javascript - Error management in grails -

i quite new grails , in application need check dates. in former java program have used 2 javascript functions different detail granularity. both accept dates 1970-01-01 2099-12-31. 1 demands correct date , (optionally) time , tells user he/she made erroneous entry:

function okdate1(dtstr) {   var ok = true;   // first trim off leading , trailing white space   var trimpattern = /(?:\b(.*)\b)/;   dtstr = (dtstr.match(trimpattern))[1];   // verify input within range , correct   var pat = /^((?:19[7-9][0-9])|(?:20[0-9][0-9]))-((?:(?:0)?[1-9])|(?:1[0-2]))-((?:(?:0)?[1-9])|(?:[1-2][0-9])|(?:3[01]))(?: ((?:(?:0|1)[0-9])|(?:2[0-3])):([0-5][0-9]))?$/;   var dtm = dtstr.match(pat);   if (!dtm) {     ok = false;   } else { // verify day in in range given month     var days = array(31,28,31,30,31,30,31,31,30,31,30,31);     // compensate leap year     if ((((dtm[1] % 4) === 0) && !((dtm[1] % 100) === 0)) || ((dtm[1] % 400) === 0)) {         days[1] = 29;     }     if (dtm[3] > days[dtm[2] - 1]) ok = false;   }   if (!ok) alert("enter date , (optionally) time on form 'yyyy-mm-dd hh:mm'");   return ok; } 

and other checks went wrong accepting wider range on numeric parts of input string:

function okdate2(dtstr) {   // first trim off leading , trailing white space   var trimpattern = /(?:\b(.*)\b)/;   dtstr = (dtstr.match(trimpattern))[1];   // if nothing skip rest   if (!dtstr) return datetimealert(0);   // pattern recognize 'dddd-dd-dd[ dd:dd]' pattern   var pat = /^(?:(\d{4})-(\d{1,2})-(\d{1,2}))(?: (\d{1,2}):(\d{2}))?$/;   var dtm = dtstr.match(pat);   // if not follow pattern: out   if (!dtm) return datetimealert(0);   // convert each group number   // if no time notation corresponding groups become nan   (var = 1; < dtm.length; i++) {     dtm[i] = number(dtm[i]);   }   // check correct year interval   if (dtm[1] < 1970 || dtm[1] > 2099) return datetimealert(1);    // check correct month notation   if (dtm[2] < 1 || dtm[2] > 12) return datetimealert(2);    // array correct numer of days each month   var mdays = array(31,28,31,30,31,30,31,31,30,31,30,31);   // compensate leap year   if ((((dtm[1] % 4) === 0) && !((dtm[1] % 100) === 0)) || ((dtm[1] % 400) === 0)) {     mdays[1] = 29;   }   // check day given month   if (dtm[3] < 1 || mdays[dtm[2] - 1] < dtm[3]) return datetimealert(3);    // if date given , no time, ok   if (isnan(dtm[4]) && isnan(dtm[5])) return true;    // can not happen according pattern, ...   if (isnan(dtm[4]) || isnan(dtm[5])) return datetimealert(4);    // check given hour   if (dtm[4] > 23) return datetimealert(5);    // check given minutes   if (dtm[5] > 59) return datetimealert(6);    // if no error   return true; }  

where function datetimealert puts out alert (hopefully) error message , returns false. 'trimpattern' in both function strip leading , trailing whitespace.

i used them in forms made calls them in "onsubmit" function. objective here not discuss 2 functions comments on them are, of course, welcome.

in grails application use jquery datepicker extended trent richardsons jquery timepicker addon, text string result. call datetimepicker in form:

    <form ...       <dl ...         <dt>start date <span class="required-indicator">*</span></dt>         <dd>           <div class="fieldcontain ${haserrors(bean: todoinstance, field: 'startdate', 'error')} required">             <g:textfield name="startdate" id="datepicker" class="datepicker"                  value="${formatdate(format:'yyyy-mm-dd hh:mm',date:todoinstance?.startad)}" required="" />           </div>         </dd>         ... 

for other 'required' fields little 'tooltip'-like message telling me enter value field.

now, want use 2 datetime javascript in grails application don't want alert boxes popping up, want use them in static-constraints section in domain classes , messages in same manner other fields. how integrate them error management system grails?

this error messages provided validation api. inplement own customized validations can use constraint validator.

i'm assuming declared field java.util.date in domain class, need date object in validator. default, grails handle dates g:datepicker, split date in day, month , year fields.

to bind single string format date object, can register custom date property editor, this example.

the grails validation api server side validation. in case 1 option jquery validation ui plugin, provides client side validation through jquery. plugin supports standard constraints , can create own validations (like date validations), checkout extensibility docs session.