/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * @fileoverview    function used in table data manipulation pages
 *
 * @requires    jQuery
 * @requires    jQueryUI
 * @requires    js/functions.js
 *
 */

/**
 * Modify form controls when the "NULL" checkbox is checked
 *
 * @param   theType     string   the MySQL field type
 * @param   urlField    string   the urlencoded field name - OBSOLETE
 * @param   md5Field    string   the md5 hashed field name
 * @param   multi_edit  string   the multi_edit row sequence number
 *
 * @return  boolean  always true
 */
function nullify(theType, urlField, md5Field, multi_edit)
{
    var rowForm = document.forms['insertForm'];

    if (typeof(rowForm.elements['funcs' + multi_edit + '[' + md5Field + ']']) != 'undefined') {
        rowForm.elements['funcs' + multi_edit + '[' + md5Field + ']'].selectedIndex = -1;
    }

    // "ENUM" field with more than 20 characters
    if (theType == 1) {
        rowForm.elements['fields' + multi_edit + '[' + md5Field +  ']'][1].selectedIndex = -1;
    }
    // Other "ENUM" field
    else if (theType == 2) {
        var elts     = rowForm.elements['fields' + multi_edit + '[' + md5Field + ']'];
        // when there is just one option in ENUM:
        if (elts.checked) {
            elts.checked = false;
        } else {
            var elts_cnt = elts.length;
            for (var i = 0; i < elts_cnt; i++ ) {
                elts[i].checked = false;
            } // end for

        } // end if
    }
    // "SET" field
    else if (theType == 3) {
        rowForm.elements['fields' + multi_edit + '[' + md5Field +  '][]'].selectedIndex = -1;
    }
    // Foreign key field (drop-down)
    else if (theType == 4) {
        rowForm.elements['fields' + multi_edit + '[' + md5Field +  ']'].selectedIndex = -1;
    }
    // foreign key field (with browsing icon for foreign values)
    else if (theType == 6) {
        rowForm.elements['fields' + multi_edit + '[' + md5Field + ']'].value = '';
    }
    // Other field types
    else /*if (theType == 5)*/ {
        rowForm.elements['fields' + multi_edit + '[' + md5Field + ']'].value = '';
    } // end if... else if... else

    return true;
} // end of the 'nullify()' function


/**
 * javascript DateTime format validation.
 * its used to prevent adding default (0000-00-00 00:00:00) to database when user enter wrong values
 * Start of validation part
 */
//function checks the number of days in febuary
function daysInFebruary (year){
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
//function to convert single digit to double digit
function fractionReplace(num)
{
    num=parseInt(num);
    var res="00";
    switch(num)
    {
        case 1:res= "01";break;
        case 2:res= "02";break;
        case 3:res= "03";break;
        case 4:res= "04";break;
        case 5:res= "05";break;
        case 6:res= "06";break;
        case 7:res= "07";break;
        case 8:res= "08";break;
        case 9:res= "09";break;
        }
    return res;
}

/* function to check the validity of date
* The following patterns are accepted in this validation (accepted in mysql as well)
* 1) 2001-12-23
* 2) 2001-1-2
* 3) 02-12-23
* 4) And instead of using '-' the following punctuations can be used (+,.,*,^,@,/) All these are accepted by mysql as well. Therefore no issues
*/
function isDate(val,tmstmp)
{
    val=val.replace(/[.|*|^|+|//|@]/g,'-');
    var arrayVal=val.split("-");
    for(var a=0;a<arrayVal.length;a++)
    {
        if(arrayVal[a].length==1)
            arrayVal[a]=fractionReplace(arrayVal[a]);
    }
    val=arrayVal.join("-");
    var pos=2;
            dtexp=new RegExp(/^([0-9]{4})-(((01|03|05|07|08|10|12)-((0[0-9])|([1-2][0-9])|(3[0-1])))|((02|04|06|09|11)-((0[0-9])|([1-2][0-9])|30)))$/);
        if(val.length==8)
        {
            dtexp=new RegExp(/^([0-9]{2})-(((01|03|05|07|08|10|12)-((0[0-9])|([1-2][0-9])|(3[0-1])))|((02|04|06|09|11)-((0[0-9])|([1-2][0-9])|30)))$/);
            pos=0;
        }
        if(dtexp.test(val))
        {
            var month=parseInt(val.substring(pos+3,pos+5));
            var day=parseInt(val.substring(pos+6,pos+8));
            var year=parseInt(val.substring(0,pos+2));
            if(month==2&&day>daysInFebruary(year))
                return false;
            if(val.substring(0,pos+2).length==2)
            {
                if(val.substring(0,pos+2).length==2)
                    year=parseInt("20"+val.substring(0,pos+2));
                else
                    year=parseInt("19"+val.substring(0,pos+2));
            }
            if(tmstmp==true)
            {
                if(year<1978) return false;
                if(year>2038||(year>2037&&day>19&&month>=1)||(year>2037&&month>1)) return false;
                }
        }
        else
            return false;
        return true;
}

/* function to check the validity of time
* The following patterns are accepted in this validation (accepted in mysql as well)
* 1) 2:3:4
* 2) 2:23:43
*/
function isTime(val)
{
    var arrayVal=val.split(":");
    for(var a=0;a<arrayVal.length;a++)
    {
        if(arrayVal[a].length==1)
            arrayVal[a]=fractionReplace(arrayVal[a]);
    }
    val=arrayVal.join(":");
    tmexp=new RegExp(/^(([0-1][0-9])|(2[0-3])):((0[0-9])|([1-5][0-9])):((0[0-9])|([1-5][0-9]))$/);
        if(!tmexp.test(val))
            return false;
        return true;
}

function verificationsAfterFieldChange(urlField, multi_edit, theType){
    var evt = window.event || arguments.callee.caller.arguments[0];
    var target = evt.target || evt.srcElement;

    // Unchecks the corresponding "NULL" control
    $("input[name='fields_null[multi_edit][" + multi_edit + "][" + urlField + "]']").attr({'checked': false});

    // Unchecks the Ignore checkbox for the current row
    $("input[name='insert_ignore_" + multi_edit + "']").attr({'checked': false});
    var $this_input = $("input[name='fields[multi_edit][" + multi_edit + "][" + urlField + "]']");

    // Does this field come from datepicker?
    if ($this_input.data('comes_from') == 'datepicker') {
        // Yes, so do not validate because the final value is not yet in
        // the field and hopefully the datepicker returns a valid date+time
        $this_input.data('comes_from', '');
        return true;
    }

    if(target.name.substring(0,6)=="fields") {
        // validate for date time
        if(theType=="datetime"||theType=="time"||theType=="date"||theType=="timestamp") {
            $this_input.removeClass("invalid_value");
            var dt_value = $this_input.val();
            if(theType=="date"){
                if (! isDate(dt_value)) {
                    $this_input.addClass("invalid_value");
                    return false;
                }
            } else if(theType=="time") {
                if (! isTime(dt_value)) {
                    $this_input.addClass("invalid_value");
                    return false;
                }
            } else if(theType=="datetime"||theType=="timestamp") {
                tmstmp=false;
                if(dt_value == "CURRENT_TIMESTAMP") {
                    return true;
                }
                if(theType=="timestamp") {
                    tmstmp=true;
                }
                if(dt_value=="0000-00-00 00:00:00") {
                    return true;
                }
                var dv=dt_value.indexOf(" ");
                if(dv==-1) {
                    $this_input.addClass("invalid_value");
                    return false;
                } else {
                    if (! (isDate(dt_value.substring(0,dv),tmstmp) && isTime(dt_value.substring(dv+1)))) {
                        $this_input.addClass("invalid_value");
                        return false;
                    }
                }
            }
        }
        //validate for integer type
        if(theType.substring(0,3) == "int"){
            $this_input.removeClass("invalid_value");
            if(isNaN($this_input.val())){
                $this_input.addClass("invalid_value");
                return false;
            }
        }
    }
 }
 /* End of datetime validation*/

/**
 * Ajax handlers for Change Table page
 *
 * Actions Ajaxified here:
 * Submit Data to be inserted into the table
 * Restart insertion with 'N' rows.
 */
$(document).ready(function() {

    // these were hidden via the "hide" class
    $('.foreign_values_anchor').show();

    /**
     * Handles all current checkboxes for Null; this only takes care of the
     * checkboxes on currently displayed rows as the rows generated by 
     * "Continue insertion" are handled in the "Continue insertion" code 
     * 
     */
    $('.checkbox_null').bind('click', function(e) {
            nullify(
                // use hidden fields populated by tbl_change.php
                $(this).siblings('.nullify_code').val(),
                $(this).closest('tr').find('input:hidden').first().val(), 
                $(this).siblings('.hashed_field').val(),
                $(this).siblings('.multi_edit').val()
            );
    });

    /**
     * Submission of data to be inserted or updated 
     * 
     * @uses    PMA_ajaxShowMessage()
     *
     * This section has been deactivated. Here are the problems that I've
     * noticed:
     *
     * 1. If the form contains a file upload field, the data does not reach
     *    tbl_replace.php. This is because AJAX does not support file upload.
     *    As a workaround I tried jquery.form.js version 2.49. The file
     *    upload worked but afterwards the browser presented a tbl_replace.php
     *    file and a choice to open or save.
     *
     * 2. This code can be called if we are editing or inserting. If editing,
     *    the "and then" action can be "go back to this page" or "edit next
     *    row", in which cases it makes sense to use AJAX. But the "go back
     *    to previous page" and "insert another new row" actions, using AJAX 
     *    has no obvious advantage. If inserting, the "go back to previous"
     *    action needs a page refresh anyway. 
     */
    $("#insertFormDEACTIVATED").live('submit', function(event) {

        /**
         * @var the_form    Object referring to the insertion form
         */
        var $form = $(this);
        event.preventDefault();

        PMA_ajaxShowMessage();
        PMA_prepareForAjaxRequest($form);

        $.post($form.attr('action'), $form.serialize(), function(data) {
            if (typeof data.success != 'undefined') {
                if(data.success == true) {
                    PMA_ajaxShowMessage(data.message);

                    $("#topmenucontainer")
                    .next('div')
                    .remove()
                    .end()
                    .after(data.sql_query);

                    //Remove the empty notice div generated due to a NULL query passed to PMA_showMessage()
                    var $notice_class = $("#topmenucontainer").next("div").find('.notice');
                    if ($notice_class.text() == '') {
                        $notice_class.remove();
                    }

                    var submit_type = $form.find("select[name='submit_type']").val();
                    if ('insert' == submit_type || 'insertignore' == submit_type) {
                        //Clear the data in the forms
                        $form.find('input:reset').trigger('click');
                    }
                } else {
                    PMA_ajaxShowMessage(PMA_messages['strErrorProcessingRequest'] + " : "+data.error, "7000");
                }
            } else {
                //happens for example when no change was done while editing
                $('#insertForm').remove();
                $('#topmenucontainer').after('<div id="sqlqueryresults"></div>');
                $('#sqlqueryresults').html(data);
            }
        })
    }) // end submission of data to be inserted into table

    /**
     * Continue Insertion form
     */
    $("#insert_rows").live('change', function(event) {
        event.preventDefault();

        /**
         * @var curr_rows   Number of current insert rows already on page
         */
        var curr_rows = $(".insertRowTable").length;
        /**
         * @var target_rows Number of rows the user wants
         */
        var target_rows = $("#insert_rows").val();

        // remove all datepickers
        $('.datefield,.datetimefield').each(function(){
            $(this).datepicker('destroy');
        });

        if(curr_rows < target_rows ) {
            while( curr_rows < target_rows ) {

                /**
                 * @var $last_row    Object referring to the last row
                 */
                var $last_row = $("#insertForm").find(".insertRowTable:last");

                // need to access this at more than one level
                // (also needs improvement because it should be calculated
                //  just once per cloned row, not once per column)
                var new_row_index = 0;

                //Clone the insert tables
                $last_row
                .clone()
                .insertBefore("#actions_panel")
                .find('input[name*=multi_edit],select[name*=multi_edit],textarea[name*=multi_edit]')
                .each(function() {

                    var $this_element = $(this);
                    /**
                     * Extract the index from the name attribute for all input/select fields and increment it
                     * name is of format funcs[multi_edit][10][<long random string of alphanum chars>]
                     */

                    /**
                     * @var this_name   String containing name of the input/select elements
                     */
                    var this_name = $this_element.attr('name');
                    /** split {@link this_name} at [10], so we have the parts that can be concatenated later */
                    var name_parts = this_name.split(/\[\d+\]/);
                    /** extract the [10] from  {@link name_parts} */
                    var old_row_index_string = this_name.match(/\[\d+\]/)[0];
                    /** extract 10 - had to split into two steps to accomodate double digits */
                    var old_row_index = parseInt(old_row_index_string.match(/\d+/)[0]);

                    /** calculate next index i.e. 11 */
                    new_row_index = old_row_index + 1;
                    /** generate the new name i.e. funcs[multi_edit][11][foobarbaz] */
                    var new_name = name_parts[0] + '[' + new_row_index + ']' + name_parts[1];

                    var hashed_field = name_parts[1].match(/\[(.+)\]/)[1];
                    $this_element.attr('name', new_name);

                    if ($this_element.is('.textfield')) {
                        // do not remove the 'value' attribute for ENUM columns
                        if ($this_element.closest('tr').find('span.column_type').html() != 'enum') {
                            $this_element.attr('value', $this_element.closest('tr').find('span.default_value').html());
                        }
                        $this_element
                        .unbind('change')
                        // Remove onchange attribute that was placed
                        // by tbl_change.php; it refers to the wrong row index
                        .attr('onchange', null)
                        // Keep these values to be used when the element
                        // will change
                        .data('hashed_field', hashed_field)
                        .data('new_row_index', new_row_index)
                        .bind('change', function(e) {
                            var $changed_element = $(this);
                            verificationsAfterFieldChange(
                                $changed_element.data('hashed_field'), 
                                $changed_element.data('new_row_index'), 
                                $changed_element.closest('tr').find('span.column_type').html()
                                );
                        });
                    }

                    if ($this_element.is('.checkbox_null')) {
                        $this_element
                        // this event was bound earlier by jQuery but
                        // to the original row, not the cloned one, so unbind()
                        .unbind('click')
                        // Keep these values to be used when the element
                        // will be clicked 
                        .data('hashed_field', hashed_field)
                        .data('new_row_index', new_row_index)
                        .bind('click', function(e) {
                                var $changed_element = $(this);
                                nullify(
                                    $changed_element.siblings('.nullify_code').val(),
                                    $this_element.closest('tr').find('input:hidden').first().val(), 
                                    $changed_element.data('hashed_field'), 
                                    '[multi_edit][' + $changed_element.data('new_row_index') + ']'
                                    );
                        });
                    }
                }) // end each
                .end()
                .find('.foreign_values_anchor')
                .each(function() {
                        $anchor = $(this);
                        var new_value = 'rownumber=' + new_row_index;
                        // needs improvement in case something else inside
                        // the href contains this pattern
                        var new_href = $anchor.attr('href').replace(/rownumber=\d+/, new_value);
                        $anchor.attr('href', new_href );
                    });

                //Insert/Clone the ignore checkboxes
                if(curr_rows == 1 ) {
                    $('<input id="insert_ignore_1" type="checkbox" name="insert_ignore_1" checked="checked" />')
                    .insertBefore(".insertRowTable:last")
                    .after('<label for="insert_ignore_1">' + PMA_messages['strIgnore'] + '</label>');
                }
                else {

                    /**
                     * @var last_checkbox   Object reference to the last checkbox in #insertForm
                     */
                    var last_checkbox = $("#insertForm").children('input:checkbox:last');

                    /** name of {@link last_checkbox} */
                    var last_checkbox_name = $(last_checkbox).attr('name');
                    /** index of {@link last_checkbox} */
                    var last_checkbox_index = parseInt(last_checkbox_name.match(/\d+/));
                    /** name of new {@link last_checkbox} */
                    var new_name = last_checkbox_name.replace(/\d+/,last_checkbox_index+1);

                    $(last_checkbox)
                    .clone()
                    .attr({'id':new_name, 'name': new_name, 'checked': true})
                    .add('label[for^=insert_ignore]:last')
                    .clone()
                    .attr('for', new_name)
                    .before('<br />')
                    .insertBefore(".insertRowTable:last");
                }
                curr_rows++;
            }
        // recompute tabindex for text fields and other controls at footer;
        // IMO it's not really important to handle the tabindex for
        // function and Null
        var tabindex = 0;
        $('.textfield') 
        .each(function() {
                tabindex++;
                $(this).attr('tabindex', tabindex);
                // update the IDs of textfields to ensure that they are unique
                $(this).attr('id', "field_" + tabindex + "_3");
            });
        $('.control_at_footer')
        .each(function() {
                tabindex++;
                $(this).attr('tabindex', tabindex);
            });
        // Add all the required datepickers back
        $('.datefield,.datetimefield').each(function(){
            PMA_addDatepicker($(this));
            });
        }
        else if( curr_rows > target_rows) {
            while(curr_rows > target_rows) {
                $("input[id^=insert_ignore]:last")
                .nextUntil("fieldset")
                .andSelf()
                .remove();
                curr_rows--;
            }
        }
    })
}, 'top.frame_content'); //end $(document).ready()
