/home/edulekha/studygroup.edulekha.com/ow_plugins/photo/static/js/utils.js
window.photoUtils = Object.freeze({
extend: function( ctor, superCtor )
{
ctor._super = superCtor;
ctor.prototype = Object.create(superCtor.prototype, {
constructor: {
value: ctor,
enumerable: false,
writable: true,
configurable: true
}
});
},
bind: function( context )
{
return function( f )
{
return f.bind(context);
};
},
fluent: function( f )
{
return function()
{
f.apply(this, arguments);
return this;
};
},
truncate: function( value, limit, ended )
{
if ( !value ) return '';
value = String(value);
limit = +limit || 50;
ended = ended === undefined ? '...' : ended;
var parts;
if ( (parts = value.split('\n')).length >= 3 )
{
value = parts.slice(0, 3).join('\n') + ended;
}
else if ( value.length > limit )
{
value = value.substring(0, limit) + ended;
}
return value;
},
hashtagPattern: /#(?:\w|[^\u0000-\u007F])+/g,
getHashtags: function( text )
{
var result = {};
text.replace(this.hashtagPattern, function( str, offest )
{
result[offest] = str;
});
return result;
},
descToHashtag: function( description, hashtags, url )
{
var url = '<a href="' + url + '">{$tagLabel}</a>';
return description.replace(this.hashtagPattern, function( str, offest )
{
return (url.replace('-tag-', encodeURIComponent(hashtags[offest]))).replace('{$tagLabel}', str);
}).replace(/\n/g, '<br>');
},
includeScriptAndStyle: function( markup )
{
if ( !markup ) return;
if (markup.styleSheets)
{
$.each(markup.styleSheets, function(i, o)
{
OW.addCssFile(o);
});
}
if (markup.styleDeclarations)
{
OW.addCss(markup.styleDeclarations);
}
if (markup.beforeIncludes)
{
OW.addScript(markup.beforeIncludes);
}
if (markup.scriptFiles)
{
OW.addScriptFiles(markup.scriptFiles, function()
{
if (markup.onloadScript)
{
OW.addScript(markup.onloadScript);
}
});
}
else
{
if (markup.onloadScript)
{
OW.addScript(markup.onloadScript);
}
}
},
isEmptyArray: function( arr )
{
return !Array.isArray(arr) || arr.length === 0;
},
getObjectType: function( o )
{
return Object.prototype.toString.call(o).slice(8, -1);
},
getObjectValue: function( keys, object )
{
if ( !Array.isArray(keys) || this.getObjectType(object) !== 'Object' )
{
return {};
}
return keys.reduce(function( result, key )
{
var value = object[key];
if ( value !== undefined )
{
result[key] = value;
}
return result;
}, {});
}
});