add [PUB] downloads badge

services/pub/pub-downloads.service.js

@@ -0,0 +1,54 @@
+import Joi from 'joi'
+import { BaseJsonService, pathParams } from '../index.js'
+import { metric } from '../text-formatters.js'
+import { nonNegativeInteger } from '../validators.js'
+import { baseDescription } from './pub-common.js'
+
+const description = `${baseDescription}
+  <p>This badge shows a measure of how many developers have downloaded a package. This provides a raw measure of the overall sentiment of a package from peer developers.</p>`
+
+const schema = Joi.object({
+  downloadCount30Days: nonNegativeInteger,
+}).required()
+
+export default class PubDownloads extends BaseJsonService {
+  static category = 'downloads'
+
+  static route = { base: 'pub/downloads', pattern: ':packageName' }
+
+  static openApi = {
+    '/pub/downloads/{packageName}': {
+      get: {
+        summary: 'Pub Downloads',
+        description,
+        parameters: pathParams({
+          name: 'packageName',
+          example: 'analysis_options',
+        }),
+      },
+    },
+  }
+
+  static defaultBadgeData = { label: 'downloads' }
+
+  static render({ downloadCount30Days }) {
+    return {
+      label: 'downloads',
+      message: metric(downloadCount30Days),
+      color: 'blue',
+    }
+  }
+
+  async fetch({ packageName }) {
+    return this._requestJson({
+      schema,
+      url: `https://pub.dev/api/packages/${packageName}/score`,
+    })
+  }
+
+  async handle({ packageName }) {
+    const score = await this.fetch({ packageName })
+    const downloadCount30Days = score.downloadCount30Days
+    return this.constructor.render({ downloadCount30Days })
+  }
+}

services/pub/pub-downloads.tester.js

@@ -0,0 +1,22 @@
+import { isMetric } from '../test-validators.js'
+import { createServiceTester } from '../tester.js'
+
+export const t = await createServiceTester()
+
+t.create('pub downloads (valid)').get('/analysis_options.json').expectBadge({
+  label: 'downloads',
+  message: isMetric,
+  color: 'blue',
+})
+
+t.create('pub downloads (not found)').get('/analysisoptions.json').expectBadge({
+  label: 'downloads',
+  message: 'not found',
+  color: 'red',
+})
+
+t.create('pub downloads (invalid)').get('/analysis-options.json').expectBadge({
+  label: 'downloads',
+  message: 'invalid',
+  color: 'lightgrey',
+})