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/**
* YamlDumper dumps JS variables to YAML strings.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
var YamlDumper = function(){};
YamlDumper.prototype =
{
/**
* Dumps a JS value to YAML.
*
* @param mixed input The JS value
* @param integer inline The level where you switch to inline YAML
* @param integer indent The level o indentation indentation (used internally)
*
* @return string The YAML representation of the JS value
*/
dump: function(input, inline, indent)
{
if ( inline == undefined ) inline = 0;
if ( indent == undefined ) indent = 0;
var output = '';
var prefix = indent ? this.strRepeat(' ', indent) : '';
var yaml;
if ( inline <= 0 || !this.isObject(input) || this.isEmpty(input) )
{
yaml = new YamlInline();
output += prefix + yaml.dump(input);
}
else
{
var isAHash = !this.arrayEquals(this.getKeys(input), this.range(0,input.length - 1));
var willBeInlined;
for ( var key in input )
{
if ( input.hasOwnProperty(key) )
{
willBeInlined = inline - 1 <= 0 || !this.isObject(input[key]) || this.isEmpty(input[key]);
if ( isAHash ) yaml = new YamlInline();
output +=
prefix + '' +
(isAHash ? yaml.dump(key)+':' : '-') + '' +
(willBeInlined ? ' ' : "\n") + '' +
this.dump(input[key], inline - 1, (willBeInlined ? 0 : indent + 2)) + '' +
(willBeInlined ? "\n" : '');
}
}
}
return output;
},
strRepeat: function(str /* String */, count /* Integer */)
{
var i;
var result = '';
for ( i = 0; i < count; i++ ) result += str;
return result;
},
isObject: function(input)
{
return this.isDefined(input) && typeof(input) == 'object';
},
isEmpty: function(input)
{
var ret = input == undefined || input == null || input == '' || input == 0 || input == "0" || input == false;
if ( !ret && typeof(input) == "object" && !(input instanceof Array)){
var propCount = 0;
for ( var key in input )
if ( input.hasOwnProperty(key) ) propCount++;
ret = !propCount;
}
return ret;
},
isDefined: function(input)
{
return input != undefined && input != null;
},
getKeys: function(tab)
{
var ret = [];
for ( var name in tab )
{
if ( tab.hasOwnProperty(name) )
{
ret.push(name);
}
}
return ret;
},
range: function(start, end)
{
if ( start > end ) return [];
var ret = [];
for ( var i = start; i <= end; i++ )
{
ret.push(i);
}
return ret;
},
arrayEquals: function(a,b)
{
if ( a.length != b.length ) return false;
var len = a.length;
for ( var i = 0; i < len; i++ )
{
if ( a[i] != b[i] ) return false;
}
return true;
}
};
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