New [Gerrit] badge (#3667)

services/gerrit/gerrit.service.js

@@ -0,0 +1,96 @@
+'use strict'
+
+const Joi = require('@hapi/joi')
+const { optionalUrl } = require('../validators')
+const { BaseJsonService } = require('..')
+
+const queryParamSchema = Joi.object({
+  baseUrl: optionalUrl.required(),
+}).required()
+
+const schema = Joi.object({
+  status: Joi.equal('NEW', 'MERGED', 'ABANDONED').required(),
+}).required()
+
+module.exports = class Gerrit extends BaseJsonService {
+  static get category() {
+    return 'issue-tracking'
+  }
+
+  static get route() {
+    return {
+      base: 'gerrit',
+      pattern: ':changeId',
+      queryParamSchema,
+    }
+  }
+
+  static get examples() {
+    return [
+      {
+        title: 'Gerrit change status',
+        namedParams: {
+          changeId: '1011478',
+        },
+        queryParams: { baseUrl: 'https://android-review.googlesource.com' },
+        staticPreview: this.render({
+          changeId: 1011478,
+          status: 'MERGED',
+        }),
+      },
+    ]
+  }
+
+  static get defaultBadgeData() {
+    return { label: 'gerrit' }
+  }
+
+  static getColor({ displayStatus }) {
+    if (displayStatus === 'new') {
+      return '2cbe4e'
+    } else if (displayStatus === 'merged') {
+      return 'blueviolet'
+    } else if (displayStatus === 'abandoned') {
+      return 'red'
+    }
+  }
+
+  static render({ changeId, status }) {
+    const displayStatus = status.toLowerCase()
+    const color = this.getColor({ displayStatus })
+    return {
+      label: `change ${changeId}`,
+      message: displayStatus,
+      color,
+    }
+  }
+
+  /**
+   * To prevent against Cross Site Script Inclusion (XSSI) attacks, Gerrit's
+   * JSON response body starts with a magic prefix line that must be stripped
+   * before feeding the rest of the response body to a JSON parser.
+   * See https://gerrit-review.googlesource.com/Documentation/rest-api.html#output
+   */
+  _parseJson(buffer) {
+    const bufferWithoutPrefixLine = buffer.substring(buffer.indexOf('\n') + 1)
+    return super._parseJson(bufferWithoutPrefixLine)
+  }
+
+  async fetch({ changeId, baseUrl }) {
+    return this._requestJson({
+      schema,
+      url: `${baseUrl}/changes/${changeId}`,
+      errorMessages: {
+        404: 'change not found',
+      },
+    })
+  }
+
+  async handle({ changeId }, { baseUrl }) {
+    const data = await this.fetch({ changeId, baseUrl })
+    return this.constructor.render({
+      changeId,
+      status: data.status,
+    })
+  }
+}

services/gerrit/gerrit.tester.js

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+'use strict'
+
+const t = (module.exports = require('../tester').createServiceTester())
+
+// Change open since December 2010, hopefully won't get merged or abandoned anytime soon.
+t.create('Gerrit new change')
+  .get('/2013.json?baseUrl=https://git.eclipse.org/r')
+  .expectBadge({
+    label: 'change 2013',
+    message: 'new',
+    color: '#2cbe4e',
+  })
+
+t.create('Gerrit merged change')
+  .get('/1011478.json?baseUrl=https://android-review.googlesource.com')
+  .expectBadge({
+    label: 'change 1011478',
+    message: 'merged',
+    color: 'blueviolet',
+  })
+
+t.create('Gerrit abandoned change')
+  .get('/69361.json?baseUrl=https://gerrit.libreoffice.org')
+  .expectBadge({
+    label: 'change 69361',
+    message: 'abandoned',
+    color: 'red',
+  })
+
+t.create('Gerrit change not found')
+  .get('/1000000000.json?baseUrl=https://chromium-review.googlesource.com')
+  .expectBadge({
+    label: 'gerrit',
+    message: 'change not found',
+  })
+
+t.create('Gerrit invalid baseUrl')
+  .get('/123.json?baseUrl=something')
+  .expectBadge({
+    label: 'gerrit',
+    message: 'invalid query parameter: baseUrl',
+  })