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https://github.com/Eaglercraft-Archive/Eaglercraftx-1.8.8-src.git
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Update #44 - WebAssembly GC support, fix more WebRTC bugs
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lax1dude
295
sources/wasm-gc-teavm/js/platformFilesystem.js
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295
sources/wasm-gc-teavm/js/platformFilesystem.js
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/*
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* Copyright (c) 2024 lax1dude. All Rights Reserved.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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const platfFilesystemName = "platformFilesystem";
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/**
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* @param {Object} k
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* @return {string}
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*/
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function readDBKey(k) {
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return ((typeof k) === "string") ? k : (((typeof k) === "undefined") ? null : (((typeof k[0]) === "string") ? k[0] : null));
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}
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/**
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* @param {Object} obj
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* @return {ArrayBuffer}
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*/
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function readDBRow(obj) {
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return (typeof obj === "undefined") ? null : ((typeof obj["data"] === "undefined") ? null : obj["data"]);
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}
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/**
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* @param {string} pat
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* @param {ArrayBuffer} dat
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* @return {Object}
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*/
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function writeDBRow(pat, dat) {
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return { "path": pat, "data": dat };
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}
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/**
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* @param {string} filesystemDB
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* @return {Promise}
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*/
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function openDBImpl(filesystemDB) {
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return new Promise(function(resolve) {
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if(typeof indexedDB === "undefined") {
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resolve({
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"failedInit": true,
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"failedLocked": false,
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"failedError": "IndexedDB not supported",
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"database": null
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});
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return;
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}
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let dbOpen;
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try {
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dbOpen = indexedDB.open(filesystemDB, 1);
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}catch(err) {
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resolve({
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"failedInit": true,
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"failedLocked": false,
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"failedError": "Exception opening database",
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"database": null
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});
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return;
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}
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let resultConsumer = resolve;
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dbOpen.addEventListener("success", function(evt) {
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if(resultConsumer) resultConsumer({
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"failedInit": false,
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"failedLocked": false,
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"failedError": null,
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"database": dbOpen.result
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});
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resultConsumer = null;
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});
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dbOpen.addEventListener("blocked", function(evt) {
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if(resultConsumer) resultConsumer({
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"failedInit": false,
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"failedLocked": true,
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"failedError": "Database is locked",
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"database": null
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});
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resultConsumer = null;
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});
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dbOpen.addEventListener("error", function(evt) {
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if(resultConsumer) resultConsumer({
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"failedInit": true,
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"failedLocked": false,
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"failedError": "Opening database failed",
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"database": null
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});
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resultConsumer = null;
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});
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dbOpen.addEventListener("upgradeneeded", function(evt) {
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dbOpen.result.createObjectStore("filesystem", { keyPath: ["path"] });
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});
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});
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}
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eagruntimeImpl.platformFilesystem["openDB"] = new WebAssembly.Suspending(openDBImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @return {Promise}
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*/
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function eaglerDeleteImpl(database, pathName) {
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return new Promise(function(resolve) {
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const tx = database.transaction("filesystem", "readwrite");
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const r = tx.objectStore("filesystem").delete([pathName]);
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r.addEventListener("success", function() {
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resolve(true);
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});
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r.addEventListener("error", function() {
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resolve(false);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerDelete"] = new WebAssembly.Suspending(eaglerDeleteImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @return {Promise}
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*/
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function eaglerReadImpl(database, pathName) {
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return new Promise(function(resolve) {
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const tx = database.transaction("filesystem", "readonly");
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const r = tx.objectStore("filesystem").get([pathName]);
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r.addEventListener("success", function() {
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resolve(readDBRow(r.result));
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});
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r.addEventListener("error", function() {
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resolve(null);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerRead"] = new WebAssembly.Suspending(eaglerReadImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @param {ArrayBuffer} arr
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* @return {Promise}
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*/
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function eaglerWriteImpl(database, pathName, arr) {
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return new Promise(function(resolve) {
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const tx = database.transaction("filesystem", "readwrite");
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const r = tx.objectStore("filesystem").put(writeDBRow(pathName, arr));
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r.addEventListener("success", function() {
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resolve(true);
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});
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r.addEventListener("error", function() {
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resolve(false);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerWrite"] = new WebAssembly.Suspending(eaglerWriteImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @return {Promise}
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*/
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function eaglerExistsImpl(database, pathName) {
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return new Promise(function(resolve) {
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const tx = database.transaction("filesystem", "readonly");
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const r = tx.objectStore("filesystem").count([pathName]);
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r.addEventListener("success", function() {
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resolve(r.result > 0);
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});
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r.addEventListener("error", function() {
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resolve(false);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerExists"] = new WebAssembly.Suspending(eaglerExistsImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathNameOld
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* @param {string} pathNameNew
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* @return {Promise<boolean>}
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*/
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async function eaglerMoveImpl(database, pathNameOld, pathNameNew) {
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const oldData = await eaglerReadImpl(database, pathNameOld);
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if(!oldData || !(await eaglerWriteImpl(database, pathNameNew, oldData))) {
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return false;
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}
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return await eaglerDeleteImpl(database, pathNameOld);
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}
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eagruntimeImpl.platformFilesystem["eaglerMove"] = new WebAssembly.Suspending(eaglerMoveImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathNameOld
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* @param {string} pathNameNew
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* @return {Promise<boolean>}
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*/
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async function eaglerCopyImpl(database, pathNameOld, pathNameNew) {
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const oldData = await eaglerReadImpl(database, pathNameOld);
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return oldData && (await eaglerWriteImpl(database, pathNameNew, oldData));
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}
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eagruntimeImpl.platformFilesystem["eaglerCopy"] = new WebAssembly.Suspending(eaglerCopyImpl);
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @return {Promise}
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*/
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function eaglerSizeImpl(database, pathName) {
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return new Promise(function(resolve) {
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const tx = database.transaction("filesystem", "readonly");
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const r = tx.objectStore("filesystem").get([pathName]);
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r.addEventListener("success", function() {
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const data = readDBRow(r.result);
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resolve(data ? data.byteLength : -1);
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});
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r.addEventListener("error", function() {
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resolve(-1);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerSize"] = new WebAssembly.Suspending(eaglerSizeImpl);
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/**
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* @param {string} str
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* @return {number}
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*/
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function countSlashes(str) {
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if(str.length === 0) return -1;
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var j = 0;
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for(var i = 0, l = str.length; i < l; ++i) {
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if(str.charCodeAt(i) === 47) {
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++j;
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}
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}
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return j;
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}
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/**
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* @param {IDBDatabase} database
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* @param {string} pathName
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* @param {number} recursive
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* @return {Promise}
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*/
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function eaglerIterateImpl(database, pathName, recursive) {
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return new Promise(function(resolve) {
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const rows = [];
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const tx = database.transaction("filesystem", "readonly");
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const r = tx.objectStore("filesystem").openCursor();
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const b = pathName.length === 0;
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const pc = recursive ? -1 : countSlashes(pathName);
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r.addEventListener("success", function() {
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const c = r.result;
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if(c === null || c.key === null) {
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resolve({
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"length": rows.length,
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/**
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* @param {number} idx
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* @return {string}
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*/
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"getRow": function(idx) {
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return rows[idx];
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}
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});
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return;
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}
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const k = readDBKey(c.key);
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if(k != null) {
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if((b || k.startsWith(pathName)) && (recursive || countSlashes(k) === pc)) {
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rows.push(k);
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}
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}
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c.continue();
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});
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r.addEventListener("error", function() {
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resolve(null);
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});
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});
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}
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eagruntimeImpl.platformFilesystem["eaglerIterate"] = new WebAssembly.Suspending(eaglerIterateImpl);
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