Add [Liberapay]

lib/all-badge-examples.js

@@ -1035,6 +1035,22 @@ const allBadgeExamples = [
         title: 'Gratipay',
         previewUri: '/gratipay/project/shields.svg'
       },
+      {
+        title: 'Liberapay receiving',
+        previewUri: '/liberapay/receives/Changaco.svg'
+      },
+      {
+        title: 'Liberapay giving',
+        previewUri: '/liberapay/gives/Changaco.svg'
+      },
+      {
+        title: 'Liberapay patrons',
+        previewUri: '/liberapay/patrons/Changaco.svg'
+      },
+      {
+        title: 'Liberapay goal progress',
+        previewUri: '/liberapay/goal/Changaco.svg'
+      },
       {
         title: 'Bountysource',
         previewUri: '/bountysource/team/mozilla-core/activity.svg'

server.js

@@ -40,7 +40,8 @@ const {
   downloadCount: downloadCountColor,
   floorCount: floorCountColor,
   version: versionColor,
-  age: ageColor
+  age: ageColor,
+  colorScale
 } = require('./lib/color-formatters');
 const {
   makeColorB,
@@ -1072,6 +1073,75 @@ cache(function(data, match, sendBadge, request) {
   });
 }));
 
+// Liberapay integration.
+camp.route(/^\/liberapay\/(receives|gives|patrons|goal)\/(.*)\.(svg|png|gif|jpg|json)$/,
+cache(function(data, match, sendBadge, request) {
+  var type = match[1];  // e.g., 'gives'
+  var entity = match[2]; // e.g., 'Changaco'
+  var format = match[3];
+  var apiUrl = 'https://liberapay.com/' + entity + '/public.json';
+  // Lock down type
+  const label = {
+      'receives': 'receives',
+      'gives': 'gives',
+      'patrons': 'patrons',
+      'goal': 'goal progress',
+      }[type];
+  const badgeData = getBadgeData(label, data);
+  if (badgeData.template === 'social') {
+    badgeData.logo = getLogo('liberapay', data);
+  }
+  request(apiUrl, function dealWithData(err, res, buffer) {
+    if (err != null) {
+      badgeData.text[1] = 'inaccessible';
+      sendBadge(format, badgeData);
+      return;
+    }
+    try {
+      var data = JSON.parse(buffer);
+      var value;
+      var currency;
+      switch(type) {
+        case 'receives':
+            if (data.receiving) {
+                value = data.receiving.amount;
+                currency = data.receiving.currency;
+                badgeData.text[1] = `${metric(value)} ${currency}/week`;
+                }
+            break;
+        case 'gives':
+            if (data.giving) {
+                value = data.giving.amount;
+                currency = data.giving.currency;
+                badgeData.text[1] = `${metric(value)} ${currency}/week`;
+                }
+            break;
+        case 'patrons':
+            value = data.npatrons;
+            badgeData.text[1] = metric(value);
+            break;
+        case 'goal':
+            if (data.goal) {
+                value = Math.round(data.receiving.amount/data.goal.amount*100);
+                badgeData.text[1] = `${value}%`;
+                }
+            break;
+        }
+      if (value != null) {
+        badgeData.colorscheme = colorScale([0, 10, 100])(value);
+        sendBadge(format, badgeData);
+      } else {
+        badgeData.text[1] = 'anonymous';
+        badgeData.colorscheme = 'blue';
+        sendBadge(format, badgeData);
+      }
+    } catch(e) {
+      badgeData.text[1] = 'invalid';
+      sendBadge(format, badgeData);
+    }
+  });
+}));
+
 // Libscore integration.
 camp.route(/^\/libscore\/s\/(.*)\.(svg|png|gif|jpg|json)$/,
 cache(function(data, match, sendBadge, request) {

service-tests/liberapay.js

@@ -0,0 +1,53 @@
+'use strict';
+
+const Joi = require('joi');
+const ServiceTester = require('./runner/service-tester');
+const isLiberapayTestValues =
+  Joi.string().regex(/^([0-9]*[1-9][0-9]*(\.[0-9]+)?|[0]+\.[0-9]*[1-9][0-9]*)[ A-Za-z]{4}\/week/); //values must be greater than zero
+const {isMetric} = require('./helpers/validators');
+const t = new ServiceTester({ id: 'liberapay', title: 'Liberapay' });
+module.exports = t;
+
+t.create('Receiving')
+  .get('/receives/Liberapay.json')
+  .expectJSONTypes(Joi.object().keys({
+    name: 'receives',
+    value: isLiberapayTestValues
+  }));
+
+t.create('Giving')
+  .get('/gives/Changaco.json')
+  .expectJSONTypes(Joi.object().keys({
+    name: 'gives',
+    value: isLiberapayTestValues
+  }));
+
+t.create('Patrons')
+  .get('/patrons/Liberapay.json')
+  .expectJSONTypes(Joi.object().keys({
+    name: 'patrons',
+    value: isMetric
+  }));
+
+t.create('Goal Progress')
+  .get('/goal/Liberapay.json')
+  .expectJSONTypes(Joi.object().keys({
+    name: 'goal progress',
+    value: Joi.string().regex(/^[0-9]+%/)
+  }));
+
+t.create('No Goal')
+  .get('/goal/Liberapay.json')
+  .intercept(nock => nock('https://liberapay.com')
+    .get('/Liberapay/public.json')
+    .reply(200, { goal: null })
+  )
+  .expectJSON({ name: 'goal progress', value: 'anonymous'});
+
+t.create('Empty')
+  .get('/receives/Liberapay.json')
+  .intercept(nock => nock('https://liberapay.com')
+    .get('/Liberapay/public.json')
+    .reply(200, { receiving: 0.00 })
+  )
+  .expectJSON({ name: 'receives', value: 'anonymous'});