Added [OPM] version badge (#4615)

Co-Authored-By: Caleb Cartwright <calebcartwright@users.noreply.github.com>

Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>

services/opm/opm-version.service.js

@@ -0,0 +1,69 @@
+'use strict'
+
+const { renderVersionBadge } = require('../version')
+const { BaseService, NotFound, InvalidResponse } = require('..')
+
+module.exports = class OpmVersion extends BaseService {
+  static get category() {
+    return 'version'
+  }
+
+  static get route() {
+    return {
+      base: 'opm/v',
+      pattern: ':user/:moduleName',
+    }
+  }
+
+  static get examples() {
+    return [
+      {
+        title: 'OPM',
+        namedParams: {
+          user: 'openresty',
+          moduleName: 'lua-resty-lrucache',
+        },
+        staticPreview: renderVersionBadge({ version: 'v0.08' }),
+      },
+    ]
+  }
+
+  static get defaultBadgeData() {
+    return {
+      label: 'opm',
+    }
+  }
+
+  async fetch({ user, moduleName }) {
+    const { res } = await this._request({
+      url: `https://opm.openresty.org/api/pkg/fetch`,
+      options: {
+        method: 'HEAD',
+        qs: {
+          account: user,
+          name: moduleName,
+        },
+      },
+      errorMessages: {
+        404: 'module not found',
+      },
+    })
+
+    // XXX: intercept 302 redirects and set followRedirect to false
+    const location = res.request.path
+    if (!location) {
+      throw new NotFound({ prettyMessage: 'module not found' })
+    }
+    const version = location.match(`${moduleName}-(.+).opm`)[1]
+    if (!version) {
+      throw new InvalidResponse({ prettyMessage: 'version invalid' })
+    }
+    return version
+  }
+
+  async handle({ user, moduleName }) {
+    const version = await this.fetch({ user, moduleName })
+
+    return renderVersionBadge({ version })
+  }
+}

services/opm/opm-version.tester.js

@@ -0,0 +1,23 @@
+'use strict'
+
+const Joi = require('@hapi/joi')
+const t = (module.exports = require('../tester').createServiceTester())
+
+const isValidVersion = Joi.string()
+  .regex(/^v[\d+.]+$/)
+  .required()
+
+t.create('version')
+  .get('/openresty/lua-resty-lrucache.json')
+  .expectBadge({
+    label: 'opm',
+    message: isValidVersion,
+  })
+
+t.create('unknown module')
+  .get('/openresty/does-not-exist.json')
+  .expectBadge({ label: 'opm', message: 'module not found' })
+
+t.create('unknown user')
+  .get('/nil/does-not-exist.json')
+  .expectBadge({ label: 'opm', message: 'module not found' })