From 753650f81cccc592b7de5d98842c51e4093fa57d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Artur=20Ko=C5=82ecki?= <koleckiartur@icloud.com>
Date: Wed, 1 Mar 2023 16:02:38 +0100
Subject: [PATCH] Working json formatter with xml tags support.

---
 Backend/tools-services/pom.xml                |   6 +
 .../r11/tools/controller/JsonController.java  |  44 ++++-
 .../internal/RestControllerRegistry.java      |   7 +-
 .../controller/internal/path/PathBuilder.java |  30 ++++
 Frontend/assets/scripts/tools/json.js         |  35 ++--
 Frontend/tools/jsonFormatter.html             | 161 ++++++++++++++++++
 6 files changed, 268 insertions(+), 15 deletions(-)
 create mode 100644 Backend/tools-services/src/main/java/com/r11/tools/controller/internal/path/PathBuilder.java

diff --git a/Backend/tools-services/pom.xml b/Backend/tools-services/pom.xml
index 9ac56d7..6e02cfc 100644
--- a/Backend/tools-services/pom.xml
+++ b/Backend/tools-services/pom.xml
@@ -15,6 +15,7 @@
     <jackson.version>2.14.1</jackson.version>
     <slf4j.version>2.0.6</slf4j.version>
     <log4j.version>2.19.0</log4j.version>
+    <gson.version>2.10.1</gson.version>
   </properties>
 
   <build>
@@ -68,6 +69,11 @@
     </dependency>
 
     <!--    JSON    -->
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>${gson.version}</version>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
diff --git a/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java b/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
index 1e68949..8648ed8 100644
--- a/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
+++ b/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
@@ -1,5 +1,8 @@
 package com.r11.tools.controller;
 
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonObject;
 import com.r11.tools.controller.internal.GlobalControllerManifest;
 import com.r11.tools.controller.internal.HandlerType;
 import com.r11.tools.controller.internal.RestController;
@@ -7,11 +10,46 @@ import com.r11.tools.controller.internal.ScopedControllerManifest;
 import spark.Request;
 import spark.Response;
 
-@GlobalControllerManifest
+@GlobalControllerManifest(path = "/json")
 public class JsonController implements RestController {
 
-  @ScopedControllerManifest(method = HandlerType.GET, path = "/json")
+  private final Gson prettyGson = new GsonBuilder()
+      .disableHtmlEscaping()
+      .setPrettyPrinting()
+      .create();
+
+  private final Gson gson = new GsonBuilder()
+      .disableHtmlEscaping()
+      .create();
+
+  @ScopedControllerManifest(method = HandlerType.POST, path = "/formatting")
   public void formatting(Request request, Response response) {
-    response.body("Hello World!");
+    try {
+      JsonObject jsonObject = this.gson.fromJson(request.body(), JsonObject.class);
+      response.status(200);
+      response.body(this.prettyGson.toJson(jsonObject));
+      System.out.printf(response.body());
+    } catch (Exception e) {
+      response.status(500);
+      Throwable cause = e.getCause();
+      if (cause == null) {
+        response.body(e.getMessage());
+      } else {
+        response.body(cause.getMessage());
+      }
+      System.out.printf(response.body());
+    }
+  }
+
+  @ScopedControllerManifest(method = HandlerType.POST, path = "/minimize")
+  public void minimize(Request request, Response response) {
+    try {
+      JsonObject jsonObject = this.prettyGson.fromJson(request.body(), JsonObject.class);
+      response.status(200);
+      response.body(this.gson.toJson(jsonObject));
+    } catch (Exception e) {
+      response.status(500);
+      response.body(e.getMessage());
+    }
   }
 }
diff --git a/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/RestControllerRegistry.java b/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/RestControllerRegistry.java
index f27bacd..88bd537 100644
--- a/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/RestControllerRegistry.java
+++ b/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/RestControllerRegistry.java
@@ -1,5 +1,6 @@
 package com.r11.tools.controller.internal;
 
+import com.r11.tools.controller.internal.path.PathBuilder;
 import java.lang.reflect.Method;
 import java.util.HashSet;
 import java.util.Set;
@@ -33,7 +34,11 @@ public class RestControllerRegistry {
         (method.isAnnotationPresent(ScopedControllerManifest.class))
     ) {
       HandlerType handlerType = method.getAnnotation(ScopedControllerManifest.class).method();
-      String path = method.getAnnotation(ScopedControllerManifest.class).path();
+
+      String path = PathBuilder.resolvePathOf(
+          parent.getAnnotation(GlobalControllerManifest.class).path(),
+          method.getAnnotation(ScopedControllerManifest.class).path()
+      );
 
       switch (handlerType) {
         case GET:
diff --git a/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/path/PathBuilder.java b/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/path/PathBuilder.java
new file mode 100644
index 0000000..9f6c10f
--- /dev/null
+++ b/Backend/tools-services/src/main/java/com/r11/tools/controller/internal/path/PathBuilder.java
@@ -0,0 +1,30 @@
+package com.r11.tools.controller.internal.path;
+
+public final class PathBuilder {
+
+  private static final String PATH_SEPARATOR = "/";
+
+  private PathBuilder() {
+
+  }
+
+  public static String resolvePathOf(String globalPath, String scopedPath) {
+    String resolvedPath =
+        PathBuilder.removeTrailingPathSeparator(globalPath) +
+        PathBuilder.removeTrailingPathSeparator(scopedPath);
+
+    if (resolvedPath.endsWith(PATH_SEPARATOR)) {
+      resolvedPath = resolvedPath.substring(0, resolvedPath.length() - 1);
+    }
+
+    return PATH_SEPARATOR + resolvedPath;
+  }
+
+  private static String removeTrailingPathSeparator(String path) {
+    if (path.endsWith(PATH_SEPARATOR)) {
+      return path.substring(0, path.length() - 1);
+    }
+
+    return path;
+  }
+}
\ No newline at end of file
diff --git a/Frontend/assets/scripts/tools/json.js b/Frontend/assets/scripts/tools/json.js
index 6e448b1..1ce3473 100644
--- a/Frontend/assets/scripts/tools/json.js
+++ b/Frontend/assets/scripts/tools/json.js
@@ -1,21 +1,33 @@
 function formatAndValidateJson(errorElement) {
   const input = document.querySelector('#jsonBlock');
   const processInfo = document.getElementById(errorElement);
+  const start = new Date();
 
-  try {
-    const start = new Date();
+  const address = window.location.protocol + "//" + window.location.hostname + ":" + 8081 + "/json/formatting"
 
-    const obj = JSON.parse(input.textContent);
-    input.innerHTML = JSON.stringify(obj, null, 2);
+  fetch(address, {
+    method: 'POST',
+    body: input.textContent
+  })
+  .then(async (response) => {
+    if (!response.ok) {
+      throw Error(await response.text());
+    }
+
+    return response.text();
+  })
+  .then((data) => {
+    input.innerText = data;
     processInfo.innerText = "";
     hljs.highlightElement(input);
-
-    const end = new Date();
-    processInfo.innerHTML = "<b style='color: black'>Validation and formatting time:</b> <span style='color: green'>" + (end.getMilliseconds() - start.getMilliseconds()) + "ms</span>";
-  } catch (error) {
+  })
+  .catch((error) => {
     processInfo.innerHTML = "<b style='color: red'>" + error + "</b>";
-    console.error("Error: ", error)
-  }
+    console.error('Error:', error);
+  });
+
+  const end = new Date();
+  processInfo.innerHTML = "<b style='color: black'>Validation and formatting time:</b> <span style='color: green'>" + (end.getMilliseconds() - start.getMilliseconds()) + "ms</span>";
 }
 
 function minimizeJson(errorElement) {
@@ -31,7 +43,8 @@ function minimizeJson(errorElement) {
     hljs.highlightElement(input);
 
     const end = new Date();
-    processInfo.innerHTML = "<b style='color: black'>Validation and formatting time:</b> <span style='color: green'>" + (end.getMilliseconds() - start.getMilliseconds()) + "ms</span>";
+    processInfo.innerHTML = "<b style='color: black'>Validation and formatting time:</b> <span style='color: green'>"
+        + (end.getMilliseconds() - start.getMilliseconds()) + "ms</span>";
   } catch (error) {
     processInfo.innerHTML = "<b style='color: red'>" + error + "</b>";
     console.error("Error: ", error)
diff --git a/Frontend/tools/jsonFormatter.html b/Frontend/tools/jsonFormatter.html
index 4935d5c..8fe6ee2 100644
--- a/Frontend/tools/jsonFormatter.html
+++ b/Frontend/tools/jsonFormatter.html
@@ -52,6 +52,167 @@
     </div>
 
     <script>
+      const mergeHTMLPlugin = (function () {
+        'use strict';
+
+        var originalStream;
+
+        /**
+         * @param {string} value
+         * @returns {string}
+         */
+        function escapeHTML(value) {
+          return value
+          .replace(/&/g, '&amp;')
+          .replace(/</g, '&lt;')
+          .replace(/>/g, '&gt;')
+          .replace(/"/g, '&quot;')
+          .replace(/'/g, '&#x27;');
+        }
+
+        /* plugin itself */
+
+        /** @type {HLJSPlugin} */
+        const mergeHTMLPlugin = {
+          // preserve the original HTML token stream
+          "before:highlightElement": ({el}) => {
+            originalStream = nodeStream(el);
+          },
+          // merge it afterwards with the highlighted token stream
+          "after:highlightElement": ({el, result, text}) => {
+            if (!originalStream.length) {
+              return;
+            }
+
+            const resultNode = document.createElement('div');
+            resultNode.innerHTML = result.value;
+            result.value = mergeStreams(originalStream, nodeStream(resultNode), text);
+            el.innerHTML = result.value;
+          }
+        };
+
+        /**
+         * @param {Node} node
+         */
+        function tag(node) {
+          return node.nodeName.toLowerCase();
+        }
+
+        /**
+         * @param {Node} node
+         */
+        function nodeStream(node) {
+          /** @type Event[] */
+          const result = [];
+          (function _nodeStream(node, offset) {
+            for (let child = node.firstChild; child; child = child.nextSibling) {
+              if (child.nodeType === 3) {
+                offset += child.nodeValue.length;
+              } else if (child.nodeType === 1) {
+                result.push({
+                  event: 'start',
+                  offset: offset,
+                  node: child
+                });
+                offset = _nodeStream(child, offset);
+
+                if (!tag(child).match(/br|hr|img|input/)) {
+                  result.push({
+                    event: 'stop',
+                    offset: offset,
+                    node: child
+                  });
+                }
+              }
+            }
+            return offset;
+          })(node, 0);
+          return result;
+        }
+
+        /**
+         * @param {any} original - the original stream
+         * @param {any} highlighted - stream of the highlighted source
+         * @param {string} value - the original source itself
+         */
+        function mergeStreams(original, highlighted, value) {
+          let processed = 0;
+          let result = '';
+          const nodeStack = [];
+
+          function selectStream() {
+            if (!original.length || !highlighted.length) {
+              return original.length ? original : highlighted;
+            }
+            if (original[0].offset !== highlighted[0].offset) {
+              return (original[0].offset < highlighted[0].offset) ? original : highlighted;
+            }
+
+            return highlighted[0].event === 'start' ? original : highlighted;
+          }
+
+          /**
+           * @param {Node} node
+           */
+          function open(node) {
+            /** @param {Attr} attr */
+            function attributeString(attr) {
+              return ' ' + attr.nodeName + '="' + escapeHTML(attr.value) + '"';
+            }
+
+            // @ts-ignore
+            result += '<' + tag(node) + [].map.call(node.attributes, attributeString).join('')
+                + '>';
+          }
+
+          /**
+           * @param {Node} node
+           */
+          function close(node) {
+            result += '</' + tag(node) + '>';
+          }
+
+          /**
+           * @param {Event} event
+           */
+          function render(event) {
+            (event.event === 'start' ? open : close)(event.node);
+          }
+
+          while (original.length || highlighted.length) {
+            let stream = selectStream();
+            result += escapeHTML(value.substring(processed, stream[0].offset));
+            processed = stream[0].offset;
+            if (stream === original) {
+              /*
+              On any opening or closing tag of the original markup we first close
+              the entire highlighted node stack, then render the original tag along
+              with all the following original tags at the same offset and then
+              reopen all the tags on the highlighted stack.
+              */
+              nodeStack.reverse().forEach(close);
+              do {
+                render(stream.splice(0, 1)[0]);
+                stream = selectStream();
+              } while (stream === original && stream.length && stream[0].offset === processed);
+              nodeStack.reverse().forEach(open);
+            } else {
+              if (stream[0].event === 'start') {
+                nodeStack.push(stream[0].node);
+              } else {
+                nodeStack.pop();
+              }
+              render(stream.splice(0, 1)[0]);
+            }
+          }
+          return result + escapeHTML(value.substr(processed));
+        }
+
+        return mergeHTMLPlugin;
+
+      }());
+
+      hljs.addPlugin(mergeHTMLPlugin);
 
       const editorEle = document.getElementById('jsonBlock');