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61 lines
1.9 KiB
Ruby
61 lines
1.9 KiB
Ruby
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# frozen_string_literal: true
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##
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# Processes slack-formatted text messages, as Mattermost does with
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# Slack incoming webhook interoperability, for example links in the
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# format <LINK> and <LINK|TEXT>, <!here> and <!all> mentions.
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#
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# See https://api.slack.com/reference/surfaces/formatting for all of
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# the different formatting slack supports with mrkdwn which is mostly
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# identical to Markdown.
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#
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# Mattermost docs for translating the slack format:
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#
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# https://docs.mattermost.com/developer/webhooks-incoming.html?highlight=translate%20slack%20data%20format%20mattermost#translate-slack-s-data-format-to-mattermost
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#
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# We may want to process attachments and blocks from slack in future, and
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# convert user IDs into user mentions.
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class Chat::SlackCompatibility
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MRKDWN_LINK_REGEX = Regexp.new(/(<[^\n<\|>]+>|<[^\n<\>]+>)/).freeze
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class << self
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def process_text(text)
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text = text.gsub("<!here>", "@here")
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text = text.gsub("<!all>", "@all")
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text.scan(MRKDWN_LINK_REGEX) do |match|
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match = match.first
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if match.include?("|")
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link, title = match.split("|")[0..1]
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else
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link = match
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end
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title = title&.gsub(/<|>/, "")
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link = link&.gsub(/<|>/, "")
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if title
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text = text.gsub(match, "[#{title}](#{link})")
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else
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text = text.gsub(match, "#{link}")
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end
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end
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text
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end
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# TODO: This is quite hacky and is only here to support a single
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# attachment for our OpsGenie integration. In future we would
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# want to iterate through this attachments array and extract
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# things properly.
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#
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# See https://api.slack.com/reference/messaging/attachments for
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# more details on what fields are here.
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def process_legacy_attachments(attachments)
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text = CGI.unescape(attachments[0][:fallback])
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process_text(text)
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end
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end
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end
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