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module LabelsHelper
include ActionView::Helpers::TagHelper
# Link to a Label
#
# label - Label object to link to
# project - Project object which will be used as the context for the label's
# link. If omitted, defaults to `@project`, or the label's own
# project.
# block - An optional block that will be passed to `link_to`, forming the
# body of the link element. If omitted, defaults to
# `render_colored_label`.
#
# Examples:
#
# # Allow the generated link to use the label's own project
# link_to_label(label)
#
# # Force the generated link to use @project
# @project = Project.first
# link_to_label(label)
#
# # Force the generated link to use a provided project
# link_to_label(label, project: Project.last)
#
# # Customize link body with a block
# link_to_label(label) { "My Custom Label Text" }
#
# Returns a String
def link_to_label(label, project: nil, &block)
project ||= @project || label.project
link = namespace_project_issues_path(project.namespace, project,
label_name: label.name)
if block_given?
link_to link, &block
else
link_to render_colored_label(label), link
end
end
def project_label_names
@project.labels.pluck(:title)
end
def render_colored_label(label)
label_color = label.color || Label::DEFAULT_COLOR
text_color = text_color_for_bg(label_color)
# Intentionally not using content_tag here so that this method can be called
# by LabelReferenceFilter
span = %(<span class="label color-label") +
%( style="background-color: #{label_color}; color: #{text_color}">) +
escape_once(label.name) + '</span>'
span.html_safe
end
def suggested_colors
[
'#0033CC',
'#428BCA',
'#44AD8E',
'#A8D695',
'#5CB85C',
'#69D100',
'#004E00',
'#34495E',
'#7F8C8D',
'#A295D6',
'#5843AD',
'#8E44AD',
'#FFECDB',
'#AD4363',
'#D10069',
'#CC0033',
'#FF0000',
'#D9534F',
'#D1D100',
'#F0AD4E',
'#AD8D43'
]
end
def text_color_for_bg(bg_color)
r, g, b = bg_color.slice(1,7).scan(/.{2}/).map(&:hex)
if (r + g + b) > 500
'#333333'
else
'#FFFFFF'
end
end
def project_labels_options(project)
options_from_collection_for_select(project.labels, 'name', 'name', params[:label_name])
end
# Required for Gitlab::Markdown::LabelReferenceFilter
module_function :render_colored_label, :text_color_for_bg, :escape_once
end
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