catch read save area errors

docs/index.html

@@ -76,7 +76,7 @@
             <div class="input-buttons">
                 <!-- <button id="save-area-file" class="button" onclick="">Load Save</button> -->
                 <!-- <input id="save-area-file" class="" type="file" name="file" accept=".dat,.bak*" onchange="LoadSaveFile(this)"> -->
-                <button id="save-area-read" class="button" onclick="HKReadTextArea();">Analyze Text</button>
+                <button id="save-area-read" class="button" onclick="HKReadTextArea('save-area');">Analyze Text</button>
             </div>
 
             <div class="checkboxes">

src/index.html

@@ -76,7 +76,7 @@
             <div class="input-buttons">
                 <!-- <button id="save-area-file" class="button" onclick="">Load Save</button> -->
                 <!-- <input id="save-area-file" class="" type="file" name="file" accept=".dat,.bak*" onchange="LoadSaveFile(this)"> -->
-                <button id="save-area-read" class="button" onclick="HKReadTextArea();">Analyze Text</button>
+                <button id="save-area-read" class="button" onclick="HKReadTextArea('save-area');">Analyze Text</button>
             </div>
 
             <div class="checkboxes">

src/js/HKCheckCompletion.js

@@ -826,18 +826,24 @@ function CheckHintsTrue(divId, dataObject, playerData, worldData) {
 /**
  * Pre-Cleans HTML. Reads contents inside text area and parses it to a JavaScript object. If not empty, runs HKCheckCompletion() to check data.
  */
-function HKReadTextArea() {
+function HKReadTextArea(textAreaId = "") {
+
+    // refresh and prepare document for filling with data from the save
     InitialHTMLPopulate(HK.DIV_ID);
 
-    let textAreaId = "save-area";
     let contents = document.getElementById(textAreaId).value;
 
     if (contents.length) {
 
+        try {
             let jsonObject = JSON.parse(contents);
             // console.log(jsonObject);
             if (jsonObject.hasOwnProperty("playerData")) HKCheckCompletion(jsonObject);
             // console.log(jsonObject);
+        } catch (error) {
+            alert(`This seems like not a valid Hollow Knight save. ${error}`);
+            console.info(`This seems like not a valid Hollow Knight save. ${error}`);
+        }
     }
 }
 

src/js/LoadSaveFile.js

@@ -97,7 +97,7 @@ function ProcessFileObject() {
         console.info("LoadSaveFile() time (ms) =", benchLSFEnd - benchLSFBegin);
 
         // after pasting the decoded string, launch the main analyzing function immediately
-        HKReadTextArea();
+        HKReadTextArea("save-area");
 
         // finish total and show benchmark
         benchTotal = new Date();