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# frozen_string_literal: true
# Manages url matching for metrics dashboards.
module Gitlab
module Metrics
module Dashboard
class Url
class << self
include Gitlab::Utils::StrongMemoize
QUERY_PATTERN = '(?<query>\?[a-zA-Z0-9%.()+_=-]+(&[a-zA-Z0-9%.()+_=-]+)*)?'
ANCHOR_PATTERN = '(?<anchor>\#[a-z0-9_-]+)?'
DASH_PATTERN = '(?:/-)'
# Matches dashboard urls for a Grafana embed.
#
# EX - https://<host>/<namespace>/<project>/grafana/metrics_dashboard
def grafana_regex
strong_memoize(:grafana_regex) do
regex_for_project_metrics(
%r{
#{DASH_PATTERN}?
/grafana
/metrics_dashboard
}xo
)
end
end
# Matches dashboard urls for a metric chart embed
# for cluster metrics.
# This regex needs to match the dashboard URL as well, not just the trigger URL.
# The inline_metrics_redactor_filter.rb uses this regex to match against
# the dashboard URL.
#
# EX - https://<host>/<namespace>/<project>/-/clusters/<cluster_id>/?group=Cluster%20Health&title=Memory%20Usage&y_label=Memory%20(GiB)
# dashboard URL - https://<host>/<namespace>/<project>/-/clusters/<cluster_id>/metrics_dashboard?group=Cluster%20Health&title=Memory%20Usage&y_label=Memory%20(GiB)
def clusters_regex
strong_memoize(:clusters_regex) do
regex_for_project_metrics(
%r{
#{DASH_PATTERN}?
/clusters
/(?<cluster_id>\d+)
/?
( (/metrics) | ( /metrics_dashboard\.json ) )?
}xo
)
end
end
# Matches dashboard urls for a metric chart embed
# for a specifc firing GitLab alert
#
# EX - https://<host>/<namespace>/<project>/prometheus/alerts/<alert_id>/metrics_dashboard
def alert_regex
strong_memoize(:alert_regex) do
regex_for_project_metrics(
%r{
#{DASH_PATTERN}?
/prometheus
/alerts
/(?<alert>\d+)
/metrics_dashboard(\.json)?
}xo
)
end
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 parse_query(url)
query_string = URI.parse(url).query.to_s
CGI.parse(query_string)
.transform_values { |value| value.first }
.symbolize_keys
end
private
def environment_metrics_regex
%r{
#{DASH_PATTERN}?
/environments
/(?<environment>\d+)
/(metrics_dashboard|metrics)
}xo
end
def non_environment_metrics_regex
%r{
#{DASH_PATTERN}
/metrics
(?= # Lookahead to ensure there is an environment query param
\?
.*
environment=(?<environment>\d+)
.*
)
}xo
end
def regex_for_project_metrics(path_suffix_pattern)
%r{
^(?<url>
#{gitlab_host_pattern}
#{project_path_pattern}
#{path_suffix_pattern}
#{QUERY_PATTERN}
#{ANCHOR_PATTERN}
)$
}x
end
def gitlab_host_pattern
Regexp.escape(gitlab_domain)
end
def project_path_pattern
"\/#{Project.reference_pattern}"
end
def gitlab_domain
Gitlab.config.gitlab.url
end
end
end
end
end
end
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