Add web app model, service to fetch metadata

app/models/app_catalog.rb

@@ -0,0 +1,5 @@
+module AppCatalog
+  def self.table_name_prefix
+    "app_catalog_"
+  end
+end

app/models/app_catalog/web_app.rb

@@ -0,0 +1,9 @@
+class AppCatalog::WebApp < ApplicationRecord
+
+  store :metadata, coder: JSON
+
+  validates :url, presence: true, uniqueness: true
+  validates :url, format: { with: URI.regexp },
+                  if: Proc.new { |a| a.url.present? }
+
+end

app/services/app_catalog_manager/fetch_metadata.rb

@@ -0,0 +1,26 @@
+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_service.rb

@@ -0,0 +1,2 @@
+class AppCatalogManagerService < ApplicationService
+end

db/migrate/20231019125135_create_app_catalog_web_apps.rb

@@ -0,0 +1,11 @@
+class CreateAppCatalogWebApps < ActiveRecord::Migration[7.0]
+  def change
+    create_table :app_catalog_web_apps do |t|
+      t.string :url
+      t.string :name
+      t.text   :metadata
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_09_06_073324) do
+ActiveRecord::Schema[7.0].define(version: 2023_10_19_125135) do
   create_table "active_storage_attachments", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -39,6 +39,14 @@ ActiveRecord::Schema[7.0].define(version: 2023_09_06_073324) do
     t.index ["blob_id", "variation_digest"], name: "index_active_storage_variant_records_uniqueness", unique: true
   end
 
+  create_table "app_catalog_web_apps", force: :cascade do |t|
+    t.string "url"
+    t.string "name"
+    t.text "metadata"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
   create_table "donations", force: :cascade do |t|
     t.integer "user_id"
     t.integer "amount_sats"

spec/factories/app_catalog/web_apps.rb

@@ -0,0 +1,14 @@
+FactoryBot.define do
+  factory :app_catalog_web_app, class: 'AppCatalog::WebApp' do
+    url { "https://myfavoritedrinks.remotestorage.io/" }
+    name { "My Favorite Drinks" }
+    short_name { "Drinks" }
+    description { nil }
+    theme_color { nil }
+    background_color { nil }
+    display { nil }
+    start_url { nil }
+    scope { nil }
+    share_target { nil }
+  end
+end

spec/models/app_catalog/web_app_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe AppCatalog::WebApp, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end