diff options
Diffstat (limited to 'frontend-old/node_modules/idb/build/wrap-idb-value.cjs')
| -rw-r--r-- | frontend-old/node_modules/idb/build/wrap-idb-value.cjs | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/frontend-old/node_modules/idb/build/wrap-idb-value.cjs b/frontend-old/node_modules/idb/build/wrap-idb-value.cjs deleted file mode 100644 index b70cde5..0000000 --- a/frontend-old/node_modules/idb/build/wrap-idb-value.cjs +++ /dev/null @@ -1,191 +0,0 @@ -'use strict'; - -const instanceOfAny = (object, constructors) => constructors.some((c) => object instanceof c); - -let idbProxyableTypes; -let cursorAdvanceMethods; -// This is a function to prevent it throwing up in node environments. -function getIdbProxyableTypes() { - return (idbProxyableTypes || - (idbProxyableTypes = [ - IDBDatabase, - IDBObjectStore, - IDBIndex, - IDBCursor, - IDBTransaction, - ])); -} -// This is a function to prevent it throwing up in node environments. -function getCursorAdvanceMethods() { - return (cursorAdvanceMethods || - (cursorAdvanceMethods = [ - IDBCursor.prototype.advance, - IDBCursor.prototype.continue, - IDBCursor.prototype.continuePrimaryKey, - ])); -} -const cursorRequestMap = new WeakMap(); -const transactionDoneMap = new WeakMap(); -const transactionStoreNamesMap = new WeakMap(); -const transformCache = new WeakMap(); -const reverseTransformCache = new WeakMap(); -function promisifyRequest(request) { - const promise = new Promise((resolve, reject) => { - const unlisten = () => { - request.removeEventListener('success', success); - request.removeEventListener('error', error); - }; - const success = () => { - resolve(wrap(request.result)); - unlisten(); - }; - const error = () => { - reject(request.error); - unlisten(); - }; - request.addEventListener('success', success); - request.addEventListener('error', error); - }); - promise - .then((value) => { - // Since cursoring reuses the IDBRequest (*sigh*), we cache it for later retrieval - // (see wrapFunction). - if (value instanceof IDBCursor) { - cursorRequestMap.set(value, request); - } - // Catching to avoid "Uncaught Promise exceptions" - }) - .catch(() => { }); - // This mapping exists in reverseTransformCache but doesn't doesn't exist in transformCache. This - // is because we create many promises from a single IDBRequest. - reverseTransformCache.set(promise, request); - return promise; -} -function cacheDonePromiseForTransaction(tx) { - // Early bail if we've already created a done promise for this transaction. - if (transactionDoneMap.has(tx)) - return; - const done = new Promise((resolve, reject) => { - const unlisten = () => { - tx.removeEventListener('complete', complete); - tx.removeEventListener('error', error); - tx.removeEventListener('abort', error); - }; - const complete = () => { - resolve(); - unlisten(); - }; - const error = () => { - reject(tx.error || new DOMException('AbortError', 'AbortError')); - unlisten(); - }; - tx.addEventListener('complete', complete); - tx.addEventListener('error', error); - tx.addEventListener('abort', error); - }); - // Cache it for later retrieval. - transactionDoneMap.set(tx, done); -} -let idbProxyTraps = { - get(target, prop, receiver) { - if (target instanceof IDBTransaction) { - // Special handling for transaction.done. - if (prop === 'done') - return transactionDoneMap.get(target); - // Polyfill for objectStoreNames because of Edge. - if (prop === 'objectStoreNames') { - return target.objectStoreNames || transactionStoreNamesMap.get(target); - } - // Make tx.store return the only store in the transaction, or undefined if there are many. - if (prop === 'store') { - return receiver.objectStoreNames[1] - ? undefined - : receiver.objectStore(receiver.objectStoreNames[0]); - } - } - // Else transform whatever we get back. - return wrap(target[prop]); - }, - set(target, prop, value) { - target[prop] = value; - return true; - }, - has(target, prop) { - if (target instanceof IDBTransaction && - (prop === 'done' || prop === 'store')) { - return true; - } - return prop in target; - }, -}; -function replaceTraps(callback) { - idbProxyTraps = callback(idbProxyTraps); -} -function wrapFunction(func) { - // Due to expected object equality (which is enforced by the caching in `wrap`), we - // only create one new func per func. - // Edge doesn't support objectStoreNames (booo), so we polyfill it here. - if (func === IDBDatabase.prototype.transaction && - !('objectStoreNames' in IDBTransaction.prototype)) { - return function (storeNames, ...args) { - const tx = func.call(unwrap(this), storeNames, ...args); - transactionStoreNamesMap.set(tx, storeNames.sort ? storeNames.sort() : [storeNames]); - return wrap(tx); - }; - } - // Cursor methods are special, as the behaviour is a little more different to standard IDB. In - // IDB, you advance the cursor and wait for a new 'success' on the IDBRequest that gave you the - // cursor. It's kinda like a promise that can resolve with many values. That doesn't make sense - // with real promises, so each advance methods returns a new promise for the cursor object, or - // undefined if the end of the cursor has been reached. - if (getCursorAdvanceMethods().includes(func)) { - return function (...args) { - // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use - // the original object. - func.apply(unwrap(this), args); - return wrap(cursorRequestMap.get(this)); - }; - } - return function (...args) { - // Calling the original function with the proxy as 'this' causes ILLEGAL INVOCATION, so we use - // the original object. - return wrap(func.apply(unwrap(this), args)); - }; -} -function transformCachableValue(value) { - if (typeof value === 'function') - return wrapFunction(value); - // This doesn't return, it just creates a 'done' promise for the transaction, - // which is later returned for transaction.done (see idbObjectHandler). - if (value instanceof IDBTransaction) - cacheDonePromiseForTransaction(value); - if (instanceOfAny(value, getIdbProxyableTypes())) - return new Proxy(value, idbProxyTraps); - // Return the same value back if we're not going to transform it. - return value; -} -function wrap(value) { - // We sometimes generate multiple promises from a single IDBRequest (eg when cursoring), because - // IDB is weird and a single IDBRequest can yield many responses, so these can't be cached. - if (value instanceof IDBRequest) - return promisifyRequest(value); - // If we've already transformed this value before, reuse the transformed value. - // This is faster, but it also provides object equality. - if (transformCache.has(value)) - return transformCache.get(value); - const newValue = transformCachableValue(value); - // Not all types are transformed. - // These may be primitive types, so they can't be WeakMap keys. - if (newValue !== value) { - transformCache.set(value, newValue); - reverseTransformCache.set(newValue, value); - } - return newValue; -} -const unwrap = (value) => reverseTransformCache.get(value); - -exports.instanceOfAny = instanceOfAny; -exports.replaceTraps = replaceTraps; -exports.reverseTransformCache = reverseTransformCache; -exports.unwrap = unwrap; -exports.wrap = wrap; |
