✔️ Delete Contact

src/main/java/com/sample/PostDeleteContact.java

@@ -0,0 +1,26 @@
+package com.sample;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+import static com.sample.Globals.respondPlain;
+
+@WebServlet(
+        urlPatterns = "/delete-contact"
+)
+public class PostDeleteContact extends HttpServlet {
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+
+        int id = Integer.parseInt(req.getParameter("id"));
+
+        OurData.THE_MAP.remove(id);
+
+        respondPlain(resp, 200, true, "{}");
+    }
+}

src/main/webapp/edit.js

@@ -23,6 +23,32 @@ form.onsubmit = function () {
   })
 }
 
+deleteButton.onclick = function () {
+  var button = this
+  if (button.getAttribute('data-state'))
+    return false
+  button.setAttribute('data-state', 'confirm')
+  if (!confirm('Really, delete this?')) {
+    button.removeAttribute('data-state')
+    return false
+  }
+  button.setAttribute('data-state', 'hold')
+  ajaxWave({
+    url: 'delete-contact' + location.search,
+    postdata: '',
+    callback: function (wave, request) {
+      if (request.status == 200 && wave.json) {
+        button.setAttribute('data-state', 'thanks')
+        location = './'
+      } else {
+        button.setAttribute('data-state', 'whoops')
+        alert(wave.text || wave.whoops)
+        button.removeAttribute('data-state')
+      }
+    },
+  })
+}
+
 function formData(form) {
   var data = ''
   for (var i = 0; i < form.elements.length; i++) {