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var logged = {};
/**
Log a deprecated notice
@param {Book|Output} book
@param {String} key
@param {String} message
*/
function logNotice(book, key, message) {
if (logged[key]) return;
logged[key] = true;
var logger = book.getLogger();
logger.warn.ln(message);
}
/**
Deprecate a function
@param {Book|Output} book
@param {String} key: unique identitifer for the deprecated
@param {Function} fn
@param {String} msg: message to print when called
@return {Function}
*/
function deprecateMethod(book, key, fn, msg) {
return function() {
logNotice(book, key, msg);
return fn.apply(this, arguments);
};
}
/**
Deprecate a property of an object
@param {Book|Output} book
@param {String} key: unique identitifer for the deprecated
@param {Object} instance
@param {String} property
@param {String} msg: message to print when called
@return {Function}
*/
function deprecateField(book, key, instance, property, value, msg) {
var getter = function(){
logNotice(book, key, msg);
return value;
};
var setter = function(v) {
logNotice(book, key, msg);
value = v;
return value;
};
Object.defineProperty(instance, property, {
get: getter,
set: setter,
enumerable: true
});
}
module.exports = {
method: deprecateMethod,
field: deprecateField
};
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