Load issues and merge requests templates from repository

3 files changed, 132 insertions, 0 deletions

diff --git a/lib/gitlab/template/finders/base_template_finder.rb b/lib/gitlab/template/finders/base_template_finder.rb
new file mode 100644
index 00000000000..473b05257c6
--- /dev/null
+++ b/lib/gitlab/template/finders/base_template_finder.rb
@@ -0,0 +1,35 @@
+module Gitlab
+  module Template
+    module Finders
+      class BaseTemplateFinder
+        def initialize(base_dir)
+          @base_dir = base_dir
+        end
+
+        def list_files_for
+          raise NotImplementedError
+        end
+
+        def read
+          raise NotImplementedError
+        end
+
+        def find
+          raise NotImplementedError
+        end
+
+        def category_directory(category)
+          return @base_dir unless category.present?
+
+          @base_dir + @categories[category]
+        end
+
+        class << self
+          def filter_regex(extension)
+            /#{Regexp.escape(extension)}\z/
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/template/finders/global_template_finder.rb b/lib/gitlab/template/finders/global_template_finder.rb
new file mode 100644
index 00000000000..831da45191f
--- /dev/null
+++ b/lib/gitlab/template/finders/global_template_finder.rb
@@ -0,0 +1,38 @@
+# Searches and reads file present on Gitlab installation directory
+module Gitlab
+  module Template
+    module Finders
+      class GlobalTemplateFinder < BaseTemplateFinder
+        def initialize(base_dir, extension, categories = {})
+          @categories = categories
+          @extension  = extension
+          super(base_dir)
+        end
+
+        def read(path)
+          File.read(path)
+        end
+
+        def find(key)
+          file_name = "#{key}#{@extension}"
+
+          directory = select_directory(file_name)
+          directory ? File.join(category_directory(directory), file_name) : nil
+        end
+
+        def list_files_for(dir)
+          dir << '/' unless dir.end_with?('/')
+          Dir.glob(File.join(dir, "*#{@extension}")).select { |f| f =~ self.class.filter_regex(@extension) }
+        end
+
+        private
+
+        def select_directory(file_name)
+          @categories.keys.find do |category|
+            File.exist?(File.join(category_directory(category), file_name))
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/template/finders/repo_template_finder.rb b/lib/gitlab/template/finders/repo_template_finder.rb
new file mode 100644
index 00000000000..22c39436cb2
--- /dev/null
+++ b/lib/gitlab/template/finders/repo_template_finder.rb
@@ -0,0 +1,59 @@
+# Searches and reads files present on each Gitlab project repository
+module Gitlab
+  module Template
+    module Finders
+      class RepoTemplateFinder < BaseTemplateFinder
+        # Raised when file is not found
+        class FileNotFoundError < StandardError; end
+
+        def initialize(project, base_dir, extension, categories = {})
+          @categories     = categories
+          @extension      = extension
+          @repository     = project.repository
+          @commit         = @repository.head_commit if @repository.exists?
+
+          super(base_dir)
+        end
+
+        def read(path)
+          blob = @repository.blob_at(@commit.id, path) if @commit
+          raise FileNotFoundError if blob.nil?
+          blob.data
+        end
+
+        def find(key)
+          file_name = "#{key}#{@extension}"
+          directory = select_directory(file_name)
+          raise FileNotFoundError if directory.nil?
+
+          category_directory(directory) + file_name
+        end
+
+        def list_files_for(dir)
+          return [] unless @commit
+
+          dir << '/' unless dir.end_with?('/')
+
+          entries = @repository.tree(:head, dir).entries
+
+          names = entries.map(&:name)
+          names.select { |f| f =~ self.class.filter_regex(@extension) }
+        end
+
+        private
+
+        def select_directory(file_name)
+          return [] unless @commit
+
+          # Insert root as directory
+          directories = ["", @categories.keys]
+
+          directories.find do |category|
+            path = category_directory(category) + file_name
+            @repository.blob_at(@commit.id, path)
+          end
+        end
+      end
+    end
+  end
+end