Add 2 new APIs: listPadsOfAuthor and listAuthorsOfPad

Return all pads that a given author has contributed to (not just
created) and return all authors who has contributed to a given pad.

src/node/db/API.js

@@ -47,6 +47,7 @@ exports.createGroupPad = groupManager.createGroupPad;
 
 exports.createAuthor = authorManager.createAuthor;
 exports.createAuthorIfNotExistsFor = authorManager.createAuthorIfNotExistsFor;
+exports.listPadsOfAuthor = authorManager.listPadsOfAuthor;
 
 /**********************/
 /**SESSION FUNCTIONS***/
@@ -463,6 +464,26 @@ exports.isPasswordProtected = function(padID, callback)
   });
 }
 
+/**
+listAuthorsOfPad(padID) returns an array of authors who contributed to this pad 
+
+Example returns:
+
+{code: 0, message:"ok", data: {authorIDs : ["a.s8oes9dhwrvt0zif", "a.akf8finncvomlqva"]}
+{code: 1, message:"padID does not exist", data: null}
+*/
+exports.listAuthorsOfPad = function(padID, callback)
+{
+  //get the pad
+  getPadSafe(padID, true, function(err, pad)
+  {
+    if(ERR(err, callback)) return;
+    
+    callback(null, {authorIDs: pad.getAllAuthors()});
+  });
+}
+
+
 /******************************/
 /** INTERNAL HELPER FUNCTIONS */
 /******************************/

src/node/db/AuthorManager.js

@@ -55,6 +55,7 @@ exports.getAuthor4Token = function (token, callback)
 /**
  * Returns the AuthorID for a mapper. 
  * @param {String} token The mapper
+ * @param {String} name The name of the author (optional)
  * @param {Function} callback callback (err, author) 
  */
 exports.createAuthorIfNotExistsFor = function (authorMapper, name, callback)
@@ -153,6 +154,7 @@ exports.getAuthorColorId = function (author, callback)
 /**
  * Sets the color Id of the author
  * @param {String} author The id of the author
+ * @param {String} colorId The color id of the author
  * @param {Function} callback (optional)
  */
 exports.setAuthorColorId = function (author, colorId, callback)
@@ -163,6 +165,7 @@ exports.setAuthorColorId = function (author, colorId, callback)
 /**
  * Returns the name of the author
  * @param {String} author The id of the author
+ * @param {String} name The name of the author
  * @param {Function} callback callback(err, name)
  */
 exports.getAuthorName = function (author, callback)
@@ -179,3 +182,91 @@ exports.setAuthorName = function (author, name, callback)
 {
   db.setSub("globalAuthor:" + author, ["name"], name, callback);
 }
+
+/**
+ * Returns an array of all pads this author contributed to
+ * @param {String} author The id of the author
+ * @param {String} name The name of the author
+ * @param {Function} callback (optional)
+ */
+exports.listPadsOfAuthor = function (authorID, callback)
+{
+  /* There are two other places where this array is manipulated:
+   * (1) When the author is added to a pad, the author object is also updated
+   * (2) When a pad is deleted, each author of that pad is also updated
+   */
+  //get the globalAuthor
+  db.get("globalAuthor:" + authorID, function(err, author)
+  {
+    if(ERR(err, callback)) return;
+
+    //author does not exists
+    if(author == null)
+    {
+      callback(new customError("authorID does not exist","apierror"))
+    }
+    //everything is fine, return the pad IDs
+    else
+    {     
+      var pads = [];
+      if(author.padIDs != null)
+      {
+        for (var padId in author.padIDs)
+        {
+          pads.push(padId);
+        }
+      }
+      callback(null, {padIDs: pads});
+    }
+  });
+}
+
+/**
+ * Adds a new pad to the list of contributions
+ * @param {String} author The id of the author
+ * @param {String} padID The id of the pad the author contributes to
+ * @param {Function} callback (optional)
+ */
+exports.addPad = function (authorID, padID)
+{
+  //get the entry
+  db.get("globalAuthor:" + authorID, function(err, author)
+  {
+    if(ERR(err)) return;
+    if(author == null) return;
+    
+    //the entry doesn't exist so far, let's create it
+    if(author.padIDs == null)
+    {
+      author.padIDs = {padIDs : {}};
+    }
+      
+    //add the entry for this pad
+    author.padIDs[padID] = 1;
+      
+    //save the new element back
+    db.set("globalAuthor:" + authorID, author);
+  });
+}
+
+/**
+ * Removes a pad from the list of contributions
+ * @param {String} author The id of the author
+ * @param {String} padID The id of the pad the author contributes to
+ * @param {Function} callback (optional)
+ */
+exports.removePad = function (authorID, padID)
+{
+  db.get("globalAuthor:" + authorID, function (err, author)
+  {
+    if(ERR(err)) return;
+    if(author == null) return;
+    
+    if(author.padIDs != null)
+    {
+      //remove pad from author
+      delete author.padIDs[padID];   
+      db.set("globalAuthor:" + authorID, author);
+    }
+  });
+}

src/node/db/Pad.js

@@ -82,6 +82,10 @@ Pad.prototype.appendRevision = function appendRevision(aChangeset, author) {
 
   db.set("pad:"+this.id+":revs:"+newRev, newRevData);             
   this.saveToDatabase();
+  
+  // set the author to pad
+  if(author != '')
+    authorManager.addPad(author, this.id);
 };
 
 //save all attributes to the database
@@ -436,6 +440,18 @@ Pad.prototype.remove = function remove(callback) {
             db.remove("pad:"+padID+":revs:"+i);
           }
 
+          callback();
+        },
+        //remove pad from all authors who contributed
+        function(callback)
+        {
+          var authorIDs = _this.getAllAuthors();
+
+          authorIDs.forEach(function (authorID)
+          {
+        	authorManager.removePad(authorID, padID);
+          });
+
           callback();
         }
       ], callback);

src/node/handler/APIHandler.js

@@ -40,13 +40,14 @@ catch(e)
 //a list of all functions
 var functions = {
   "createGroup"               : [],
-  "createGroupIfNotExistsFor"  : ["groupMapper"], 
+  "createGroupIfNotExistsFor" : ["groupMapper"], 
   "deleteGroup"               : ["groupID"], 
   "listPads"                  : ["groupID"], 
   "createPad"                 : ["padID", "text"], 
   "createGroupPad"            : ["groupID", "padName", "text"],
   "createAuthor"              : ["name"], 
   "createAuthorIfNotExistsFor": ["authorMapper" , "name"], 
+  "listPadsOfAuthor"          : ["authorID"], 
   "createSession"             : ["groupID", "authorID", "validUntil"], 
   "deleteSession"             : ["sessionID"], 
   "getSessionInfo"            : ["sessionID"], 
@@ -62,7 +63,8 @@ var functions = {
   "setPublicStatus"           : ["padID", "publicStatus"], 
   "getPublicStatus"           : ["padID"], 
   "setPassword"               : ["padID", "password"], 
-  "isPasswordProtected"       : ["padID"]
+  "isPasswordProtected"       : ["padID"], 
+  "listAuthorsOfPad"          : ["padID"]
 };
 
 /**