Draft parser for gantt diagrams.

src/diagrams/gantt/ganttDb.js

@@ -0,0 +1,174 @@
+/**
+ * Created by knut on 15-01-14.
+ */
+
+var dateFormat = '';
+var title = '';
+var info = false;
+var sections = [];
+var tasks = [];
+var currentSection = '';
+
+exports.clear = function(){
+    sections = [];
+    tasks = [];
+    currentSection = '';
+    title = '';
+    taskCnt = 0;
+    lastTask = undefined;
+};
+
+exports.setDateFormat = function(txt){
+    dateFormat = txt;
+};
+
+exports.getDateFormat = function(){
+    return dateFormat;
+};
+exports.setTitle = function(txt){
+    title = txt;
+};
+
+exports.gettitle = function(){
+    return title;
+};
+
+exports.addSection = function(txt){
+    currentSection = txt;
+    sections.push(txt);
+};
+
+exports.findTaskById = function(id) {
+    var i;
+    for(i=0;i<tasks.length;i++){
+        if(tasks[i].id === id){
+            return tasks[i];
+        }
+    }
+};
+
+exports.getTasks=function(){
+    return tasks;
+};
+
+
+var getStartDate = function(prevTime, dateFormat, str){
+    var moment = require('moment');
+    // Test for after
+    var re = /^after\s+([\d\w\-]+)/;
+    var afterStatement = re.exec(str.trim());
+    if(afterStatement!==null){
+        var task = exports.findTaskById(afterStatement[1]);
+        if(typeof task === 'undefined'){
+            var dt = new Date();
+            dt.setHours(0,0,0,0);
+            return dt;
+        }
+        return task.endTime;
+    }
+    
+    // Check for actual date set
+    if(moment(str,dateFormat,true).isValid()){
+        return moment(str,dateFormat).toDate();
+    }
+    
+    // Default date - now
+    return new Date();
+};
+
+var getEndDate = function(prevTime, dateFormat, str){
+    var moment = require('moment');
+
+    // Check for actual date 
+    if(moment(str,dateFormat,true).isValid()){
+        return moment(str,dateFormat).toDate();
+    }
+    
+    var d = moment(prevTime);
+    // Check for length
+    var re = /^([\d]+)([wdh])/;
+    var durationStatement = re.exec(str.trim());
+
+    if(durationStatement!== null){
+        switch(durationStatement[2]){
+            case 'h':
+                d.add(durationStatement[1], 'hours');
+                break;
+            case 'd':
+                d.add(durationStatement[1], 'days');
+                break;
+            case 'w':
+                d.add(durationStatement[1], 'weeks');
+                break;
+        }
+        return d.toDate();
+    }
+    // Default date - now
+    return d.toDate();
+};
+
+var taskCnt = 0;
+var parseId = function(idStr){
+    if(typeof idStr === 'undefined'){
+        taskCnt = taskCnt + 1;
+        return 'task'+taskCnt;
+    }
+    return idStr;
+};
+// id, startDate, endDate
+// id, startDate, length
+// id, after x, endDate
+// id, after x, length
+// startDate, endDate
+// startDate, length
+// after x, endDate
+// after x, length
+// endDate
+// length
+
+var compileData = function(prevTask, dataStr){
+    var data = dataStr.split(',');
+    var task = {};
+    var df = exports.getDateFormat();
+    
+    switch(data.length){
+        case 1:
+            task.id = parseId();
+            task.startTime = prevTask.endTime;
+            task.endTime   = getEndDate(task.startTime, df, data[0]);
+            break;
+        case 2:
+            task.id = parseId();
+            task.startTime = getStartDate(undefined, df, data[0]);
+            task.endTime   = getEndDate(task.startTime, df, data[1]);
+            break;
+        case 3:
+            task.id = parseId(data[0]);
+            task.startTime = getStartDate(undefined, df, data[1]);
+            task.endTime   = getEndDate(task.startTime, df, data[2]);
+            break;
+        default:
+            
+    }
+    return task;
+};
+
+
+var lastTask;
+exports.addTask = function(descr,data){
+
+    var newTask = {
+        section:currentSection,
+        description:descr
+    };
+    var taskInfo = compileData(lastTask, data);
+    newTask.startTime = taskInfo.startTime;
+    newTask.endTime   = taskInfo.endTime;
+    newTask.id        = taskInfo.id;
+    lastTask = newTask;
+    tasks.push(newTask);
+};
+
+exports.parseError = function(err,hash){
+    mermaid.parseError(err,hash);
+};