1 files changed, 101 insertions, 0 deletions
diff --git a/public/app/views/js/select2-supplementary.php b/public/app/views/js/select2-supplementary.php
new file mode 100644
index 0000000..a7aa7e2
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+++ b/public/app/views/js/select2-supplementary.php
@@ -0,0 +1,101 @@
+<script>
+
+    // supplementary functions to select2 control
+    ////////////////////////////////////////////////////////////////////////////
+
+    /** getValues
+     * --- -- -- - - -
+     * Get selected value(s) of Select2 control
+     * 
+     * @param arg: source-element
+     * @return (string) value(s) comma-separated
+     */
+    function getValues(srcElm) {
+        var res;
+        var obj = srcElm.select2('data');      // get delected data array
+
+        if (obj.length === 0)    return '';    // if empty list then nothig is selected
+        else {
+            var i = 0;
+            obj.forEach(function(elm){         // loop through object elements array
+
+                if (i)  res += ',' + elm.id;   // if not first item, prepend ',' befor value(id)
+                else    res = elm.id;        	 // else set (first) checked value
+
+                i++;
+            });
+        }
+        return res;
+    }
+
+    /** select2_set_text 
+     * --- -- -- - - -
+     * select an (select2-)option by text
+     * onto a (single) select2 control
+     * 
+     * @param control = jquery selector,
+     * @param t (string) = text of option
+     */
+    function select2_set_text(control, t) {
+        opts = control.select2()[0].options;
+        var id;
+        for(i=0; i<opts.length; i++) { if (opts[i].text == t) id = i; }
+        control.val(id).trigger('change');
+    }
+
+    /** get_id_of_text
+     * --- -- -- - - -
+     * get id (=value) of an option with `t` as text
+     * onto a select2 control;
+     * 
+     * Can be used on single or multiple select2 contols
+     * 
+     * @param control = jquery selector,
+     * @param t (string) = text of option
+     */
+    function get_id_of_text( control , t) {
+        opts = control.select2()[0].options;
+        var id = false;
+        for(i=0; i<opts.length; i++) { if (opts[i].text == t) id = i; }
+        return id;
+    }
+
+    /** select2_set_multi_text
+     * --- -- -- - - -
+     * select several (select2-)options by text
+     * 
+     * @param control  = jquery selector,
+     * @param t_list (string) = list of selected texts
+     */
+    function select2_set_multi_text(control, t_list) {   /* define function */
+        var ids = [];
+        t_list.forEach (t => { let id = get_id_of_text(control, t);
+            if (id !== false) ids.push(id);
+        })
+        control.val(ids).change();
+    }
+
+    /** selected_text
+     * --- -- -- - - -
+     * get selected text of a select2 control
+     */
+    function selected_text(control) {
+        if (typeof control.select2('data') === 'undefined') return false;
+        else if (control.select2('data').length == 0) return false;
+        else return control.select2('data')[0].text;
+    }
+
+    /**
+     * get all selected texts from a multi-select2 contol
+     */
+    function selected_multitexts(control) {
+        if (typeof control.select2('data') === 'undefined') return false;
+        else if (control.select2('data').length == 0) return false;
+        else {
+            var result = [];
+            control.select2('data').forEach( item => { result.push(item.text); });
+            return result;
+        }
+    }
+
+</script>
+\ No newline at end of file