Add Twitter service provider

src/serviceproviders.js

@@ -16,9 +16,11 @@ limitations under the License.
 exports.serviceprovidersList = [
   'dns',
   'xmpp',
+  'twitter',
 ]
 
 exports.serviceproviders = {
   dns: require('./serviceproviders/dns'),
-  xmpp: require('./serviceproviders/xmpp')
+  xmpp: require('./serviceproviders/xmpp'),
+  twitter: require('./serviceproviders/twitter'),
 }

src/serviceproviders/twitter.js

@@ -0,0 +1,58 @@
+/*
+Copyright 2020 Yarmo Mackenbach
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+const reURI = /^https:\/\/twitter\.com\/(.*)\/status\/([0-9]*)(?:\?.*)?/
+
+const processURI = (uri, opts) => {
+  if (!opts) { opts = {} }
+  const match = uri.match(reURI)
+
+  return {
+    type: "twitter",
+    profile: {
+      display: `@${match[1]}`,
+      uri: `https://twitter.com/${match[1]}`
+    },
+    proof: {
+      uri: uri,
+      fetch: 'DOIP_PROXY_SERVER_DOMAIN' in opts
+             ? `${opts.DOIP_PROXY_SERVER_DOMAIN}/server/verify/twitter
+?tweetId=${encodeURIComponent(match[2])}
+&account=${encodeURIComponent(match[1])}
+&fingerprint=${fingerprint}`
+             : null
+    },
+    qr: null
+  }
+}
+
+const tests = [
+  {
+    uri: 'https://twitter.com/alice/status/1234567890123456789',
+    shouldMatch: true
+  },
+  {
+    uri: 'https://twitter.com/alice/status/1234567890123456789/',
+    shouldMatch: true
+  },
+  {
+    uri: 'https://domain.org/alice/status/1234567890123456789',
+    shouldMatch: false
+  }
+]
+
+exports.reURI = reURI
+exports.processURI = processURI
+exports.tests = tests

test/verify.test.js

@@ -39,4 +39,10 @@ describe('verify', () => {
     expect(matches).to.be.length(1)
     expect(matches[0].type).to.be.equal('xmpp')
   })
+  it('should match "https://twitter.com/alice/status/1234567890123456789" to the Twitter service provider', () => {
+    const matches = doipjs.verify('https://twitter.com/alice/status/1234567890123456789', null, {returnMatchesOnly: true})
+    expect(matches).to.be.a('array')
+    expect(matches).to.be.length(1)
+    expect(matches[0].type).to.be.equal('twitter')
+  })
 })