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robotpsyche on 02/28/13

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Last Edited at 02/28/13 07:53am

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Sencha DateTime function

/ Published in: JavaScript

pass in a string representation for a time period and it returns a date object; Weeks are assumed to be Monday midnight Am - Sunday 23:59:59

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switch (dateTimeString)
{
/* DAY ********************************************************/
        
    // get todays date-time, clear its time off
    case 'firstSecondOfToday':
        return Ext.Date.clearTime(new Date());

// take firstSecondOfToday and add 86399 seconds to it- there are 86400 seconds in a day
    case 'lastSecondOfToday':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfToday'), Ext.Date.SECOND, 86399);

/* WEEK ********************************************************/  
        
    // take the numeric representation of the day of the week (0-6) and subtract it from todaysFirstSecond
    // Add one to make the first day of the week the first second of Monday
    case 'firstSecondOfTheWeek':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfToday'), Ext.Date.DAY, -Ext.Date.format(this.getDateTimeFor('firstSecondOfToday'), 'N')+1);
     
    // take first second of the week and subtract 7 days
    case 'firstSecondOfThePreviousWeek':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheWeek'), Ext.Date.DAY, -7); 
    
    // take the first second of the previous week and add number of seconds in a minus one
    case 'lastSecondOfThePreviousWeek':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfThePreviousWeek'), Ext.Date.SECOND, 604799);

/* MONTH ********************************************************/        
        
    case 'firstSecondOfTheMonth':
        return Ext.Date.getFirstDateOfMonth(new Date()); 
    
    // take first second of the month and subtract one month
    case 'firstSecondOfThePreviousMonth':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheMonth'), Ext.Date.MONTH, -1);  
       
    // take the first second of the month and subtract one second
    case 'lastSecondOfThePreviousMonth':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheMonth'), Ext.Date.SECOND, -1);

/* QUARTER ********************************************************/        
        
    // take the current month number, get the remainder after three, add one to compensate for 0 based month numbers,
    // subtract from current month number
    case 'firstSecondOfTheQuarter':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheMonth'), Ext.Date.MONTH, -(Ext.Date.format(this.getDateTimeFor('firstSecondOfTheMonth'), 'n')%3)+1);

// take the first second of the quarter and subtract 3 months
    case 'firstSecondOfThePreviousQuarter':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheQuarter'), Ext.Date.MONTH, -3); 
     
    // take the first second of the current quarter and subtract one second
    case 'lastSecondOfThePreviousQuarter':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheQuarter'), Ext.Date.SECOND, -1);
    
/* YEAR ********************************************************/
        
    // set month and date to january first and append year from firstSecondOfTheMonth
    // undefined time defaults to midnight AM    
    case 'firstSecondOfTheYear':
        return new Date('1/1/'+Ext.Date.format(this.getDateTimeFor('firstSecondOfTheMonth'), 'Y'));
        
    case 'firstSecondOfThePreviousYear':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheYear'), Ext.Date.YEAR, -1); 
      
    // take the first second of the year and subtract one second
    case 'lastSecondOfThePreviousYear':
        return Ext.Date.add(this.getDateTimeFor('firstSecondOfTheYear'), Ext.Date.SECOND, -1);

default:
        console.log('Error: invalid date called from static function getDateTimeFor() - '+dateTimeString);
        return -1;
}

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