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var toString = Object.prototype.toString;
var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack'];
export function Exception(message) {
var tmp = Error.prototype.constructor.apply(this, arguments);
// Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work.
for (var idx = 0; idx < errorProps.length; idx++) {
this[errorProps[idx]] = tmp[errorProps[idx]];
}
};
Exception.prototype = new Error();
// Build out our basic SafeString type
export function SafeString(string) {
this.string = string;
};
SafeString.prototype.toString = function() {
return "" + this.string;
};
var escape = {
"&": "&",
"<": "<",
">": ">",
'"': """,
"'": "'",
"`": "`"
};
var badChars = /[&<>"'`]/g;
var possible = /[&<>"'`]/;
var escapeChar = function(chr) {
return escape[chr] || "&";
};
export function extend(obj, value) {
for(var key in value) {
if(value.hasOwnProperty(key)) {
obj[key] = value[key];
}
}
}
export function escapeExpression(string) {
// don't escape SafeStrings, since they're already safe
if (string instanceof SafeString) {
return string.toString();
} else if (string == null || string === false) {
return "";
}
// Force a string conversion as this will be done by the append regardless and
// the regex test will do this transparently behind the scenes, causing issues if
// an object's to string has escaped characters in it.
string = "" + string;
if(!possible.test(string)) { return string; }
return string.replace(badChars, escapeChar);
}
export function isEmpty(value) {
if (!value && value !== 0) {
return true;
} else if(toString.call(value) === "[object Array]" && value.length === 0) {
return true;
} else {
return false;
}
}
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