/**
*
* Scans an HTML element for Microformats.org metadata.
* The resulting _object will contain an "items" property,
* an array of all Microformats items. Each item will
* have a "type" and "properties" properties.
*
* @param root the element to scan.
* @return a JSON _object containing Microformats metadata
*/
public static JSONObject getMicroformatsJSON(IElement root)
{
if((root)==null)throw new ArgumentNullException("root");
JSONObject obj=new JSONObject();
JSONArray items=new JSONArray();
propertyWalk(root,null,items);
obj.put("items", items);
return obj;
}
private static void propertyWalk(IElement root,
JSONObject properties, JSONArray children)
{
string[] className=getClassNames(root);
if(className.Length>0){
IList<string> types=new List<string>();
bool hasProperties=false;
foreach(var cls in className){
if(cls.StartsWith("p-",StringComparison.Ordinal) && properties!=null){
hasProperties=true;
} else if(cls.StartsWith("u-",StringComparison.Ordinal) && properties!=null){
hasProperties=true;
} else if(cls.StartsWith("dt-",StringComparison.Ordinal) && properties!=null){
hasProperties=true;
} else if(cls.StartsWith("e-",StringComparison.Ordinal) && properties!=null){
hasProperties=true;
} else if(cls.StartsWith("h-",StringComparison.Ordinal)){
types.Add(cls);
}
}
if(types.Count==0 && hasProperties){
// has properties and isn't a microformat
// root
foreach(var cls in className){
if(cls.StartsWith("p-",StringComparison.Ordinal)){
string value=getPValue(root);
if(!StringUtility.isNullOrSpaces(value)) {
accumulateValue(properties,cls.Substring(2),value);
}
} else if(cls.StartsWith("u-",StringComparison.Ordinal)){
accumulateValue(properties,cls.Substring(2),
getUValue(root));
} else if(cls.StartsWith("dt-",StringComparison.Ordinal)){
accumulateValue(properties,cls.Substring(3),
getDTValue(root,getLastKnownTime(properties)));
} else if(cls.StartsWith("e-",StringComparison.Ordinal)){
accumulateValue(properties,cls.Substring(2),
getEValue(root));
}
}
} else if(types.Count>0){
// this is a child microformat
// with no properties
JSONObject obj=new JSONObject();
obj.put("type", new JSONArray(types));
// for holding child elements with
// properties
JSONObject subProperties=new JSONObject();
// for holding child microformats with no
// property class
JSONArray subChildren=new JSONArray();
foreach(var child in root.getChildNodes()){
if(child is IElement) {
propertyWalk((IElement)child,
subProperties,subChildren);
}
}
if(subChildren.Length>0){
obj.put("children", subChildren);
}
if(types.Count>0){
// we imply missing properties here
// Imply p-name and p-url
if(!implyForLink(root,subProperties)){
if(hasSingleChildElementNamed(root,"a")){
implyForLink(getFirstChildElement(root),subProperties);
} else {
string pvalue=getPValue(root);
if(!StringUtility.isNullOrSpaces(pvalue)) {
setValueIfAbsent(subProperties,"name", pvalue);
}
}
}
// Also imply u-photo
if(StringUtility.toLowerCaseAscii(root.getLocalName()).Equals("img") &&
root.getAttribute("src")!=null){
setValueIfAbsent(subProperties,"photo", getUValue(root));
}
if(!subProperties.has("photo")){
IList<IElement> images=root.getElementsByTagName("img");
// If there is only one descendant image, imply
// u-photo
if(images.Count==1){
setValueIfAbsent(subProperties,"photo",
getUValue(images[0]));
}
}
}
obj.put("properties", subProperties);
if(hasProperties){
foreach(var cls in className){
if(cls.StartsWith("p-",StringComparison.Ordinal)){ // property
JSONObject clone=copyJson(obj);
clone.put("value",getPValue(root));
accumulateValue(properties,cls.Substring(2),clone);
} else if(cls.StartsWith("u-",StringComparison.Ordinal)){ // URL
JSONObject clone=copyJson(obj);
clone.put("value",getUValue(root));
accumulateValue(properties,cls.Substring(2),clone);
} else if(cls.StartsWith("dt-",StringComparison.Ordinal)){ // date/time
JSONObject clone=copyJson(obj);
clone.put("value",getDTValue(root,getLastKnownTime(properties)));
accumulateValue(properties,cls.Substring(3),clone);
} else if(cls.StartsWith("e-",StringComparison.Ordinal)){ // date/time
JSONObject clone=copyJson(obj);
clone.put("value",getEValue(root));
accumulateValue(properties,cls.Substring(2),clone);
}
}
} else {
children.put(obj);
}
return;
}
}
foreach(var child in root.getChildNodes()){
if(child is IElement) {
propertyWalk((IElement)child,properties,children);
}
}
}
private static int[] getLastKnownTime(JSONObject obj)
{
if(obj.has("start")){
JSONArray arr=obj.getJSONArray("start");
//Console.WriteLine("start %s",arr);
Object result=arr[arr.Length-1];
if(result is string){
int[] components=new int[]{
Int32.MinValue,
Int32.MinValue,
Int32.MinValue,
Int32.MinValue,
Int32.MinValue,
Int32.MinValue,
Int32.MinValue,
Int32.MinValue
};
if(matchDateTimePattern((string)result,
new string[]{"%Y-%M-%d","%Y-%D"},
new string[]{"%H:%m:%s","%H:%m",
"%H:%m:%s%Z:%z",
"%H:%m:%s%Z%z","%H:%m:%s%G",
"%H:%m%Z:%z","%H:%m%Z%z","%H:%m%G"},
components,true,true,true)){
// reset the time components
components[3]=Int32.MinValue;
components[4]=Int32.MinValue;
components[5]=Int32.MinValue;
components[6]=Int32.MinValue;
components[7]=Int32.MinValue;
//Console.WriteLine("match %s",Arrays.ToString(components));
return components;
} else {
//Console.WriteLine("no match");
}
}
}
return null;
}
private static bool implyForLink(IElement root, JSONObject subProperties)
{
if(StringUtility.toLowerCaseAscii(root.getLocalName()).Equals("a") &&
root.getAttribute("href")!=null){
// get the link's URL
setValueIfAbsent(subProperties,"url", getUValue(root));
IList<IElement> elements=getChildElements(root);
if(elements.Count==1 &&
StringUtility.toLowerCaseAscii(elements[0].getLocalName()).Equals("img")){
string pValue=getPValue(elements[0]); // try to get the ALT/TITLE from the image
if(StringUtility.isNullOrSpaces(pValue))
{
pValue=getPValue(root); // if empty, get text from link instead
}
setValueIfAbsent(subProperties,"name", pValue);
// get the SRC of the image
setValueIfAbsent(subProperties,"photo", getUValue(elements[0]));
} else {
// get the text content
string pvalue=getPValue(root);
if(!StringUtility.isNullOrSpaces(pvalue)) {
setValueIfAbsent(subProperties,"name", pvalue);
}
}
return true;
}
return false;
}
private static void accumulateValue(JSONObject obj, string key, Object value)
{
JSONArray arr=null;
if(obj.has(key)){
arr=obj.getJSONArray(key);
} else {
arr=new JSONArray();
obj.put(key, arr);
}
arr.put(value);
}
private static JSONObject copyJson(JSONObject obj)
{
try {
return new JSONObject(obj.ToString());
} catch(Json.InvalidJsonException){
return null;
}
}
private static void relWalk(IElement root,
JSONObject properties)
{
string[] className=getRelNames(root);
if(className.Length>0){
string href=getHref(root);
if(!StringUtility.isNullOrSpaces(href)){
foreach(var cls in className){
accumulateValue(properties,cls,href);
}
}
}
foreach(var child in root.getChildNodes()){
if(child is IElement) {
relWalk((IElement)child,properties);
}
}
}
private static void setValueIfAbsent(JSONObject obj, string key, Object value)
{
if(!obj.has(key)){
JSONArray arr=null;
arr=new JSONArray();
obj.put(key, arr);
arr.put(value);
}
}
public static JSONObject getRelJSON(IElement root)
{
if((root)==null)throw new ArgumentNullException("root");
JSONObject obj=new JSONObject();
JSONArray items=new JSONArray();
JSONObject item=new JSONObject();
accumulateValue(item,"type","rel");
JSONObject props=new JSONObject();
relWalk(root,props);
item.put("properties", props);
items.put(item);
obj.put("items", items);
return obj;
}
public void writeObjectToStream(CacheControl o, Stream stream)
{
JSONObject jsonobj=new JSONObject();
jsonobj.put("cacheability",o.cacheability);
jsonobj.put("noStore",o.noStore);
jsonobj.put("noTransform",o.noTransform);
jsonobj.put("mustRevalidate",o.mustRevalidate);
jsonobj.put("requestTime",Convert.ToString(o.requestTime,CultureInfo.InvariantCulture));
jsonobj.put("responseTime",Convert.ToString(o.responseTime,CultureInfo.InvariantCulture));
jsonobj.put("maxAge",Convert.ToString(o.maxAge,CultureInfo.InvariantCulture));
jsonobj.put("date",Convert.ToString(o.date,CultureInfo.InvariantCulture));
jsonobj.put("uri",o.uri);
jsonobj.put("requestMethod",o.requestMethod);
jsonobj.put("code",o.code);
jsonobj.put("age",Convert.ToString(o.age,CultureInfo.InvariantCulture));
JSONArray jsonarr=new JSONArray();
foreach(var header in o.headers){
jsonarr.put(header);
}
jsonobj.put("headers",jsonarr);
StreamUtility.stringToStream(jsonobj.ToString(),stream);
}
public CacheControl readObjectFromStream(PeterO.Support.InputStream stream)
{
try {
JSONObject jsonobj=new JSONObject(StreamUtility.streamToString(stream));
CacheControl cc=new CacheControl();
cc.cacheability=jsonobj.getInt("cacheability");
cc.noStore=jsonobj.getBoolean("noStore");
cc.noTransform=jsonobj.getBoolean("noTransform");
cc.mustRevalidate=jsonobj.getBoolean("mustRevalidate");
cc.requestTime=Int64.Parse(jsonobj.getString("requestTime"),NumberStyles.AllowLeadingSign,CultureInfo.InvariantCulture);
cc.responseTime=Int64.Parse(jsonobj.getString("responseTime"),NumberStyles.AllowLeadingSign,CultureInfo.InvariantCulture);
cc.maxAge=Int64.Parse(jsonobj.getString("maxAge"),NumberStyles.AllowLeadingSign,CultureInfo.InvariantCulture);
cc.date=Int64.Parse(jsonobj.getString("date"),NumberStyles.AllowLeadingSign,CultureInfo.InvariantCulture);
cc.code=jsonobj.getInt("code");
cc.age=Int64.Parse(jsonobj.getString("age"),NumberStyles.AllowLeadingSign,CultureInfo.InvariantCulture);
cc.uri=jsonobj.getString("uri");
cc.requestMethod=jsonobj.getString("requestMethod");
if(cc.requestMethod!=null) {
cc.requestMethod=StringUtility.toLowerCaseAscii(cc.requestMethod);
}
cc.headers=new List<string>();
JSONArray jsonarr=jsonobj.getJSONArray("headers");
for(int i=0;i<jsonarr.Length;i++){
string str=jsonarr.getString(i);
if(str!=null && (i%2)!=0){
str=StringUtility.toLowerCaseAscii(str);
if("age".Equals(str) ||
"connection".Equals(str) ||
"keep-alive".Equals(str) ||
"proxy-authenticate".Equals(str) ||
"proxy-authorization".Equals(str) ||
"te".Equals(str) ||
"trailers".Equals(str) ||
"transfer-encoding".Equals(str) ||
"upgrade".Equals(str)){
// Skip "age" header field and
// hop-by-hop header fields
i++;
continue;
}
}
cc.headers.Add(str);
}
return cc;
} catch(InvalidCastException e){
Console.WriteLine(e.StackTrace);
return null;
} catch(FormatException e){
Console.WriteLine(e.StackTrace);
return null;
} catch (Json.InvalidJsonException e) {
Console.WriteLine(e.StackTrace);
return null;
}
}
private static string getString(JSONObject o, string key)
{
try {
return o.getString(key);
} catch(System.Collections.Generic.KeyNotFoundException){
return null;
}
}
/**
* Produce a JSONObject by combining a JSONArray of names with the values
* of this JSONArray.
* @param names A JSONArray containing a list of key strings. These will be
* paired with the values.
* @return A JSONObject, or null if there are no names or if this JSONArray
* has no values.
*/
public JSONObject toJSONObject(JSONArray names)
{
if (names == null || names.Length == 0 || length() == 0)
return null;
JSONObject jo = new JSONObject();
for (int i = 0; i < names.Length; i += 1) {
jo.put(names.getString(i), opt(i));
}
return jo;
}
