add dub score badge service

services/dub/dub-score.service.js

@@ -0,0 +1,42 @@
+import Joi from 'joi'
+import { BaseJsonService } from '../index.js'
+import { colorScale } from '../color-formatters.js'
+
+const schema = Joi.object({
+  score: Joi.number().required(),
+})
+
+export default class DubScore extends BaseJsonService {
+  static category = 'rating'
+
+  static route = { base: 'dub/score', pattern: ':packageName' }
+
+  static examples = [
+    {
+      title: 'DUB SCORE',
+      namedParams: { packageName: 'vibe-d' },
+      staticPreview: this.render({ score: 4.5 }),
+    },
+  ]
+
+  static defaultBadgeData = { label: 'SCORE' }
+
+  static render({ score }) {
+    return {
+      label: 'SCORE',
+      color: colorScale([1, 2, 3, 4, 5])(score),
+      message: score,
+    }
+  }
+
+  async fetch({ packageName }) {
+    const url = `https://code.dlang.org/api/packages/${packageName}/stats`
+    return this._requestJson({ schema, url })
+  }
+
+  async handle({ packageName }) {
+    let { score } = await this.fetch({ packageName })
+    score = score.toFixed(1)
+    return this.constructor.render({ score })
+  }
+}

services/dub/dub-score.tester.js

@@ -0,0 +1,26 @@
+import Joi from 'joi'
+import { isWithinRange } from '../test-validators.js'
+import { createServiceTester } from '../tester.js'
+
+export const t = await createServiceTester()
+
+const isScoreColor = Joi.equal(
+  'red',
+  'orange',
+  'yellow',
+  'yellowgreen',
+  'green',
+  'brightgreen',
+)
+
+t.create('version (valid)')
+  .get('/vibe-d.json')
+  .expectBadge({
+    label: 'SCORE',
+    message: isWithinRange(0, 5),
+    color: isScoreColor,
+  })
+
+t.create('version (not found)')
+  .get('/not-a-package.json')
+  .expectBadge({ label: 'SCORE', message: 'not found' })

services/test-validators.js

@@ -178,6 +178,16 @@ const isCurrency = withRegex(
   /(?=.*\d)^\$?(([1-9]\d{0,2}(,\d{3})*)|0)?(\.\d{1,2})?$/,
 )
 
+/**
+ * Returns a Joi schema that validates strings that represent numbers within the range [start, end].
+ *
+ * @param {number} start - The lower bound of the range (inclusive)
+ * @param {number} end - The upper bound of the range (inclusive)
+ * @returns {Joi.StringSchema} A Joi schema that uses a regular expression to check if the string is a number in the range
+ */
+const isWithinRange = (start, end) =>
+  withRegex(new RegExp(`^([${start}-${end - 1}](.[0-9])?)|(${end}(.0)?)$`))
+
 export {
   isSemver,
   isVPlusTripleDottedVersion,
@@ -214,4 +224,5 @@ export {
   isOrdinalNumberDaily,
   isHumanized,
   isCurrency,
+  isWithinRange,
 }