Send mentions to Slack directly

{
  "pipeline": [
    {
      "type": "source:targetprocess:EntityChanged",
      "entityTypes": [
        "comment"
      ],
      "modifications": {
        "created": true,
        "deleted": false,
        "updated": false
      }
    },
    {
      "or": [
        {
          "and": [
            {
              "value": {
                "type": "constant",
                "value": "@user:"
              },
              "target": {
                "name": "Description",
                "type": "field",
                "target": {
                  "type": "pipelineBlockOutput"
                }
              },
              "operator": {
                "type": "contains"
              }
            }
          ]
        },
        {
          "and": [
            {
              "value": {
                "type": "constant",
                "value": "@user:"
              },
              "target": {
                "name": "Description",
                "type": "field",
                "target": {
                  "type": "pipelineBlockOutput"
                }
              },
              "operator": {
                "type": "contains"
              }
            }
          ]
        }
      ],
      "type": "filter:Relational"
    },
    {
      "type": "action:JavaScript",
      "script": "//WHEN Comment with @mention is created\n//THEN Send Private Slack message to mentioned users\nconst generalID = args.Current.General.Id;\nconst generalName = args.Current.General.Name;\nconst authorName = args.Author.FullName;\nconst tpURL = args.AccountBaseUrl;\n\n// CHANGE TOKEN\nconst bot_token = 'xoxb-0123456789012-xxxxxxxxxxxxx-yyyyyyyyyyyyyyyyyyyyyyyy';\nconst headers = {\n  'Authorization': `Bearer ${bot_token}`\n};\n\nconst MARKDOWN_MARK = \"<!--markdown-->\";\n\nconst isMarkdown = desc => desc.startsWith(MARKDOWN_MARK);\nconst preprocessMarkdown = desc => desc.replace(MARKDOWN_MARK, \"\");\nconst preprocessHtml = desc => decodeHtmlText(removeHtmlTags(desc));\nconst removeHtmlTags = desc => desc.replace(/<\\/?[^>]+(>|$)/g, \"\");\nconst decodeHtmlText = desc => desc.replace(/&#(\\d+);/g, (_, code) => String.fromCharCode(code));\n\nconst rawDescription = args.Current.Description;\nconst description = isMarkdown(rawDescription) ?\n  preprocessMarkdown(rawDescription) :\n  preprocessHtml(rawDescription);\n\nfunction findLogins(desc) {\n  const result = [];\n  const regex = /@user:(.+?)[[]/g;\n\n  let match;\n  while ((match = regex.exec(desc)) !== null) {\n    const login = match[1];\n    if (!result.includes(login)) {\n      result.push(login);\n    }\n  }\n\n  return result;\n}\n\nconst logins = findLogins(description);\n\nconst api = context.getService(\"targetprocess/api/v2\");\n\nconst generalType = await api.getByIdAsync(\"General\", generalID, {\n  select: \"entityType.name\"\n});\n\nconst quote = x => `\"${x}\"`;\nconst users = await api.queryAsync(\"Users\", {\n  select: \"{ login, slackId, name }\",\n  where: `login in [${logins.map(quote)}]`\n});\n\n// What should we do if user with target login wasn't found?\nconst getSlackIdByLogin = login => users.find(x => x.login === login).slackId;\nconst getUserNameByLogin = login => users.find(x => x.login === login).name;\nconst message = description\n  .replace(/@user:(.+?)\\[.*?\\]/g, (_, login) => {\n    const slackId = getSlackIdByLogin(login);\n    return slackId ? `<@${slackId}>` : getUserNameByLogin(login);\n  });\n\n\nconst slackIds = users.filter(function (user) {\n  return user.slackId;\n});\nconsole.log(slackIds);\nreturn slackIds.map(x => ({\n  command: 'SendHttpRequest',\n  payload: {\n    url: 'https://slack.com/api/chat.postMessage',\n    headers: headers,\n    body: {\n      channel: x.slackId,\n      text: `${authorName} mentioned you in ${generalType[0]} *#${generalID}* <${tpURL}/entity/${generalID}|${generalName}>:\\n${message}`\n    }\n  }\n}\n)\n)"
    }
  ]
}