3 files changed, 148 insertions, 0 deletions
diff --git a/lib/gitlab/web_ide/config.rb b/lib/gitlab/web_ide/config.rb
new file mode 100644
index 00000000000..3b1fa162b53
--- /dev/null
+++ b/lib/gitlab/web_ide/config.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module WebIde
+    #
+    # Base GitLab WebIde Configuration facade
+    #
+    class Config
+      ConfigError = Class.new(StandardError)
+
+      def initialize(config, opts = {})
+        @config = build_config(config, opts)
+
+        @global = Entry::Global.new(@config,
+          with_image_ports: true)
+        @global.compose!
+      rescue Gitlab::Config::Loader::FormatError => e
+        raise Config::ConfigError, e.message
+      end
+
+      def valid?
+        @global.valid?
+      end
+
+      def errors
+        @global.errors
+      end
+
+      def to_hash
+        @config
+      end
+
+      def terminal_value
+        @global.terminal_value
+      end
+
+      private
+
+      def build_config(config, opts = {})
+        Gitlab::Config::Loader::Yaml.new(config).load!
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/web_ide/config/entry/global.rb b/lib/gitlab/web_ide/config/entry/global.rb
new file mode 100644
index 00000000000..50c3f2d294f
--- /dev/null
+++ b/lib/gitlab/web_ide/config/entry/global.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module WebIde
+    class Config
+      module Entry
+        ##
+        # This class represents a global entry - root Entry for entire
+        # GitLab WebIde Configuration file.
+        #
+        class Global < ::Gitlab::Config::Entry::Node
+          include ::Gitlab::Config::Entry::Configurable
+          include ::Gitlab::Config::Entry::Attributable
+
+          ALLOWED_KEYS = %i[terminal].freeze
+
+          validations do
+            validates :config, allowed_keys: ALLOWED_KEYS
+          end
+
+          entry :terminal, Entry::Terminal,
+            description: 'Configuration of the webide terminal.'
+
+          attributes :terminal
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/web_ide/config/entry/terminal.rb b/lib/gitlab/web_ide/config/entry/terminal.rb
new file mode 100644
index 00000000000..403e308d45b
--- /dev/null
+++ b/lib/gitlab/web_ide/config/entry/terminal.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module WebIde
+    class Config
+      module Entry
+        ##
+        # Entry that represents a concrete CI/CD job.
+        #
+        class Terminal < ::Gitlab::Config::Entry::Node
+          include ::Gitlab::Config::Entry::Configurable
+          include ::Gitlab::Config::Entry::Attributable
+
+          # By default the build will finish in a few seconds, not giving the webide
+          # enough time to connect to the terminal. This default script provides
+          # those seconds blocking the build from finishing inmediately.
+          DEFAULT_SCRIPT = ['sleep 60'].freeze
+
+          ALLOWED_KEYS = %i[image services tags before_script script variables].freeze
+
+          validations do
+            validates :config, allowed_keys: ALLOWED_KEYS
+            validates :config, job_port_unique: { data: ->(record) { record.ports } }
+
+            with_options allow_nil: true do
+              validates :tags, array_of_strings: true
+            end
+          end
+
+          entry :before_script, ::Gitlab::Ci::Config::Entry::Script,
+            description: 'Global before script overridden in this job.'
+
+          entry :script, ::Gitlab::Ci::Config::Entry::Commands,
+            description: 'Commands that will be executed in this job.'
+
+          entry :image, ::Gitlab::Ci::Config::Entry::Image,
+            description: 'Image that will be used to execute this job.'
+
+          entry :services, ::Gitlab::Ci::Config::Entry::Services,
+            description: 'Services that will be used to execute this job.'
+
+          entry :variables, ::Gitlab::Ci::Config::Entry::Variables,
+            description: 'Environment variables available for this job.'
+
+          attributes :tags
+
+          def value
+            to_hash.compact
+          end
+
+          private
+
+          def to_hash
+            { tag_list: tags || [],
+              yaml_variables: yaml_variables,
+              options: {
+                image: image_value,
+                services: services_value,
+                before_script: before_script_value,
+                script: script_value || DEFAULT_SCRIPT
+              }.compact }
+          end
+
+          def yaml_variables
+            return unless variables_value
+
+            variables_value.map do |key, value|
+              { key: key.to_s, value: value, public: true }
+            end
+          end
+        end
+      end
+    end
+  end
+end