/**
* CMS Airship - Global Javascript Routines
*/
window.Airship = {
// Escaping contexts
"E_HTML": "html",
"E_HTML_ATTR": "html_attr",
"E_URL": "url",
// Filters (anythine that matches these regexes gets filtered out):
"FILTER_ALPHA": /[^A-Za-z]+/,
"FILTER_ALPHANUMERIC": /[^A-Za-z0-9]+/,
"FILTER_ID": /[^A-Za-z0-9_\-]+/,
"FILTER_NUMERIC": /[^0-9]+/,
/**
* @param x
* @param {string} type
* @returns {boolean}
*/
"assertType": function(x, type) {
if (typeof x !== type) {
throw TypeError("Expected " + type + ", got " + (typeof x));
}
return true;
},
/**
* @param {string} a
* @returns {string}
*/
"e": function (a) {
if (arguments.length > 1) {
return this.escape(a, arguments[1]);
}
return this.escape(a, Airship.E_HTML_ATTR);
},
/**
* @param {string} input
* @param {string} context Optional.
* @returns {string}
*/
"escape": function (input, context) {
if (typeof context === 'undefined') {
return '';
}
this.assertType(input, 'string');
if (context === this.E_HTML) {
return this.escapeHtmlContext(input);
} else if (context === this.E_URL) {
return this.escapeUrlContext(input);
} else {
return this.escapeHtmlAttributeContext(input);
}
},
/**
* Escape this string in an HTML context
*
* @param {string} input
* @returns {string}
*/
"escapeHtmlContext": function (input) {
return input
.replace(/&/g, "&")
.replace(/\//g, "/")
.replace(/</g, "<")
.replace(/>/g, ">")
.replace(/"/g, """)
.replace(/'/g, "'")
;
},
/**
* Escape this string in an HTML attribute context
*
* @param {string} input
* @returns {string}
*/
"escapeHtmlAttributeContext": function (input) {
return this.escapeHtmlContext(input)
.replace(/`/g, "`")
.replace(/=/g, "=")
;
},
/**
* Escape this string in a URL context
*
* @param {string} input
* @returns {string}
*/
"escapeUrlContext": function (input) {
this.assertType(input, 'string');
return encodeURIComponent(input);
},
/**
* Filter out certain characters from the input string.
* This fails closed by returning an empty string.
*
* @param {string} input
* @param {RegExp} filter_out
* @returns {string}
*/
"filter": function (input, filter_out) {
if (typeof filter_out === 'undefined') {
return '';
}
if (!(filter_out instanceof RegExp)) {
return '';
}
this.assertType(input, 'string');
return input.replace(filter_out, '');
}
};
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