Delete data on FHIR

 fixes ##101

efsity/src/main/java/org/smartregister/command/DeleteDataCommand.java

@@ -0,0 +1,95 @@
+package org.smartregister.command;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.SerializationFeature;
+
+import java.io.*;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.client.methods.HttpDelete;
+
+import org.smartregister.util.FctUtils;
+import picocli.CommandLine;
+
+@CommandLine.Command(name = "delete")
+public class DeleteDataCommand implements Runnable {
+  @CommandLine.Option(
+    names = {"-u", "--baseUrl"},
+    description =
+      "FHIR base URL example http://localhost:8888/fhir",
+    required = true)
+  String baseUrl;
+
+  @CommandLine.Option(
+    names = {"-r", "--resourceType"},
+    description = "Resource to be deleted",
+    required = true)
+  String resourceType;
+
+  @CommandLine.Option(
+    names = {"-id", "--identifiers"},
+    description = "Resource Identifiers if deleting a single resource",
+    required = true)
+  String identifiers;
+
+  @CommandLine.Option(
+    names = {"-at", "--access-token"},
+    description = "access token for fhir server")
+  String accessToken;
+
+  @Override
+  public void run() {
+    String url = baseUrl + "/" + resourceType + "?_id=" + identifiers + "&_cascade=delete";
+    FctUtils.printInfo("Starting deletion");
+
+    FctUtils.printInfo(String.format("URL: \u001b[35m%s\u001b[0m", url));
+
+    CloseableHttpClient httpClient = HttpClients.createDefault();
+    HttpDelete httpDelete = new HttpDelete(url);
+    httpDelete.setHeader("Content-Type", "application/fhir+json");
+    httpDelete.setHeader("Authorization", "Bearer " + accessToken);
+    try {
+      HttpResponse response = httpClient.execute(httpDelete);
+      int statusCode = response.getStatusLine().getStatusCode();
+      FctUtils.printToConsole("Response Status: " + statusCode);
+
+      if (statusCode == 200) {
+        handleSuccessfulResponse(response);
+      } else {
+        handleErrorResponse(response);
+      }
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    } finally {
+      try {
+        httpClient.close();
+      } catch (IOException e) {
+        FctUtils.printError(e.getMessage());
+      }
+    }
+  }
+  private void handleSuccessfulResponse(HttpResponse response) throws IOException {
+    ObjectMapper objectMapper = new ObjectMapper();
+    JsonNode rootNode = objectMapper.readTree(response.getEntity().getContent());
+
+    if (rootNode.has("issue")) {
+      ArrayNode issues = (ArrayNode) rootNode.get("issue");
+      for (JsonNode issue : issues) {
+        if (issue.has("diagnostics")) {
+          FctUtils.printToConsole("Diagnostics: " + issue.get("diagnostics").asText());
+        }
+      }
+    }
+  }
+
+  private void handleErrorResponse(HttpResponse response) throws IOException {
+    ObjectMapper objectMapper = new ObjectMapper().enable(SerializationFeature.INDENT_OUTPUT);
+    JsonNode rootNode = objectMapper.readTree(response.getEntity().getContent());
+    FctUtils.printToConsole("Error Response:");
+    FctUtils.printToConsole(objectMapper.writeValueAsString(rootNode));
+  }
+}