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module Gitlab
# Custom parsing for Gitlab-flavored Markdown
#
# Examples
#
# >> m = Markdown.new(...)
#
# >> m.parse("Hey @david, can you fix this?")
# => "Hey <a href="/gitlab/team_members/1">@david</a>, can you fix this?"
#
# >> m.parse("Commit 35d5f7c closes #1234")
# => "Commit <a href="/gitlab/commits/35d5f7c">35d5f7c</a> closes <a href="/gitlab/issues/1234">#1234</a>"
class Markdown
include Rails.application.routes.url_helpers
include ActionView::Helpers
REFERENCE_PATTERN = %r{
([^\w&;])? # Prefix (1)
( # Reference (2)
@([\w\._]+) # User name (3)
|[#!$](\d+) # Issue/MR/Snippet ID (4)
|([\h]{6,40}) # Commit ID (5)
)
([^\w&;])? # Suffix (6)
}x.freeze
attr_reader :html_options
def initialize(project, html_options = {})
@project = project
@html_options = html_options
end
def parse(text)
text.gsub(REFERENCE_PATTERN) do |match|
prefix = $1 || ''
reference = $2
identifier = $3 || $4 || $5
suffix = $6 || ''
if ref_link = reference_link(reference, identifier)
prefix + ref_link + suffix
else
match
end
end
end
private
# Private: Dispatches to a dedicated processing method based on reference
#
# reference - Object reference ("@1234", "!567", etc.)
# identifier - Object identifier (Issue ID, SHA hash, etc.)
#
# Returns string rendered by the processing method
def reference_link(reference, identifier)
case reference
when /^@/ then reference_user(identifier)
when /^#/ then reference_issue(identifier)
when /^!/ then reference_merge_request(identifier)
when /^\$/ then reference_snippet(identifier)
when /^\h/ then reference_commit(identifier)
end
end
def reference_user(identifier)
if user = @project.users.where(name: identifier).first
member = @project.users_projects.where(user_id: user).first
link_to("@#{user.name}", project_team_member_path(@project, member), html_options.merge(class: "gfm gfm-team_member #{html_options[:class]}")) if member
end
end
def reference_issue(identifier)
if issue = @project.issues.where(id: identifier).first
link_to("##{issue.id}", project_issue_path(@project, issue), html_options.merge(title: "Issue: #{issue.title}", class: "gfm gfm-issue #{html_options[:class]}"))
end
end
def reference_merge_request(identifier)
if merge_request = @project.merge_requests.where(id: identifier).first
link_to("!#{merge_request.id}", project_merge_request_path(@project, merge_request), html_options.merge(title: "Merge Request: #{merge_request.title}", class: "gfm gfm-merge_request #{html_options[:class]}"))
end
end
def reference_snippet(identifier)
if snippet = @project.snippets.where(id: identifier).first
link_to("$#{snippet.id}", project_snippet_path(@project, snippet), html_options.merge(title: "Snippet: #{snippet.title}", class: "gfm gfm-snippet #{html_options[:class]}"))
end
end
def reference_commit(identifier)
if commit = @project.commit(identifier)
link_to(identifier, project_commit_path(@project, id: commit.id), html_options.merge(title: "Commit: #{commit.author_name} - #{CommitDecorator.new(commit).title}", class: "gfm gfm-commit #{html_options[:class]}"))
end
end
end
end
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