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Edit File: history.js

/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * @fileoverview    function used in this file builds history tab and generates query.
  *
  * @requires    jQuery
  * @requires    moves.js
  * @version $Id$
  */

var history_array = []; // Global array to store history objects
var select_field = [];  // Global array to store informaation for columns which are used in select clause
var g_index;
var vqb_editor = null;

/**
 * To display details of objects(where,rename,Having,aggregate,groupby,orderby,having)
 *
 * @param index index of history_array where change is to be made
 *
**/

/**
 * Sorts history_array[] first,using table name as the key and then generates the HTML code for history tab,
 * clubbing all objects of same tables together
 * This function is called whenever changes are made in history_array[]
 *
 *
 * @param {int}  init starting index of unsorted array
 * @param {int} finit   last index of unsorted array
 *
**/

/**
 * To change And/Or relation in history tab
 *
 *
 * @param {int} index of history_array where change is to be made
 *
**/

/**
 * Deletes entry in history_array
 *
 * @param index index of history_array[] which is to be deleted
 *
**/

/**
 * To show where,rename,aggregate,having forms to edit a object
 *
 * @param{int} index index of history_array where change is to be made
 *
**/

/**
 * Make changes in history_array when Edit button is clicked
 * checks for the type of object and then sets the new value
 *
 * @param index index of history_array where change is to be made
**/

/**
 * history object closure
 *
 * @param ncolumn_name  name of the column on which conditions are put
 * @param nobj          object details(where,rename,orderby,groupby,aggregate)
 * @param ntab          table name of the column on which conditions are applied
 * @param nobj_no       object no used for inner join
 * @param ntype         type of object
 *
**/

/**
 * where object closure, makes an object with all information of where
 *
 * @param nrelation_operator type of relation operator to be applied
 * @param nquery             stores value of value/sub-query
 *
**/

/**
 * Orderby object closure
 *
 * @param norder order, ASC or DESC
 */
var orderby = function (norder) {
    var order;
    this.set_order = function (norder) {
        order = norder;
    };
    this.get_order = function () {
        return order;
    };
    this.set_order(norder);
};

/**
 * Having object closure, makes an object with all information of where
 *
 * @param nrelation_operator type of relation operator to be applied
 * @param nquery             stores value of value/sub-query
 * @param noperator          operator
**/

/**
 * rename object closure,makes an object with all information of rename
 *
 * @param nrename_to new name information
 *
**/

/**
 * aggregate object closure
 *
 * @param noperator aggregte operator
 *
**/

/**
 * This function returns unique element from an array
 *
 * @param arrayName array from which duplicate elem are to be removed.
 * @return unique array
 */

/**
 * This function takes in array and a value as input and returns 1 if values is present in array
 * else returns -1
 *
 * @param arrayName array
 * @param value  value which is to be searched in the array
 */

function found (arrayName, value) {
    for (var i = 0; i < arrayName.length; i++) {
        if (arrayName[i] === value) {
            return 1;
        }
    }
    return -1;
}

/**
 * This function concatenates two array
 *
 * @params add array elements of which are pushed in
 * @params arr array in which elements are added
 */
function add_array (add, arr) {
    for (var i = 0; i < add.length; i++) {
        arr.push(add[i]);
    }
    return arr;
}

/* This function removes all elements present in one array from the other.
 *
 * @params rem array from which each element is removed from other array.
 * @params arr array from which elements are removed.
 *
 */
function remove_array (rem, arr) {
    for (var i = 0; i < rem.length; i++) {
        for (var j = 0; j < arr.length; j++) {
            if (rem[i] === arr[j]) {
                arr.splice(j, 1);
            }
        }
    }
    return arr;
}

/**
 * This function builds the groupby clause from history object
 *
 */

/**
 * This function builds the Having clause from the history object.
 *
 */

/**
 * This function builds the orderby clause from the history object.
 *
 */

/**
 * This function builds the Where clause from the history object.
 *
 */

/**
  * This function builds from clause of query
  * makes automatic joins.
  *
  *
  */
function query_from () {
    var i;
    var tab_left = [];
    var tab_used = [];
    var t_tab_used = [];
    var t_tab_left = [];
    var temp;
    var query = '';
    var quer = '';
    var parts = [];
    var t_array = [];
    t_array = from_array;
    var K = 0;
    var k;
    var key;
    var key2;
    var key3;
    var parts1;

// the constraints that have been used in the LEFT JOIN
    var constraints_added = [];

for (i = 0; i < history_array.length; i++) {
        from_array.push(history_array[i].get_tab());
    }
    from_array = unique(from_array);
    tab_left = from_array;
    temp = tab_left.shift();
    quer = '`' + temp + '`';
    tab_used.push(temp);

// if master table (key2) matches with tab used get all keys and check if tab_left matches
    // after this check if master table (key2) matches with tab left then check if any foreign matches with master .
    for (i = 0; i < 2; i++) {
        for (K in contr) {
            for (key in contr[K]) {// contr name
                for (key2 in contr[K][key]) {// table name
                    parts = key2.split('.');
                    if (found(tab_used, parts[1]) > 0) {
                        for (key3 in contr[K][key][key2]) {
                            parts1 = contr[K][key][key2][key3][0].split('.');
                            if (found(tab_left, parts1[1]) > 0) {
                                if (found(constraints_added, key) > 0) {
                                    query += ' AND ' + '`' + parts[1] + '`.`' + key3 + '` = ';
                                    query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` ';
                                } else {
                                    query += '\n' + 'LEFT JOIN ';
                                    query += '`' + parts[1] + '` ON ';
                                    query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` = ';
                                    query += '`' + parts[1] + '`.`' + key3 + '` ';

constraints_added.push(key);
                                }
                                t_tab_left.push(parts[1]);
                            }
                        }
                    }
                }
            }
        }
        K = 0;
        t_tab_left = unique(t_tab_left);
        tab_used = add_array(t_tab_left, tab_used);
        tab_left = remove_array(t_tab_left, tab_left);
        t_tab_left = [];
        for (K in contr) {
            for (key in contr[K]) {
                for (key2 in contr[K][key]) {// table name
                    parts = key2.split('.');
                    if (found(tab_left, parts[1]) > 0) {
                        for (key3 in contr[K][key][key2]) {
                            parts1 = contr[K][key][key2][key3][0].split('.');
                            if (found(tab_used, parts1[1]) > 0) {
                                if (found(constraints_added, key) > 0) {
                                    query += ' AND ' + '`' + parts[1] + '`.`' + key3 + '` = ';
                                    query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` ';
                                } else {
                                    query += '\n' + 'LEFT JOIN ';
                                    query += '`' + parts[1] + '` ON ';
                                    query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` = ';
                                    query += '`' + parts[1] + '`.`' + key3 + '` ';

constraints_added.push(key);
                                }
                                t_tab_left.push(parts[1]);
                            }
                        }
                    }
                }
            }
        }
        t_tab_left = unique(t_tab_left);
        tab_used = add_array(t_tab_left, tab_used);
        tab_left = remove_array(t_tab_left, tab_left);
        t_tab_left = [];
    }
    for (k in tab_left) {
        quer += ' , `' + tab_left[k] + '`';
    }
    query = quer + query;
    from_array = t_array;
    return query;
}

/**
 * This function is the main function for query building.
 * uses history object details for this.
 *
 * @ uses query_where()
 * @ uses query_groupby()
 * @ uses query_having()
 * @ uses query_orderby()
 *
 * @param formtitle title for the form
 * @param fadin
 */

q_select += '\nFROM ' + query_from();

var q_where = query_where();
    if (q_where !== '') {
        q_select += '\nWHERE ' + q_where;
    }

var q_groupby = query_groupby();
    if (q_groupby !== '') {
        q_select += '\nGROUP BY ' + q_groupby;
    }

var q_having = query_having();
    if (q_having !== '') {
        q_select += '\nHAVING ' + q_having;
    }

var q_orderby = query_orderby();
    if (q_orderby !== '') {
        q_select += '\nORDER BY ' + q_orderby;
    }

/**
     * @var button_options Object containing options
     *                     for jQueryUI dialog buttons
     */
    var button_options = {};
    button_options[PMA_messages.strClose] = function () {
        $(this).dialog('close');
    };
    button_options[PMA_messages.strSubmit] = function () {
        if (vqb_editor) {
            var $elm = $ajaxDialog.find('textarea');
            vqb_editor.save();
            $elm.val(vqb_editor.getValue());
        }
        $('#vqb_form').submit();
    };

AJAX.registerTeardown('designer/history.js', function () {
    vqb_editor = null;
    history_array = [];
    select_field = [];
    $('#ok_edit_rename').off('click');
    $('#ok_edit_having').off('click');
    $('#ok_edit_Aggr').off('click');
    $('#ok_edit_where').off('click');
});

AJAX.registerOnload('designer/history.js', function () {
    $('#ok_edit_rename').click(function () {
        edit('Rename');
    });
    $('#ok_edit_having').click(function () {
        edit('Having');
    });
    $('#ok_edit_Aggr').click(function () {
        edit('Aggregate');
    });
    $('#ok_edit_where').click(function () {
        edit('Where');
    });
    $('#ab').accordion({ collapsible : true, active : 'none' });
});