grab json representation of a site's OG tags

ogParse.js

function ogTags(nodes, nodeList) {
	for(idx in nodeList)
		if(validTag(nodeList[idx]))
			nodes.push(nodeList[idx])
	return nodes
}

function validTag(node) {
	var attrs = node.attributes
	return attrs && attrs.property && attrs.property.value.search(/og:*/) != -1
}

function nodeFields(nodeAttrs) {
	return [
		nodeAttrs.property.value.slice(3),
		nodeAttrs.content.value
	]
}

function ogTagJson(obj, nodeList) {
	ogTags([], nodeList).forEach(function(node){
		var fields = nodeFields(node.attributes)
		obj[fields[0]] = fields[1]
	})
	return obj
}

ogTagJson({}, window.document.getElementsByTagName("meta"))