59 lines
2 KiB
JavaScript
59 lines
2 KiB
JavaScript
function jsonT(self, rules) {
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var T = {
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output: false,
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init: function() {
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for (var rule in rules)
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if (rule.substr(0,4) != "self")
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rules["self."+rule] = rules[rule];
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return this;
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},
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apply: function(expr) {
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var trf = function(s){ return s.replace(/{([A-Za-z0-9_\$\.\[\]\'@\(\)]+)}/g,
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function($0,$1){return T.processArg($1, expr);})},
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x = expr.replace(/\[[0-9]+\]/g, "[*]"), res;
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if (x in rules) {
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if (typeof(rules[x]) == "string")
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res = trf(rules[x]);
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else if (typeof(rules[x]) == "function")
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res = trf(rules[x](eval(expr)).toString());
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}
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else
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res = T.eval(expr);
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return res;
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},
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processArg: function(arg, parentExpr) {
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var expand = function(a,e){return (e=a.replace(/^\$/,e)).substr(0,4)!="self" ? ("self."+e) : e; },
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res = "";
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T.output = true;
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if (arg.charAt(0) == "@")
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res = eval(arg.replace(/@([A-za-z0-9_]+)\(([A-Za-z0-9_\$\.\[\]\']+)\)/,
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function($0,$1,$2){return "rules['self."+$1+"']("+expand($2,parentExpr)+")";}));
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else if (arg != "$")
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res = T.apply(expand(arg, parentExpr));
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else
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res = T.eval(parentExpr);
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T.output = false;
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return res;
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},
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eval: function(expr) {
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var v = eval(expr), res = "";
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if (typeof(v) != "undefined") {
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if (v instanceof Array) {
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for (var i=0; i<v.length; i++)
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if (typeof(v[i]) != "undefined")
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res += T.apply(expr+"["+i+"]");
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}
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else if (typeof(v) == "object") {
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for (var m in v)
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if (typeof(v[m]) != "undefined")
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res += T.apply(expr+"."+m);
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}
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else if (T.output)
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res += v;
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}
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return res;
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}
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};
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return T.init().apply("self");
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}
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