Add Keybase integration (#10297)

* create account_identity_proofs table

* add endpoint for keybase to check local proofs

* add async task to update validity and liveness of proofs from keybase

* first pass keybase proof CRUD

* second pass keybase proof creation

* clean up proof list and add badges

* add avatar url to keybase api

* Always highlight the “Identity Proofs” navigation item when interacting with proofs.

* Update translations.

* Add profile URL.

* Reorder proofs.

* Add proofs to bio.

* Update settings/identity_proofs front-end.

* Use `link_to`.

* Only encode query params if they exist.

URLs without params had a trailing `?`.

* Only show live proofs.

* change valid to active in proof list and update liveness before displaying

* minor fixes

* add keybase config at well-known path

* extremely naive feature flagging off the identity proof UI

* fixes for rubocop

* make identity proofs page resilient to potential keybase issues

* normalize i18n

* tweaks for brakeman

* remove two unused translations

* cleanup and add more localizations

* make keybase_contacts an admin setting

* fix ExternalProofService my_domain

* use Addressable::URI in identity proofs

* use active model serializer for keybase proof config

* more cleanup of keybase proof config

* rename proof is_valid and is_live to proof_valid and proof_live

* cleanup

* assorted tweaks for more robust communication with keybase

* Clean up

* Small fixes

* Display verified identity identically to verified links

* Clean up unused CSS

* Add caching for Keybase avatar URLs

* Remove keybase_contacts setting

3 files changed, 84 insertions, 0 deletions

diff --git a/app/controllers/api/proofs_controller.rb b/app/controllers/api/proofs_controller.rb
new file mode 100644
index 000000000..a84ad2014
--- /dev/null
+++ b/app/controllers/api/proofs_controller.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class Api::ProofsController < Api::BaseController
+  before_action :set_account
+  before_action :set_provider
+  before_action :check_account_approval
+  before_action :check_account_suspension
+
+  def index
+    render json: @account, serializer: @provider.serializer_class
+  end
+
+  private
+
+  def set_provider
+    @provider = ProofProvider.find(params[:provider]) || raise(ActiveRecord::RecordNotFound)
+  end
+
+  def set_account
+    @account = Account.find_local!(params[:username])
+  end
+
+  def check_account_approval
+    not_found if @account.user_pending?
+  end
+
+  def check_account_suspension
+    gone if @account.suspended?
+  end
+end
diff --git a/app/controllers/settings/identity_proofs_controller.rb b/app/controllers/settings/identity_proofs_controller.rb
new file mode 100644
index 000000000..4a3b89a5e
--- /dev/null
+++ b/app/controllers/settings/identity_proofs_controller.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+class Settings::IdentityProofsController < Settings::BaseController
+  layout 'admin'
+
+  before_action :authenticate_user!
+  before_action :check_required_params, only: :new
+
+  def index
+    @proofs = AccountIdentityProof.where(account: current_account).order(provider: :asc, provider_username: :asc)
+    @proofs.each(&:refresh!)
+  end
+
+  def new
+    @proof = current_account.identity_proofs.new(
+      token: params[:token],
+      provider: params[:provider],
+      provider_username: params[:provider_username]
+    )
+
+    render layout: 'auth'
+  end
+
+  def create
+    @proof = current_account.identity_proofs.where(provider: resource_params[:provider], provider_username: resource_params[:provider_username]).first_or_initialize(resource_params)
+    @proof.token = resource_params[:token]
+
+    if @proof.save
+      redirect_to @proof.on_success_path(params[:user_agent])
+    else
+      flash[:alert] = I18n.t('identity_proofs.errors.failed', provider: @proof.provider.capitalize)
+      redirect_to settings_identity_proofs_path
+    end
+  end
+
+  private
+
+  def check_required_params
+    redirect_to settings_identity_proofs_path unless [:provider, :provider_username, :token].all? { |k| params[k].present? }
+  end
+
+  def resource_params
+    params.require(:account_identity_proof).permit(:provider, :provider_username, :token)
+  end
+end
diff --git a/app/controllers/well_known/keybase_proof_config_controller.rb b/app/controllers/well_known/keybase_proof_config_controller.rb
new file mode 100644
index 000000000..eb41e586f
--- /dev/null
+++ b/app/controllers/well_known/keybase_proof_config_controller.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module WellKnown
+  class KeybaseProofConfigController < ActionController::Base
+    def show
+      render json: {}, serializer: ProofProvider::Keybase::ConfigSerializer
+    end
+  end
+end