feat: add support for permanentid generation (#12)

https://coveord.atlassian.net/browse/CDX-437

Author: olamothe

pom.xml

@@ -29,6 +29,11 @@
             <version>4.12</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>1.9</version>
+        </dependency>
 
 
     </dependencies>

src/main/java/com/coveo/pushapiclient/DocumentBuilder.java

@@ -2,6 +2,7 @@
 
 import com.google.gson.Gson;
 import com.google.gson.JsonObject;
+import org.apache.commons.codec.digest.DigestUtils;
 import org.joda.time.DateTime;
 import org.joda.time.format.ISODateTimeFormat;
 
@@ -161,6 +162,8 @@ public String marshal() {
     }
 
     public JsonObject marshalJsonObject() {
+        this.generatePermanentId();
+
         JsonObject jsonDocument = new Gson().toJsonTree(this.document).getAsJsonObject();
         this.document.metadata.forEach((key, value) -> {
             jsonDocument.add(key, new Gson().toJsonTree(value));
@@ -195,4 +198,10 @@ private void validateReservedMetadataKeyNames(String key) {
             throw new RuntimeException(String.format("Cannot use %s as a metadata key: It is a reserved keynames. See https://docs.coveo.com/en/78/index-content/push-api-reference#json-document-reserved-key-names", key));
         }
     }
+
+    private void generatePermanentId() {
+        if (this.document.permanentId == null) {
+            this.document.permanentId = DigestUtils.sha256Hex(this.document.uri);
+        }
+    }
 }

src/test/java/com/coveo/pushapiclient/DocumentBuilderTest.java

@@ -132,7 +132,10 @@ public void testWithPermanentId() {
 
     @Test
     public void testWithPermanentIdGeneration() {
-        // TODO
+        assertTrue(
+                "permanentId should be generated automatically if not set",
+                docBuilder.marshalJsonObject().get("permanentId").getAsString().length() > 0
+        );
     }
 
     @Test