#15 Count total view

Create Viewable interface
Set Article as Viewable
Create ES client
Now view article increment view count
Create index on start application

add an extention in ApplicationCall, to get citizen or return null

src/main/kotlin/fr/dcproject/utils/Elastic.kt

@@ -0,0 +1,29 @@
+package fr.dcproject.utils
+
+import com.jayway.jsonpath.JsonPath
+import com.jayway.jsonpath.PathNotFoundException
+import org.apache.http.util.EntityUtils
+import org.elasticsearch.client.Response
+import org.slf4j.LoggerFactory
+
+fun Response.contentToString(): String {
+    return EntityUtils.toString(this.entity)
+}
+
+fun Response.getField(jsonPath: String): Int? {
+    return try {
+        JsonPath.read(this.contentToString(), jsonPath)
+    } catch (e: PathNotFoundException) {
+        null
+    }
+}
+
+fun String.getJsonField(jsonPath: String): Int? {
+    return try {
+        JsonPath.read(this, jsonPath)
+    } catch (e: PathNotFoundException) {
+        LoggerFactory.getLogger("fr.dcproject.utils.getJsonField")
+            .warn("No value for Json path ${JsonPath.compile(jsonPath).path}")
+        null
+    }
+}