tor: Implement BootstrapEventParser

network/tor/tor/src/main/java/bisq/tor/controller/BootstrapEventParser.java

@@ -0,0 +1,55 @@
+package bisq.tor.controller;
+
+import bisq.tor.controller.events.events.BootstrapEvent;
+
+import java.util.Optional;
+
+public class BootstrapEventParser {
+    public static Optional<BootstrapEvent> tryParse(String line) {
+        // 650 STATUS_CLIENT NOTICE BOOTSTRAP PROGRESS=50 TAG=loading_descriptors SUMMARY="Loading relay descriptors"
+        String[] parts = line.split(" ");
+
+        if (isBootstrapEvent(parts)) {
+            BootstrapEvent bootstrapEvent = parseBootstrapEvent(parts);
+            return Optional.of(bootstrapEvent);
+        }
+
+        return Optional.empty();
+    }
+
+
+    private static boolean isBootstrapEvent(String[] parts) {
+        // 650 STATUS_CLIENT NOTICE BOOTSTRAP PROGRESS=50 TAG=loading_descriptors SUMMARY="Loading relay descriptors"
+        return parts.length >= 7 && parts[3].equals("BOOTSTRAP");
+    }
+
+
+    private static BootstrapEvent parseBootstrapEvent(String[] parts) {
+        String progress = parts[4].replace("PROGRESS=", "");
+        String tag = parts[5].replace("TAG=", "");
+        String summary = parseBootstrapSummary(parts);
+
+        int progressInt = Integer.parseInt(progress);
+        return new BootstrapEvent(progressInt, tag, summary);
+    }
+
+    private static String parseBootstrapSummary(String[] parts) {
+        StringBuilder summary = new StringBuilder();
+
+        // SUMMARY="Loading relay descriptors" has whitespaces in string
+        for (int i = 6; i < parts.length; i++) {
+            String summaryPart = parts[i];
+            summary.append(summaryPart)
+                    .append(" ");
+        }
+
+        String summaryPrefix = "SUMMARY=\"";
+        summary.delete(0, summaryPrefix.length());
+
+        // ends with `" `
+        int length = summary.length();
+        summary.delete(length - 2, length);
+
+        return summary.toString();
+    }
+}