1 files changed, 73 insertions, 0 deletions
diff --git a/src/com/isode/stroke/disco/CapsInfoGenerator.java b/src/com/isode/stroke/disco/CapsInfoGenerator.java
new file mode 100644
index 0000000..2bbd843
--- /dev/null
+++ b/src/com/isode/stroke/disco/CapsInfoGenerator.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2010-2015, Isode Limited, London, England.
+ * All rights reserved.
+ */
+package com.isode.stroke.disco;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import com.isode.stroke.base.ByteArray;
+import com.isode.stroke.crypto.CryptoProvider;
+import com.isode.stroke.elements.CapsInfo;
+import com.isode.stroke.elements.DiscoInfo;
+import com.isode.stroke.elements.Form;
+import com.isode.stroke.elements.FormField;
+import com.isode.stroke.stringcodecs.Base64;
+
+public class CapsInfoGenerator {
+    private String node_;
+    private CryptoProvider crypto_;
+
+    private final static Comparator<FormField> compareFields = new Comparator<FormField>() {
+        @Override
+        public int compare(FormField lhs, FormField rhs) {
+            return lhs.getName().compareTo(rhs.getName());
+        }
+    };
+
+    CapsInfoGenerator(final String node, CryptoProvider crypto) {
+        this.node_ = node;
+        this.crypto_ = crypto;
+    }
+
+    CapsInfo generateCapsInfo(final DiscoInfo discoInfo) {
+        String serializedCaps = "";
+
+        List<DiscoInfo.Identity> identities = discoInfo.getIdentities();
+        Collections.sort(identities);
+        for (final DiscoInfo.Identity identity : identities) {
+            serializedCaps += identity.getCategory() + "/" + identity.getType()
+                    + "/" + identity.getLanguage() + "/" + identity.getName()
+                    + "<";
+        }
+
+        List<String> features = discoInfo.getFeatures();
+        Collections.sort(features);
+        for (final String feature : features) {
+            serializedCaps += feature + "<";
+        }
+
+        for (Form extension : discoInfo.getExtensions()) {
+            serializedCaps += extension.getFormType() + "<";
+            List<FormField> fields = extension.getFields();
+            Collections.sort(fields, compareFields);
+            for (FormField field : fields) {
+                if ("FORM_TYPE".equals(field.getName())) {
+                    continue;
+                }
+                serializedCaps += field.getName() + "<";
+                List<String> values = field.getValues();
+                Collections.sort(values);
+                for (final String value : values) {
+                    serializedCaps += value + "<";
+                }
+            }
+        }
+
+        String version = Base64.encode(crypto_ .getSHA1Hash(new ByteArray(serializedCaps)));
+        return new CapsInfo(node_, version, "sha-1");
+    }
+
+}