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# frozen_string_literal: true
module Banzai
module Filter
# HTML filter that inserts a placeholder element for each
# reference to a metrics dashboard.
class InlineMetricsFilter < Banzai::Filter::InlineEmbedsFilter
# Placeholder element for the frontend to use as an
# injection point for charts.
def create_element(params)
doc.document.create_element(
'div',
class: 'js-render-metrics',
'data-dashboard-url': metrics_dashboard_url(params)
)
end
# Search params for selecting metrics links. A few
# simple checks is enough to boost performance without
# the cost of doing a full regex match.
def xpath_search
"descendant-or-self::a[contains(@href,'metrics') and \
contains(@href,'environments') and \
starts-with(@href, '#{Gitlab.config.gitlab.url}')]"
end
# Regular expression matching metrics urls
def link_pattern
Gitlab::Metrics::Dashboard::Url.metrics_regex
end
private
# Endpoint FE should hit to collect the appropriate
# chart information
def metrics_dashboard_url(params)
Gitlab::Metrics::Dashboard::Url.build_dashboard_url(
params['namespace'],
params['project'],
params['environment'],
embedded: true,
**query_params(params['url'])
)
end
# Parses query params out from full url string into hash.
#
# Ex) 'https://<root>/<project>/<environment>/metrics?title=Title&group=Group'
# --> { title: 'Title', group: 'Group' }
def query_params(url)
Gitlab::Metrics::Dashboard::Url.parse_query(url)
end
end
end
end
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