Feature: Copy Pad without history (#4295)

New feature to copy a pad without copying entire history.  This is useful to perform a low CPU intensive operation while still copying current pad state.

tests/backend/specs/api/pad.js

@@ -427,6 +427,7 @@ describe('deletePad', function(){
 
 var originalPadId = testPadId;
 var newPadId = makeid();
+var copiedPadId = makeid();
 
 describe('createPad', function(){
   it('creates a new Pad with text', function(done) {
@@ -681,12 +682,126 @@ describe('createPad', function(){
   });
 })
 
+describe('copyPad', function(){
+  it('copies the content of a existent pad', function(done) {
+    api.get(endPoint('copyPad')+"&sourceID="+testPadId+"&destinationID="+copiedPadId+"&force=true")
+      .expect(function(res){
+        if(res.body.code !== 0) throw new Error("Copy Pad Failed")
+      })
+      .expect('Content-Type', /json/)
+      .expect(200, done)
+  });
+})
+
+describe('copyPadWithoutHistory', function(){
+  var sourcePadId = makeid();
+  var newPad;
+
+  before(function(done) {
+    createNewPadWithHtml(sourcePadId, ulHtml, done);
+  });
+
+  beforeEach(function() {
+    newPad = makeid();
+  })
+
+  it('returns a successful response', function(done) {
+    api.get(endPoint('copyPadWithoutHistory')+"&sourceID="+sourcePadId+"&destinationID="+newPad+"&force=false")
+      .expect(function(res){
+        if(res.body.code !== 0) throw new Error("Copy Pad Without History Failed")
+      })
+      .expect('Content-Type', /json/)
+      .expect(200, done)
+  });
+
+  // this test validates if the source pad's text and attributes are kept
+  it('creates a new pad with the same content as the source pad', function(done) {
+    api.get(endPoint('copyPadWithoutHistory')+"&sourceID="+sourcePadId+"&destinationID="+newPad+"&force=false")
+      .expect(function(res){
+        if(res.body.code !== 0) throw new Error("Copy Pad Without History Failed")
+      })
+      .end(function() {
+        api.get(endPoint('getHTML')+"&padID="+newPad)
+          .expect(function(res){
+            var receivedHtml = res.body.data.html.replace("<br><br></body>", "</body>").toLowerCase();
+
+            if (receivedHtml !== expectedHtml) {
+              throw new Error(`HTML received from export is not the one we were expecting.
+                 Received:
+                 ${receivedHtml}
+
+                 Expected:
+                 ${expectedHtml}
+
+                 Which is a slightly modified version of the originally imported one:
+                 ${ulHtml}`);
+            }
+          })
+        .expect(200, done);
+      });
+  });
+
+  context('when try copy a pad with a group that does not exist', function() {
+    var padId = makeid();
+    var padWithNonExistentGroup = `notExistentGroup$${padId}`
+    it('throws an error', function(done) {
+      api.get(endPoint('copyPadWithoutHistory')+"&sourceID="+sourcePadId+"&destinationID="+padWithNonExistentGroup+"&force=true")
+        .expect(function(res){
+          // code 1, it means an error has happened
+          if(res.body.code !== 1) throw new Error("It should report an error")
+        })
+        .expect(200, done);
+    })
+  });
+
+  context('when try copy a pad and destination pad already exist', function() {
+    var padIdExistent = makeid();
+
+    before(function(done) {
+      createNewPadWithHtml(padIdExistent, ulHtml, done);
+    });
+
+    context('and force is false', function() {
+      it('throws an error', function(done) {
+        api.get(endPoint('copyPadWithoutHistory')+"&sourceID="+sourcePadId+"&destinationID="+padIdExistent+"&force=false")
+          .expect(function(res){
+            // code 1, it means an error has happened
+            if(res.body.code !== 1) throw new Error("It should report an error")
+          })
+          .expect(200, done);
+      });
+    });
+
+    context('and force is true', function() {
+      it('returns a successful response', function(done) {
+        api.get(endPoint('copyPadWithoutHistory')+"&sourceID="+sourcePadId+"&destinationID="+padIdExistent+"&force=true")
+          .expect(function(res){
+            // code 1, it means an error has happened
+            if(res.body.code !== 0) throw new Error("Copy pad without history with force true failed")
+          })
+          .expect(200, done);
+      });
+    });
+  })
+})
 
 /*
                           -> movePadForce Test
 
 */
 
+var createNewPadWithHtml = function(padId, html, cb) {
+  api.get(endPoint('createPad')+"&padID="+padId)
+    .end(function() {
+      api.post(endPoint('setHTML'))
+        .send({
+          "padID": padId,
+          "html":  html,
+        })
+        .end(cb);
+    })
+}
+
 var endPoint = function(point, version){
   version = version || apiVersion;
   return '/api/'+version+'/'+point+'?apikey='+apiKey;