getBlogrollOptions.js

function getBlogrollOptions (headLevelAtts) {
	
	/*
	4/15/24; 8:58:41 AM by DW
		The author of the blog can enable a blogroll via three head-level attributes.
		We're looking for these --
			blogrollUsername -- required
			blogrollServer -- optional
			blogrollCategory -- optional
		Defaults
			If blogrollServer is not specified, we use feedland.com
			If blogrollCategory is not specified, we don't specify one in the URLs we generate
		We translate those values to the ones the blogroll software needs --
			urlSocketServer
			urlFeedlandViewBlogroll
			urlBlogrollOpml
		We return undefined if no blogroll is called for, otherwise it has the three values we transmit to the blogroll software. 
	*/
	
	const urlFeedlandCom = "https://feedland.com/";
	const wsUrlFeedlandCom = "wss://feedland.com:443/_ws/";
	
	var username = headLevelAtts.blogrollUsername;
	var urlServer = headLevelAtts.blogrollServer;
	var catname = headLevelAtts.blogrollCategory;
	
	var urlSocketServer, urlFeedlandViewBlogroll;
	
	if (username === undefined) { //username is required
		return (undefined);
		}
	else {
		username = trimWhitespace (username);
		if (username.length == 0) {
			return (undefined);
			}
		else {
			if (urlServer === undefined) {
				urlServer = urlFeedlandCom;
				}
			urlServer = trimWhitespace (urlServer);
			if (!endsWith (urlServer, "/")) {
				urlServer += "/";
				}
			if (catname !== undefined) {
				catname = trimWhitespace (catname);
				if (catname.length == 0) {
					catname = undefined;
					}
				}
			
			//set urlSocketServer
				if (urlServer == urlFeedlandCom) {
					urlSocketServer = "wss://feedland.com:443/_ws/";
					}
				else {
					urlSocketServer = replaceAll (urlServer, "https://", "wss://");
					}
			//set urlFeedlandViewBlogroll
				urlFeedlandViewBlogroll = urlServer + "?username=" + urlEncode (username);
				if (catname !== undefined) {
					urlFeedlandViewBlogroll +=  "&catname=" + urlEncode (catname);
					}
			//set urlBlogrollOpml
				urlBlogrollOpml = urlServer + "opml?screenname=" + urlEncode (username);
				if (catname !== undefined) {
					urlBlogrollOpml +=  "&catname=" + urlEncode (catname);
					}
			
			return ({urlSocketServer, urlFeedlandViewBlogroll, urlBlogrollOpml});
			}
		}
	}