check host subdomains too

fixes #370

app/src/main/java/com/trianguloy/urlchecker/modules/companions/Hosts.java

@@ -9,7 +9,6 @@ import com.trianguloy.urlchecker.R;
 import com.trianguloy.urlchecker.utilities.generics.JsonCatalog;
 import com.trianguloy.urlchecker.utilities.methods.HttpUtils;
 import com.trianguloy.urlchecker.utilities.methods.JavaUtils;
-import com.trianguloy.urlchecker.utilities.methods.StreamUtils;
 import com.trianguloy.urlchecker.utilities.wrappers.InternalFile;
 import com.trianguloy.urlchecker.utilities.wrappers.ProgressDialog;
 
@@ -19,9 +18,7 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 
-/**
+/** Represents and manages the hosts data */
- * Represents and manages the hosts data
- */
 public class Hosts {
 
     private final HostsCatalog data;
@@ -39,9 +36,7 @@ public class Hosts {
         data = new HostsCatalog(cntx);
     }
 
-    /**
+    /** Builds the hosts database (asks first) */
-     * Builds the hosts database (asks first)
-     */
     public void build(boolean showEditor, Runnable onFinished) {
         var builder = new AlertDialog.Builder(cntx)
                 .setTitle(R.string.mHosts_buildTitle)
@@ -60,16 +55,12 @@ public class Hosts {
         builder.show();
     }
 
-    /**
+    /** @see JsonCatalog#showEditor */
-     * @see JsonCatalog#showEditor
-     */
     public void showEditor() {
         data.showEditor();
     }
 
-    /**
+    /** Background thread that builds the database (and notifies progress) */
-     * Background thread that builds the database (and notifies progress)
-     */
     private void _build(ProgressDialog progress, Runnable onFinished) {
         var catalog = data.getCatalog();
 
@@ -149,17 +140,21 @@ public class Hosts {
         });
     }
 
-    /**
+    /** return true if the database is built */
-     * return true if the database is built
-     */
     public boolean isUninitialized() {
         return buckets.isEmpty() && getFileNames().isEmpty();
     }
 
-    /**
+    /** Returns the label and color for the host, or bigger partial host (no subdomain). null if not in the database */
-     * Returns the label and color for the host, null if not in the database
-     */
     public Pair<String, String> contains(String host) {
+        var contains = containsExact(host);
+        if (contains != null) return contains;
+        if (!host.contains(".")) return null; // no more subdomains to check
+        return contains(host.split("\\.", 2)[1]); // remove leftmost subdomain
+    }
+
+    /** Returns the label and color for the exact host, null if not in the database */
+    public Pair<String, String> containsExact(String host) {
         return getBucket(host, key -> {
             var values = new HashMap<String, Pair<String, String>>();
             new InternalFile(PREFIX + key, cntx).stream(line -> {
@@ -173,9 +168,7 @@ public class Hosts {
 
     /* ------------------- internal ------------------- */
 
-    /**
+    /** returns all the files from this database */
-     * returns all the files from this database
-     */
     private ArrayList<String> getFileNames() {
         var files = new ArrayList<String>();
         for (var fileName : cntx.fileList()) {
@@ -184,11 +177,9 @@ public class Hosts {
         return files;
     }
 
-    /**
+    /** The number of hosts. */
-     * The number of hosts.
-     * I miss streams :(
-     */
     public int size() {
+        // I miss streams :(
         var s = 0;
         for (var value : buckets.values()) {
             s += value.size();
@@ -205,9 +196,7 @@ public class Hosts {
         if (replace || !bucket.containsKey(host)) bucket.put(host, data);
     }
 
-    /**
+    /** returns the bucket of a value, if not ready computes it */
-     * returns the bucket of a value, if not ready computes it
-     */
     private HashMap<String, Pair<String, String>> getBucket(String value, JavaUtils.Function<Integer, HashMap<String, Pair<String, String>>> compute) {
         // HASHING
         var hash = Math.floorMod(value.hashCode(), FILES);