Added typescript to etherpad

* Fixed determining file extension.

* Added ts-node

* Fixed backend tests.

* Fixed frontend test runs.

* Fixed tests.

* Use script approach for starting etherpad.

* Change directory to src.

* Fixed env.

* Change directory

* Fixed build arg.

* Fixed docker build.

* Fixed.

* Fixed cypress file path.

* Fixed.

* Use latest node container.

* Fixed windows workflow.

* Use tsx and optimized docker image.

* Added workflow for type checks.

* Fixed.

* Added tsconfig.

* Converted more files to typescript.

* Removed commented keys.

* Typed caching middleware.

* Added script for checking the types.

* Moved SecretRotator to typescript.

* Fixed npm installation and moved to types folder.

* Use better scripts for watching typescript changes.

* Update windows.yml

* Fixed order of npm installation.

* Converted i18n.

* Added more types.

* Added more types.

* Fixed import.

* Fixed tests.

* Fixed tests.

* Fixed type checking test.

* Fixed stats

* Added express types.

* fixed.

src/node/utils/ExportHelper.ts

@@ -0,0 +1,91 @@
+'use strict';
+/**
+ * Helpers for export requests
+ */
+
+/*
+ * 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const AttributeMap = require('../../static/js/AttributeMap');
+const Changeset = require('../../static/js/Changeset');
+const { checkValidRev } = require('./checkValidRev');
+
+/*
+ * This method seems unused in core and no plugins depend on it
+ */
+exports.getPadPlainText = (pad: { getInternalRevisionAText: (arg0: any) => any; atext: any; pool: any; }, revNum: undefined) => {
+  const _analyzeLine = exports._analyzeLine;
+  const atext = ((revNum !== undefined) ? pad.getInternalRevisionAText(checkValidRev(revNum)) : pad.atext);
+  const textLines = atext.text.slice(0, -1).split('\n');
+  const attribLines = Changeset.splitAttributionLines(atext.attribs, atext.text);
+  const apool = pad.pool;
+
+  const pieces = [];
+  for (let i = 0; i < textLines.length; i++) {
+    const line = _analyzeLine(textLines[i], attribLines[i], apool);
+    if (line.listLevel) {
+      const numSpaces = line.listLevel * 2 - 1;
+      const bullet = '*';
+      pieces.push(new Array(numSpaces + 1).join(' '), bullet, ' ', line.text, '\n');
+    } else {
+      pieces.push(line.text, '\n');
+    }
+  }
+
+  return pieces.join('');
+};
+type LineModel = {
+  [id:string]:string|number|LineModel
+}
+
+exports._analyzeLine = (text:string, aline: LineModel, apool: Function) => {
+  const line: LineModel = {};
+
+  // identify list
+  let lineMarker = 0;
+  line.listLevel = 0;
+  if (aline) {
+    const [op] = Changeset.deserializeOps(aline);
+    if (op != null) {
+      const attribs = AttributeMap.fromString(op.attribs, apool);
+      let listType = attribs.get('list');
+      if (listType) {
+        lineMarker = 1;
+        listType = /([a-z]+)([0-9]+)/.exec(listType);
+        if (listType) {
+          line.listTypeName = listType[1];
+          line.listLevel = Number(listType[2]);
+        }
+      }
+      const start = attribs.get('start');
+      if (start) {
+        line.start = start;
+      }
+    }
+  }
+  if (lineMarker) {
+    line.text = text.substring(1);
+    line.aline = Changeset.subattribution(aline, 1);
+  } else {
+    line.text = text;
+    line.aline = aline;
+  }
+  return line;
+};
+
+
+exports._encodeWhitespace =
+  (s:string) => s.replace(/[^\x21-\x7E\s\t\n\r]/gu, (c) => `&#${c.codePointAt(0)};`);