Updated 18 files, added 1692 files and deleted includes/system/compare.inc (automated)

1 files changed, 742 insertions, 0 deletions

diff --git a/includes/external/matrix/node_modules/matrix-js-sdk/lib/utils.js b/includes/external/matrix/node_modules/matrix-js-sdk/lib/utils.js
new file mode 100644
index 0000000..1022ee4
--- /dev/null
+++ b/includes/external/matrix/node_modules/matrix-js-sdk/lib/utils.js
@@ -0,0 +1,742 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.MapWithDefault = exports.DEFAULT_ALPHABET = void 0;
+exports.alphabetPad = alphabetPad;
+exports.averageBetweenStrings = averageBetweenStrings;
+exports.baseToString = baseToString;
+exports.checkObjectHasKeys = checkObjectHasKeys;
+exports.chunkPromises = chunkPromises;
+exports.compare = compare;
+exports.decodeParams = decodeParams;
+exports.deepCompare = deepCompare;
+exports.deepCopy = deepCopy;
+exports.deepSortedObjectEntries = deepSortedObjectEntries;
+exports.defer = defer;
+exports.encodeParams = encodeParams;
+exports.encodeUri = encodeUri;
+exports.ensureNoTrailingSlash = ensureNoTrailingSlash;
+exports.escapeRegExp = escapeRegExp;
+exports.globToRegexp = globToRegexp;
+exports.immediate = immediate;
+exports.internaliseString = internaliseString;
+exports.isFunction = isFunction;
+exports.isNullOrUndefined = isNullOrUndefined;
+exports.isNumber = isNumber;
+exports.isSupportedReceiptType = isSupportedReceiptType;
+exports.lexicographicCompare = lexicographicCompare;
+exports.mapsEqual = mapsEqual;
+exports.nextString = nextString;
+exports.noUnsafeEventProps = noUnsafeEventProps;
+exports.normalize = normalize;
+exports.prevString = prevString;
+exports.promiseMapSeries = promiseMapSeries;
+exports.promiseTry = promiseTry;
+exports.recursiveMapToObject = recursiveMapToObject;
+exports.recursivelyAssign = recursivelyAssign;
+exports.removeDirectionOverrideChars = removeDirectionOverrideChars;
+exports.removeElement = removeElement;
+exports.removeHiddenChars = removeHiddenChars;
+exports.replaceParam = replaceParam;
+exports.safeSet = safeSet;
+exports.simpleRetryOperation = simpleRetryOperation;
+exports.sleep = sleep;
+exports.sortEventsByLatestContentTimestamp = sortEventsByLatestContentTimestamp;
+exports.stringToBase = stringToBase;
+exports.unsafeProp = unsafeProp;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _unhomoglyph = _interopRequireDefault(require("unhomoglyph"));
+var _pRetry = _interopRequireDefault(require("p-retry"));
+var _location = require("./@types/location");
+var _read_receipts = require("./@types/read_receipts");
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { (0, _defineProperty2.default)(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+const interns = new Map();
+
+/**
+ * Internalises a string, reusing a known pointer or storing the pointer
+ * if needed for future strings.
+ * @param str - The string to internalise.
+ * @returns The internalised string.
+ */
+function internaliseString(str) {
+  // Unwrap strings before entering the map, if we somehow got a wrapped
+  // string as our input. This should only happen from tests.
+  if (str instanceof String) {
+    str = str.toString();
+  }
+
+  // Check the map to see if we can store the value
+  if (!interns.has(str)) {
+    interns.set(str, str);
+  }
+
+  // Return any cached string reference
+  return interns.get(str);
+}
+
+/**
+ * Encode a dictionary of query parameters.
+ * Omits any undefined/null values.
+ * @param params - A dict of key/values to encode e.g.
+ * `{"foo": "bar", "baz": "taz"}`
+ * @returns The encoded string e.g. foo=bar&baz=taz
+ */
+function encodeParams(params, urlSearchParams) {
+  const searchParams = urlSearchParams !== null && urlSearchParams !== void 0 ? urlSearchParams : new URLSearchParams();
+  for (const [key, val] of Object.entries(params)) {
+    if (val !== undefined && val !== null) {
+      if (Array.isArray(val)) {
+        val.forEach(v => {
+          searchParams.append(key, String(v));
+        });
+      } else {
+        searchParams.append(key, String(val));
+      }
+    }
+  }
+  return searchParams;
+}
+/**
+ * Replace a stable parameter with the unstable naming for params
+ */
+function replaceParam(stable, unstable, dict) {
+  const result = _objectSpread(_objectSpread({}, dict), {}, {
+    [unstable]: dict[stable]
+  });
+  delete result[stable];
+  return result;
+}
+
+/**
+ * Decode a query string in `application/x-www-form-urlencoded` format.
+ * @param query - A query string to decode e.g.
+ * foo=bar&via=server1&server2
+ * @returns The decoded object, if any keys occurred multiple times
+ * then the value will be an array of strings, else it will be an array.
+ * This behaviour matches Node's qs.parse but is built on URLSearchParams
+ * for native web compatibility
+ */
+function decodeParams(query) {
+  const o = {};
+  const params = new URLSearchParams(query);
+  for (const key of params.keys()) {
+    const val = params.getAll(key);
+    o[key] = val.length === 1 ? val[0] : val;
+  }
+  return o;
+}
+
+/**
+ * Encodes a URI according to a set of template variables. Variables will be
+ * passed through encodeURIComponent.
+ * @param pathTemplate - The path with template variables e.g. '/foo/$bar'.
+ * @param variables - The key/value pairs to replace the template
+ * variables with. E.g. `{ "$bar": "baz" }`.
+ * @returns The result of replacing all template variables e.g. '/foo/baz'.
+ */
+function encodeUri(pathTemplate, variables) {
+  for (const key in variables) {
+    if (!variables.hasOwnProperty(key)) {
+      continue;
+    }
+    const value = variables[key];
+    if (value === undefined || value === null) {
+      continue;
+    }
+    pathTemplate = pathTemplate.replace(key, encodeURIComponent(value));
+  }
+  return pathTemplate;
+}
+
+/**
+ * The removeElement() method removes the first element in the array that
+ * satisfies (returns true) the provided testing function.
+ * @param array - The array.
+ * @param fn - Function to execute on each value in the array, with the
+ * function signature `fn(element, index, array)`. Return true to
+ * remove this element and break.
+ * @param reverse - True to search in reverse order.
+ * @returns True if an element was removed.
+ */
+function removeElement(array, fn, reverse) {
+  let i;
+  if (reverse) {
+    for (i = array.length - 1; i >= 0; i--) {
+      if (fn(array[i], i, array)) {
+        array.splice(i, 1);
+        return true;
+      }
+    }
+  } else {
+    for (i = 0; i < array.length; i++) {
+      if (fn(array[i], i, array)) {
+        array.splice(i, 1);
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+/**
+ * Checks if the given thing is a function.
+ * @param value - The thing to check.
+ * @returns True if it is a function.
+ */
+function isFunction(value) {
+  return Object.prototype.toString.call(value) === "[object Function]";
+}
+
+/**
+ * Checks that the given object has the specified keys.
+ * @param obj - The object to check.
+ * @param keys - The list of keys that 'obj' must have.
+ * @throws If the object is missing keys.
+ */
+// note using 'keys' here would shadow the 'keys' function defined above
+function checkObjectHasKeys(obj, keys) {
+  for (const key of keys) {
+    if (!obj.hasOwnProperty(key)) {
+      throw new Error("Missing required key: " + key);
+    }
+  }
+}
+
+/**
+ * Deep copy the given object. The object MUST NOT have circular references and
+ * MUST NOT have functions.
+ * @param obj - The object to deep copy.
+ * @returns A copy of the object without any references to the original.
+ */
+function deepCopy(obj) {
+  return JSON.parse(JSON.stringify(obj));
+}
+
+/**
+ * Compare two objects for equality. The objects MUST NOT have circular references.
+ *
+ * @param x - The first object to compare.
+ * @param y - The second object to compare.
+ *
+ * @returns true if the two objects are equal
+ */
+function deepCompare(x, y) {
+  // Inspired by
+  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript#1144249
+
+  // Compare primitives and functions.
+  // Also check if both arguments link to the same object.
+  if (x === y) {
+    return true;
+  }
+  if (typeof x !== typeof y) {
+    return false;
+  }
+
+  // special-case NaN (since NaN !== NaN)
+  if (typeof x === "number" && isNaN(x) && isNaN(y)) {
+    return true;
+  }
+
+  // special-case null (since typeof null == 'object', but null.constructor
+  // throws)
+  if (x === null || y === null) {
+    return x === y;
+  }
+
+  // everything else is either an unequal primitive, or an object
+  if (!(x instanceof Object)) {
+    return false;
+  }
+
+  // check they are the same type of object
+  if (x.constructor !== y.constructor || x.prototype !== y.prototype) {
+    return false;
+  }
+
+  // special-casing for some special types of object
+  if (x instanceof RegExp || x instanceof Date) {
+    return x.toString() === y.toString();
+  }
+
+  // the object algorithm works for Array, but it's sub-optimal.
+  if (Array.isArray(x)) {
+    if (x.length !== y.length) {
+      return false;
+    }
+    for (let i = 0; i < x.length; i++) {
+      if (!deepCompare(x[i], y[i])) {
+        return false;
+      }
+    }
+  } else {
+    // check that all of y's direct keys are in x
+    for (const p in y) {
+      if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
+        return false;
+      }
+    }
+
+    // finally, compare each of x's keys with y
+    for (const p in x) {
+      if (y.hasOwnProperty(p) !== x.hasOwnProperty(p) || !deepCompare(x[p], y[p])) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+// Dev note: This returns an array of tuples, but jsdoc doesn't like that. https://github.com/jsdoc/jsdoc/issues/1703
+/**
+ * Creates an array of object properties/values (entries) then
+ * sorts the result by key, recursively. The input object must
+ * ensure it does not have loops. If the input is not an object
+ * then it will be returned as-is.
+ * @param obj - The object to get entries of
+ * @returns The entries, sorted by key.
+ */
+function deepSortedObjectEntries(obj) {
+  if (typeof obj !== "object") return obj;
+
+  // Apparently these are object types...
+  if (obj === null || obj === undefined || Array.isArray(obj)) return obj;
+  const pairs = [];
+  for (const [k, v] of Object.entries(obj)) {
+    pairs.push([k, deepSortedObjectEntries(v)]);
+  }
+
+  // lexicographicCompare is faster than localeCompare, so let's use that.
+  pairs.sort((a, b) => lexicographicCompare(a[0], b[0]));
+  return pairs;
+}
+
+/**
+ * Returns whether the given value is a finite number without type-coercion
+ *
+ * @param value - the value to test
+ * @returns whether or not value is a finite number without type-coercion
+ */
+function isNumber(value) {
+  return typeof value === "number" && isFinite(value);
+}
+
+/**
+ * Removes zero width chars, diacritics and whitespace from the string
+ * Also applies an unhomoglyph on the string, to prevent similar looking chars
+ * @param str - the string to remove hidden characters from
+ * @returns a string with the hidden characters removed
+ */
+function removeHiddenChars(str) {
+  if (typeof str === "string") {
+    return (0, _unhomoglyph.default)(str.normalize("NFD").replace(removeHiddenCharsRegex, ""));
+  }
+  return "";
+}
+
+/**
+ * Removes the direction override characters from a string
+ * @returns string with chars removed
+ */
+function removeDirectionOverrideChars(str) {
+  if (typeof str === "string") {
+    return str.replace(/[\u202d-\u202e]/g, "");
+  }
+  return "";
+}
+function normalize(str) {
+  // Note: we have to match the filter with the removeHiddenChars() because the
+  // function strips spaces and other characters (M becomes RN for example, in lowercase).
+  return removeHiddenChars(str.toLowerCase())
+  // Strip all punctuation
+  .replace(/[\\'!"#$%&()*+,\-./:;<=>?@[\]^_`{|}~\u2000-\u206f\u2e00-\u2e7f]/g, "")
+  // We also doubly convert to lowercase to work around oddities of the library.
+  .toLowerCase();
+}
+
+// Regex matching bunch of unicode control characters and otherwise misleading/invisible characters.
+// Includes:
+// various width spaces U+2000 - U+200D
+// LTR and RTL marks U+200E and U+200F
+// LTR/RTL and other directional formatting marks U+202A - U+202F
+// Arabic Letter RTL mark U+061C
+// Combining characters U+0300 - U+036F
+// Zero width no-break space (BOM) U+FEFF
+// Blank/invisible characters (U2800, U2062-U2063)
+// eslint-disable-next-line no-misleading-character-class
+const removeHiddenCharsRegex = /[\u2000-\u200F\u202A-\u202F\u0300-\u036F\uFEFF\u061C\u2800\u2062-\u2063\s]/g;
+function escapeRegExp(string) {
+  return string.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+}
+function globToRegexp(glob, extended = false) {
+  // From
+  // https://github.com/matrix-org/synapse/blob/abbee6b29be80a77e05730707602f3bbfc3f38cb/synapse/push/__init__.py#L132
+  // Because micromatch is about 130KB with dependencies,
+  // and minimatch is not much better.
+  const replacements = [[/\\\*/g, ".*"], [/\?/g, "."]];
+  if (!extended) {
+    replacements.push([/\\\[(!|)(.*)\\]/g, (_match, neg, pat) => ["[", neg ? "^" : "", pat.replace(/\\-/, "-"), "]"].join("")]);
+  }
+  return replacements.reduce(
+  // https://github.com/microsoft/TypeScript/issues/30134
+  (pat, args) => args ? pat.replace(args[0], args[1]) : pat, escapeRegExp(glob));
+}
+function ensureNoTrailingSlash(url) {
+  if (url !== null && url !== void 0 && url.endsWith("/")) {
+    return url.slice(0, -1);
+  } else {
+    return url;
+  }
+}
+
+/**
+ * Returns a promise which resolves with a given value after the given number of ms
+ */
+function sleep(ms, value) {
+  return new Promise(resolve => {
+    setTimeout(resolve, ms, value);
+  });
+}
+
+/**
+ * Promise/async version of {@link setImmediate}.
+ */
+function immediate() {
+  return new Promise(setImmediate);
+}
+function isNullOrUndefined(val) {
+  return val === null || val === undefined;
+}
+// Returns a Deferred
+function defer() {
+  let resolve;
+  let reject;
+  const promise = new Promise((_resolve, _reject) => {
+    resolve = _resolve;
+    reject = _reject;
+  });
+  return {
+    resolve,
+    reject,
+    promise
+  };
+}
+async function promiseMapSeries(promises, fn // if async we don't care about the type as we only await resolution
+) {
+  for (const o of promises) {
+    await fn(await o);
+  }
+}
+function promiseTry(fn) {
+  return Promise.resolve(fn());
+}
+
+// Creates and awaits all promises, running no more than `chunkSize` at the same time
+async function chunkPromises(fns, chunkSize) {
+  const results = [];
+  for (let i = 0; i < fns.length; i += chunkSize) {
+    results.push(...(await Promise.all(fns.slice(i, i + chunkSize).map(fn => fn()))));
+  }
+  return results;
+}
+
+/**
+ * Retries the function until it succeeds or is interrupted. The given function must return
+ * a promise which throws/rejects on error, otherwise the retry will assume the request
+ * succeeded. The promise chain returned will contain the successful promise. The given function
+ * should always return a new promise.
+ * @param promiseFn - The function to call to get a fresh promise instance. Takes an
+ * attempt count as an argument, for logging/debugging purposes.
+ * @returns The promise for the retried operation.
+ */
+function simpleRetryOperation(promiseFn) {
+  return (0, _pRetry.default)(attempt => {
+    return promiseFn(attempt);
+  }, {
+    forever: true,
+    factor: 2,
+    minTimeout: 3000,
+    // ms
+    maxTimeout: 15000 // ms
+  });
+}
+
+// String averaging inspired by https://stackoverflow.com/a/2510816
+// Dev note: We make the alphabet a string because it's easier to write syntactically
+// than arrays. Thankfully, strings implement the useful parts of the Array interface
+// anyhow.
+
+/**
+ * The default alphabet used by string averaging in this SDK. This matches
+ * all usefully printable ASCII characters (0x20-0x7E, inclusive).
+ */
+const DEFAULT_ALPHABET = (() => {
+  let str = "";
+  for (let c = 0x20; c <= 0x7e; c++) {
+    str += String.fromCharCode(c);
+  }
+  return str;
+})();
+
+/**
+ * Pads a string using the given alphabet as a base. The returned string will be
+ * padded at the end with the first character in the alphabet.
+ *
+ * This is intended for use with string averaging.
+ * @param s - The string to pad.
+ * @param n - The length to pad to.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The padded string.
+ */
+exports.DEFAULT_ALPHABET = DEFAULT_ALPHABET;
+function alphabetPad(s, n, alphabet = DEFAULT_ALPHABET) {
+  return s.padEnd(n, alphabet[0]);
+}
+
+/**
+ * Converts a baseN number to a string, where N is the alphabet's length.
+ *
+ * This is intended for use with string averaging.
+ * @param n - The baseN number.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The baseN number encoded as a string from the alphabet.
+ */
+function baseToString(n, alphabet = DEFAULT_ALPHABET) {
+  // Developer note: the stringToBase() function offsets the character set by 1 so that repeated
+  // characters (ie: "aaaaaa" in a..z) don't come out as zero. We have to reverse this here as
+  // otherwise we'll be wrong in our conversion. Undoing a +1 before an exponent isn't very fun
+  // though, so we rely on a lengthy amount of `x - 1` and integer division rules to reach a
+  // sane state. This also means we have to do rollover detection: see below.
+
+  const len = BigInt(alphabet.length);
+  if (n <= len) {
+    var _alphabet;
+    return (_alphabet = alphabet[Number(n) - 1]) !== null && _alphabet !== void 0 ? _alphabet : "";
+  }
+  let d = n / len;
+  let r = Number(n % len) - 1;
+
+  // Rollover detection: if the remainder is negative, it means that the string needs
+  // to roll over by 1 character downwards (ie: in a..z, the previous to "aaa" would be
+  // "zz").
+  if (r < 0) {
+    d -= BigInt(Math.abs(r)); // abs() is just to be clear what we're doing. Could also `+= r`.
+    r = Number(len) - 1;
+  }
+  return baseToString(d, alphabet) + alphabet[r];
+}
+
+/**
+ * Converts a string to a baseN number, where N is the alphabet's length.
+ *
+ * This is intended for use with string averaging.
+ * @param s - The string to convert to a number.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The baseN number.
+ */
+function stringToBase(s, alphabet = DEFAULT_ALPHABET) {
+  const len = BigInt(alphabet.length);
+
+  // In our conversion to baseN we do a couple performance optimizations to avoid using
+  // excess CPU and such. To create baseN numbers, the input string needs to be reversed
+  // so the exponents stack up appropriately, as the last character in the unreversed
+  // string has less impact than the first character (in "abc" the A is a lot more important
+  // for lexicographic sorts). We also do a trick with the character codes to optimize the
+  // alphabet lookup, avoiding an index scan of `alphabet.indexOf(reversedStr[i])` - we know
+  // that the alphabet and (theoretically) the input string are constrained on character sets
+  // and thus can do simple subtraction to end up with the same result.
+
+  // Developer caution: we carefully cast to BigInt here to avoid losing precision. We cannot
+  // rely on Math.pow() (for example) to be capable of handling our insane numbers.
+
+  let result = BigInt(0);
+  for (let i = s.length - 1, j = BigInt(0); i >= 0; i--, j++) {
+    const charIndex = s.charCodeAt(i) - alphabet.charCodeAt(0);
+
+    // We add 1 to the char index to offset the whole numbering scheme. We unpack this in
+    // the baseToString() function.
+    result += BigInt(1 + charIndex) * len ** j;
+  }
+  return result;
+}
+
+/**
+ * Averages two strings, returning the midpoint between them. This is accomplished by
+ * converting both to baseN numbers (where N is the alphabet's length) then averaging
+ * those before re-encoding as a string.
+ * @param a - The first string.
+ * @param b - The second string.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The midpoint between the strings, as a string.
+ */
+function averageBetweenStrings(a, b, alphabet = DEFAULT_ALPHABET) {
+  const padN = Math.max(a.length, b.length);
+  const baseA = stringToBase(alphabetPad(a, padN, alphabet), alphabet);
+  const baseB = stringToBase(alphabetPad(b, padN, alphabet), alphabet);
+  const avg = (baseA + baseB) / BigInt(2);
+
+  // Detect integer division conflicts. This happens when two numbers are divided too close so
+  // we lose a .5 precision. We need to add a padding character in these cases.
+  if (avg === baseA || avg == baseB) {
+    return baseToString(avg, alphabet) + alphabet[0];
+  }
+  return baseToString(avg, alphabet);
+}
+
+/**
+ * Finds the next string using the alphabet provided. This is done by converting the
+ * string to a baseN number, where N is the alphabet's length, then adding 1 before
+ * converting back to a string.
+ * @param s - The string to start at.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The string which follows the input string.
+ */
+function nextString(s, alphabet = DEFAULT_ALPHABET) {
+  return baseToString(stringToBase(s, alphabet) + BigInt(1), alphabet);
+}
+
+/**
+ * Finds the previous string using the alphabet provided. This is done by converting the
+ * string to a baseN number, where N is the alphabet's length, then subtracting 1 before
+ * converting back to a string.
+ * @param s - The string to start at.
+ * @param alphabet - The alphabet to use as a single string.
+ * @returns The string which precedes the input string.
+ */
+function prevString(s, alphabet = DEFAULT_ALPHABET) {
+  return baseToString(stringToBase(s, alphabet) - BigInt(1), alphabet);
+}
+
+/**
+ * Compares strings lexicographically as a sort-safe function.
+ * @param a - The first (reference) string.
+ * @param b - The second (compare) string.
+ * @returns Negative if the reference string is before the compare string;
+ * positive if the reference string is after; and zero if equal.
+ */
+function lexicographicCompare(a, b) {
+  // Dev note: this exists because I'm sad that you can use math operators on strings, so I've
+  // hidden the operation in this function.
+  if (a < b) {
+    return -1;
+  } else if (a > b) {
+    return 1;
+  } else {
+    return 0;
+  }
+}
+const collator = new Intl.Collator();
+/**
+ * Performant language-sensitive string comparison
+ * @param a - the first string to compare
+ * @param b - the second string to compare
+ */
+function compare(a, b) {
+  return collator.compare(a, b);
+}
+
+/**
+ * This function is similar to Object.assign() but it assigns recursively and
+ * allows you to ignore nullish values from the source
+ *
+ * @returns the target object
+ */
+function recursivelyAssign(target, source, ignoreNullish = false) {
+  for (const [sourceKey, sourceValue] of Object.entries(source)) {
+    if (target[sourceKey] instanceof Object && sourceValue) {
+      recursivelyAssign(target[sourceKey], sourceValue);
+      continue;
+    }
+    if (sourceValue !== null && sourceValue !== undefined || !ignoreNullish) {
+      target[sourceKey] = sourceValue;
+      continue;
+    }
+  }
+  return target;
+}
+function getContentTimestampWithFallback(event) {
+  var _M_TIMESTAMP$findIn;
+  return (_M_TIMESTAMP$findIn = _location.M_TIMESTAMP.findIn(event.getContent())) !== null && _M_TIMESTAMP$findIn !== void 0 ? _M_TIMESTAMP$findIn : -1;
+}
+
+/**
+ * Sort events by their content m.ts property
+ * Latest timestamp first
+ */
+function sortEventsByLatestContentTimestamp(left, right) {
+  return getContentTimestampWithFallback(right) - getContentTimestampWithFallback(left);
+}
+function isSupportedReceiptType(receiptType) {
+  return [_read_receipts.ReceiptType.Read, _read_receipts.ReceiptType.ReadPrivate].includes(receiptType);
+}
+
+/**
+ * Determines whether two maps are equal.
+ * @param eq - The equivalence relation to compare values by. Defaults to strict equality.
+ */
+function mapsEqual(x, y, eq = (v1, v2) => v1 === v2) {
+  if (x.size !== y.size) return false;
+  for (const [k, v1] of x) {
+    const v2 = y.get(k);
+    if (v2 === undefined || !eq(v1, v2)) return false;
+  }
+  return true;
+}
+function processMapToObjectValue(value) {
+  if (value instanceof Map) {
+    // Value is a Map. Recursively map it to an object.
+    return recursiveMapToObject(value);
+  } else if (Array.isArray(value)) {
+    // Value is an Array. Recursively map the value (e.g. to cover Array of Arrays).
+    return value.map(v => processMapToObjectValue(v));
+  } else {
+    return value;
+  }
+}
+
+/**
+ * Recursively converts Maps to plain objects.
+ * Also supports sub-lists of Maps.
+ */
+function recursiveMapToObject(map) {
+  const targetMap = new Map();
+  for (const [key, value] of map) {
+    targetMap.set(key, processMapToObjectValue(value));
+  }
+  return Object.fromEntries(targetMap.entries());
+}
+function unsafeProp(prop) {
+  return prop === "__proto__" || prop === "prototype" || prop === "constructor";
+}
+function safeSet(obj, prop, value) {
+  if (unsafeProp(prop)) {
+    throw new Error("Trying to modify prototype or constructor");
+  }
+  obj[prop] = value;
+}
+function noUnsafeEventProps(event) {
+  return !(unsafeProp(event.room_id) || unsafeProp(event.sender) || unsafeProp(event.user_id) || unsafeProp(event.event_id));
+}
+class MapWithDefault extends Map {
+  constructor(createDefault) {
+    super();
+    this.createDefault = createDefault;
+  }
+
+  /**
+   * Returns the value if the key already exists.
+   * If not, it creates a new value under that key using the ctor callback and returns it.
+   */
+  getOrCreate(key) {
+    if (!this.has(key)) {
+      this.set(key, this.createDefault());
+    }
+    return this.get(key);
+  }
+}
+exports.MapWithDefault = MapWithDefault;
+//# sourceMappingURL=utils.js.map
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