Version 20.4, May 2021

[GpsPrune.git] / src / tim / prune / gui / map / SiteNameUtils.java

diff --git a/src/tim/prune/gui/map/SiteNameUtils.java b/src/tim/prune/gui/map/SiteNameUtils.java
new file mode 100644 (file)
index 0000000..cf53f72
--- /dev/null
+++ b/src/tim/prune/gui/map/SiteNameUtils.java
@@ -0,0 +1,73 @@
+package tim.prune.gui.map;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Helper functions for manipulating tile site names
+ */
+public abstract class SiteNameUtils
+{
+       /** Regular expression for catching server wildcards */
+       private static final Pattern WILD_PATTERN = Pattern.compile("^(.*)\\[(.*)\\](.*)$");
+
+
+       /**
+        * If the base url contains something like [1234], then pick a server
+        * @param inBaseUrl base url
+        * @return modified base url
+        */
+       public static String pickServerUrl(String inBaseUrl)
+       {
+               if (inBaseUrl == null || inBaseUrl.indexOf('[') < 0) {
+                       return inBaseUrl;
+               }
+               // Check for [.*] (once only)
+               // Only need to support one, make things a bit easier
+               final Matcher matcher = WILD_PATTERN.matcher(inBaseUrl);
+               // if not, return base url unchanged
+               if (!matcher.matches()) {
+                       return inBaseUrl;
+               }
+               // if so, pick one at random and replace in the String
+               final String match = matcher.group(2);
+               final int numMatches = match.length();
+               String server = null;
+               if (numMatches > 0)
+               {
+                       int matchNum = (int) Math.floor(Math.random() * numMatches);
+                       server = "" + match.charAt(matchNum);
+               }
+               final String result = matcher.group(1) + (server==null?"":server) + matcher.group(3);
+               return result;
+       }
+
+
+       /**
+        * Fix the site name by stripping off protocol and www.
+        * This is used to create the file path for disk caching
+        * @param inUrl url to strip
+        * @return stripped url
+        */
+       public static String convertUrlToDirectory(String inUrl)
+       {
+               if (inUrl == null || inUrl.equals("")) {return null;}
+               String url = inUrl.toLowerCase();
+               int idx = url.indexOf("://");
+               if (idx >= 0) {url = url.substring(idx + 3);}
+               if (url.startsWith("www.")) {url = url.substring(4);}
+               // Strip out any "[.*]" as well
+               if (url.indexOf('[') >= 0)
+               {
+                       Matcher matcher = WILD_PATTERN.matcher(url);
+                       if (matcher.matches())
+                       {
+                               url = matcher.group(1) + matcher.group(3);
+                               if (url.length() > 1 && url.charAt(0) == '.') {
+                                       url = url.substring(1);
+                               }
+                       }
+               }
+               return url;
+       }
+}