Initial dev repository

[kcls-web.git] / opac / common / js / fmgen.js

diff --git a/opac/common/js/fmgen.js b/opac/common/js/fmgen.js
new file mode 100644 (file)
index 0000000..bf67355
--- /dev/null
+++ b/opac/common/js/fmgen.js
@@ -0,0 +1,66 @@
+/* generate fieldmapper javascript classes.  This expects a global variable
+       called 'fmclasses' to be fleshed with the classes we need to build */
+
+function Fieldmapper() {}
+
+var errorstr = "Attempt to build fieldmapper object with non-array";
+
+Fieldmapper.prototype.clone = function() {
+       var obj = new this.constructor();
+
+       for( var i in this.a ) {
+               var thing = this.a[i];
+               if(thing == null) continue;
+
+               if( thing._isfieldmapper ) {
+                       obj.a[i] = thing.clone();
+               } else {
+
+                       if(instanceOf(thing, Array)) {
+                               obj.a[i] = new Array();
+
+                               for( var j in thing ) {
+
+                                       if( thing[j]._isfieldmapper )
+                                               obj.a[i][j] = thing[j].clone();
+                                       else
+                                               obj.a[i][j] = thing[j];
+                               }
+                       } else {
+                               obj.a[i] = thing;
+                       }
+               }
+       }
+       return obj;
+}
+
+function FMEX(message) { this.message = message; }
+FMEX.toString = function() { return "FieldmapperException: " + this.message + "\n"; }
+
+var string = "";
+for( var cl in fmclasses ) {
+       string += cl + ".prototype = new Fieldmapper(); " + 
+                                               cl + ".prototype.constructor = " + cl + ";" +
+                                               cl + ".baseClass = Fieldmapper.constructor;" +
+                                               "function " + cl + "(a) { " +
+                                                       "this.classname = \"" + cl + "\";" +
+                                                       "this._isfieldmapper = true;" +
+                                                       "if(a) { if(a.constructor == Array) this.a = a; else throw new FMEX(errorstr);} else this.a = []}"; 
+
+       string += cl + "._isfieldmapper=true;";
+
+       fmclasses[cl].push('isnew');
+       fmclasses[cl].push('ischanged');
+       fmclasses[cl].push('isdeleted');
+
+       for( var pos in fmclasses[cl] ) {
+               var p = parseInt(pos);
+               var field = fmclasses[cl][pos];
+               string += cl + ".prototype." + field + 
+                       "=function(n){if(arguments.length == 1)this.a[" + 
+                       p + "]=n;return this.a[" + p + "];};";
+       }
+}
+eval(string);
+
+