Add JSON obfuscator

utils/json_obfuscator.js

@@ -0,0 +1,100 @@
+// eslint-disable-next-line no-undef
+const fs = require("fs");
+const Survey = require("../js/survey.core.js");
+// eslint-disable-next-line no-undef
+let args = process.argv;
+if(!Array.isArray(args)) return;
+if(args.length < 3) {
+  // eslint-disable-next-line no-console
+  console.error("Please provide link to the survey JSON file");
+  return;
+}
+const fileName = args[2];
+fs.readFile(fileName, (err, data) => {
+    if (err) {
+        // eslint-disable-next-line no-console
+        console.error("Unable to read the file: " + err);
+        return;
+    }
+    const newJSON = obfuscateJSON(data);
+    const newFileName = fileName + ".obf";
+    fs.writeFile(newFileName, newJSON, err => {
+        if (err) {
+            // eslint-disable-next-line no-console
+            console.error(err);
+        } else {
+            // eslint-disable-next-line no-console
+            console.log("File generated correctly: " + newFileName);
+        }
+    });
+});
+
+function obfuscateJSON(data) {
+    const model = new Survey.Model(JSON.parse(data));
+    let questions = model.getAllQuestions();
+    questions.forEach( q => {
+        if(q.getType() === "html") {
+            q.delete();
+            return;
+        }
+        q.title = obfuscateText(q.title);
+        q.description = obfuscateText(q.description);
+        ["choices", "columns", "rows"].forEach(name => {
+            obfuscateArrayText(q[name]);
+        });            
+    });
+    questions = model.getAllQuestions();
+    const qNames = [];
+    let index = 1;
+    questions.forEach(q => {
+        const newName = "q" + index;
+        index ++;
+        const oldName = q.name;
+        q.name = newName;
+        qNames.push({ oldName: oldName, newName: newName });
+    });
+    let json = JSON.stringify(model.toJSON(), null, 2);
+    qNames.forEach(item => {
+        ["{", "{panel.", "{row."].forEach(prefix =>
+            json = renameQuestionInExpression(json, prefix + item.oldName, prefix + item.newName, ["}", "."])//, "/["])
+        );
+    });
+    return json;
+}
+function obfuscateArrayText(items) {
+    if(Array.isArray(items)) {
+        items.forEach(item => {
+            if(item.text) {
+                item.text = obfuscateText(item.text);
+            }
+            if(item.title) {
+                item.title = obfuscateText(item.title);
+            }
+        });
+    }
+}
+function obfuscateText(text) {
+    if(!text) return text;
+    let newText = "";
+    for(let i = 0; i < text.length; i ++) {
+        const ch = text[i];
+        let newCh = ch;
+        if(ch >= "a" &&  ch <= "z") newCh = getRandomChar("a", "z"); 
+        if(ch >= "A" &&  ch <= "Z") newCh = getRandomChar("A", "Z");
+        newText += newCh;
+    };
+    return newText;
+}
+function getRandomChar(min, max) {
+    const minI = min.codePointAt(0);
+    const maxI = max.codePointAt(0)
+    const val = Math.floor(Math.random() * (maxI - minI + 1)) + minI;
+    return String.fromCharCode(val);
+}
+function renameQuestionInExpression(json, oldName, newName, postFixes) {
+  postFixes.forEach(post => {
+    const re = new RegExp(oldName + post, "gi");
+    json = json.replace(re, newName + post);
+  });
+  return json;
+}