_enabled?
+      false
+    end
+
+    def attach_remote_image(attachment_name, icon)
+      download_url = "#{@app.url}/#{icon["src"].gsub(/^\//,'')}"
+      filename = "web_apps/#{@app.id}/icons/#{attachment_name}.png"
+
+      tempfile = Down.download(download_url)
+      @app.send(attachment_name).attach(io: tempfile, filename: filename)
+    end
+  end
+end

config/storage.yml

@@ -9,9 +9,9 @@ test:
 <% if ENV["S3_ENABLED"] %>
 s3:
   service: S3
-  endpoint: ENV["S3_ENDPOINT"]
-  region: ENV["S3_REGION"]
-  bucket: ENV["S3_BUCKET"]
-  access_key_id: ENV["S3_ACCESS_KEY"]
-  secret_access_key: ENV["S3_SECRET_KEY"]
+  endpoint: <%= ENV["S3_ENDPOINT"] %>
+  region: <%= ENV["S3_REGION"] %>
+  bucket: <%= ENV["S3_BUCKET"] %>
+  access_key_id: <%= ENV["S3_ACCESS_KEY"] %>
+  secret_access_key: <%= ENV["S3_SECRET_KEY"] %>
 <% end %>