filesystem.class.js

class FilesystemDisplay {
    constructor(opts) {
        if (!opts.parentId) throw "Missing options";

        const fs = require("fs");
        const path = require("path");
        this.cwd = [];
        this.cwd_path = null;
        this.iconcolor = `rgb(${window.theme.r}, ${window.theme.g}, ${window.theme.b})`;
        this._formatBytes = (a,b) => {if(0==a)return"0 Bytes";var c=1024,d=b||2,e=["Bytes","KB","MB","GB","TB","PB","EB","ZB","YB"],f=Math.floor(Math.log(a)/Math.log(c));return parseFloat((a/Math.pow(c,f)).toFixed(d))+" "+e[f]};
        this.fileIconsMatcher = require("./assets/misc/file-icons-match.js");
        this.icons = require("./assets/icons/file-icons.json");
        this.edexIcons = {
            theme: {
                width: 24,
                height: 24,
                svg: '<path d="M 17.9994,3.99805L 17.9994,2.99805C 17.9994,2.44604 17.5514,1.99805 16.9994,1.99805L 4.9994,1.99805C 4.4474,1.99805 3.9994,2.44604 3.9994,2.99805L 3.9994,6.99805C 3.9994,7.55005 4.4474,7.99805 4.9994,7.99805L 16.9994,7.99805C 17.5514,7.99805 17.9994,7.55005 17.9994,6.99805L 17.9994,5.99805L 18.9994,5.99805L 18.9994,9.99805L 8.9994,9.99805L 8.9994,20.998C 8.9994,21.55 9.4474,21.998 9.9994,21.998L 11.9994,21.998C 12.5514,21.998 12.9994,21.55 12.9994,20.998L 12.9994,11.998L 20.9994,11.998L 20.9994,3.99805L 17.9994,3.99805 Z"/>'
            },
            themesDir: {
                width: 24,
                height: 24,
                svg: `<path d="m9.9994 3.9981h-6c-1.105 0-1.99 0.896-1.99 2l-0.01 12c0 1.104 0.895 2 2 2h16c1.104 0 2-0.896 2-2v-9.9999c0-1.104-0.896-2-2-2h-8l-1.9996-2z" stroke-width=".2"/><path stroke-linejoin="round" d="m18.8 9.3628v-0.43111c0-0.23797-0.19314-0.43111-0.43111-0.43111h-5.173c-0.23797 0-0.43111 0.19313-0.43111 0.43111v1.7244c0 0.23797 0.19314 0.43111 0.43111 0.43111h5.1733c0.23797 0 0.43111-0.19314 0.43111-0.43111v-0.43111h0.43111v1.7244h-4.3111v4.7422c0 0.23797 0.19314 0.43111 0.43111 0.43111h0.86221c0.23797 0 0.43111-0.19314 0.43111-0.43111v-3.879h3.449v-3.4492z" stroke-width=".086221" fill="${window.theme.colors.light_black}"/>`
            },
            kblayout: {
                width: 24,
                height: 24,
                svg: '<path d="M 18.9994,9.99807L 16.9994,9.99807L 16.9994,7.99807L 18.9994,7.99807M 18.9994,12.9981L 16.9994,12.9981L 16.9994,10.9981L 18.9994,10.9981M 15.9994,9.99807L 13.9994,9.99807L 13.9994,7.99807L 15.9994,7.99807M 15.9994,12.9981L 13.9994,12.9981L 13.9994,10.9981L 15.9994,10.9981M 15.9994,16.9981L 7.99941,16.9981L 7.99941,14.9981L 15.9994,14.9981M 6.99941,9.99807L 4.99941,9.99807L 4.99941,7.99807L 6.99941,7.99807M 6.99941,12.9981L 4.99941,12.9981L 4.99941,10.9981L 6.99941,10.9981M 7.99941,10.9981L 9.99941,10.9981L 9.99941,12.9981L 7.99941,12.9981M 7.99941,7.99807L 9.99941,7.99807L 9.99941,9.99807L 7.99941,9.99807M 10.9994,10.9981L 12.9994,10.9981L 12.9994,12.9981L 10.9994,12.9981M 10.9994,7.99807L 12.9994,7.99807L 12.9994,9.99807L 10.9994,9.99807M 19.9994,4.99807L 3.99941,4.99807C 2.89441,4.99807 2.0094,5.89406 2.0094,6.99807L 1.99941,16.9981C 1.99941,18.1021 2.89441,18.9981 3.99941,18.9981L 19.9994,18.9981C 21.1034,18.9981 21.9994,18.1021 21.9994,16.9981L 21.9994,6.99807C 21.9994,5.89406 21.1034,4.99807 19.9994,4.99807 Z"/>'
            },
            kblayoutsDir: {
                width: 24,
                height: 24,
                svg: `<path d="m9.9994 3.9981h-6c-1.105 0-1.99 0.896-1.99 2l-0.01 12c0 1.104 0.895 2 2 2h16c1.104 0 2-0.896 2-2v-9.9999c0-1.104-0.896-2-2-2h-8l-1.9996-2z" stroke-width=".2"/><path stroke-linejoin="round" d="m17.48 11.949h-1.14v-1.14h1.14m0 2.8499h-1.14v-1.14h1.14m-1.7099-0.56999h-1.14v-1.14h1.14m0 2.8499h-1.14v-1.14h1.14m0 3.4199h-4.56v-1.14h4.56m-5.13-2.85h-1.1399v-1.14h1.14m0 2.8499h-1.1399v-1.14h1.14m0.56998 0h1.14v1.14h-1.14m0-2.8499h1.14v1.14h-1.14m1.7099 0.56999h1.14v1.14h-1.14m0-2.8499h1.14v1.14h-1.14m5.13-2.8494h-9.1199c-0.62982 0-1.1343 0.51069-1.1343 1.14l-0.0057 5.6998c0 0.62925 0.51013 1.14 1.14 1.14h9.1196c0.62925 0 1.14-0.5107 1.14-1.14v-5.6998c0-0.62926-0.5107-1.14-1.14-1.14z" stroke-width="0.114" fill="${window.theme.colors.light_black}"/>`
            },
            settings: {
                width: 24,
                height: 24,
                svg: '<path d="M 11.9994,15.498C 10.0664,15.498 8.49939,13.931 8.49939,11.998C 8.49939,10.0651 10.0664,8.49805 11.9994,8.49805C 13.9324,8.49805 15.4994,10.0651 15.4994,11.998C 15.4994,13.931 13.9324,15.498 11.9994,15.498 Z M 19.4284,12.9741C 19.4704,12.6531 19.4984,12.329 19.4984,11.998C 19.4984,11.6671 19.4704,11.343 19.4284,11.022L 21.5414,9.36804C 21.7294,9.21606 21.7844,8.94604 21.6594,8.73004L 19.6594,5.26605C 19.5354,5.05005 19.2734,4.96204 19.0474,5.04907L 16.5584,6.05206C 16.0424,5.65607 15.4774,5.32104 14.8684,5.06903L 14.4934,2.41907C 14.4554,2.18103 14.2484,1.99805 13.9994,1.99805L 9.99939,1.99805C 9.74939,1.99805 9.5434,2.18103 9.5054,2.41907L 9.1304,5.06805C 8.52039,5.32104 7.95538,5.65607 7.43939,6.05206L 4.95139,5.04907C 4.7254,4.96204 4.46338,5.05005 4.33939,5.26605L 2.33939,8.73004C 2.21439,8.94604 2.26938,9.21606 2.4574,9.36804L 4.5694,11.022C 4.5274,11.342 4.49939,11.6671 4.49939,11.998C 4.49939,12.329 4.5274,12.6541 4.5694,12.9741L 2.4574,14.6271C 2.26938,14.78 2.21439,15.05 2.33939,15.2661L 4.33939,18.73C 4.46338,18.946 4.7254,19.0341 4.95139,18.947L 7.4404,17.944C 7.95639,18.34 8.52139,18.675 9.1304,18.9271L 9.5054,21.577C 9.5434,21.8151 9.74939,21.998 9.99939,21.998L 13.9994,21.998C 14.2484,21.998 14.4554,21.8151 14.4934,21.577L 14.8684,18.9271C 15.4764,18.6741 16.0414,18.34 16.5574,17.9431L 19.0474,18.947C 19.2734,19.0341 19.5354,18.946 19.6594,18.73L 21.6594,15.2661C 21.7844,15.05 21.7294,14.78 21.5414,14.6271L 19.4284,12.9741 Z"/>'
            }
        };

        const container = document.getElementById(opts.parentId);
        container.innerHTML = `
            <h3 class="title"><p>FILESYSTEM</p><p id="fs_disp_title_dir"></p></h3>
            <div id="fs_disp_container">
            </div>
            <div id="fs_space_bar">
                <h1>EXIT DISPLAY</h1>
                <h3>Calculating available space...</h3><progress value="100" max="100"></progress>
            </div>`;
        this.filesContainer = document.getElementById("fs_disp_container");
        this.space_bar = {
            text: document.querySelector("#fs_space_bar > h3"),
            bar: document.querySelector("#fs_space_bar > progress")
        };
        this.fsBlock = {};
        this.dirpath = "";
        this.failed = false;
        this._noTracking = false;
        this._runNextTick = false;
        this._reading = false;

        this._timer = setInterval(() => {
            if (this._runNextTick === true) {
                this._runNextTick = false;
                this.readFS(this.dirpath);
            }
        }, 1000);

        this._asyncFSwrapper = new Proxy(fs, {
            get: function(fs, prop) {
                if (prop in fs) {
                    return function(...args) {
                        return new Promise((resolve, reject) => {
                            fs[prop](...args, (err, d) => {
                                if (typeof err !== "undefined" && err !== null) reject(err);
                                if (typeof d !== "undefined") resolve(d);
                                if (typeof d === "undefined" && typeof err === "undefined") resolve();
                            });
                        });
                    }
                }
            },
            set: function() {
                return false;
            }
        });

        this.setFailedState = () => {
            this.failed = true;
            container.innerHTML = `
            <h3 class="title"><p>FILESYSTEM</p><p id="fs_disp_title_dir">EXECUTION FAILED</p></h3>
            <h2 id="fs_disp_error">CANNOT ACCESS CURRENT WORKING DIRECTORY</h2>`;
        };

        this.followTab = () => {
            // Don't follow tabs when running in detached mode, see #432
            if (this._noTracking) return false;

            let num = window.currentTerm;

            window.term[num].oncwdchange = cwd => {
                // See #501
                if (this._noTracking) return false;

                if (cwd && cwd !== this.cwd_path && window.currentTerm === num) {
                    this.cwd_path = cwd;
                    if (this._fsWatcher) {
                        this._fsWatcher.close();
                    }
                    if (cwd.startsWith("FALLBACK |-- ")) {
                        this.readFS(cwd.slice(13));
                        this._noTracking = true;
                    } else {
                        this.readFS(cwd);
                        this.watchFS(cwd);
                    }
                }
            };
        };
        this.followTab();

        this.watchFS = dir => {
            if (this._fsWatcher) {
                this._fsWatcher.close();
            }
            this._fsWatcher = fs.watch(dir, (eventType, filename) => {
                if (eventType != "change") { // #758 - Don't refresh file view if only file contents have changed.
                    this._runNextTick = true;
                }
            });
        };

        this.toggleHidedotfiles = () => {
            if (window.settings.hideDotfiles) {
                container.classList.remove("hideDotfiles");
                window.settings.hideDotfiles = false;
            } else {
                container.classList.add("hideDotfiles");
                window.settings.hideDotfiles = true;
            }
        };

        this.toggleListview = () => {
            if (window.settings.fsListView) {
                container.classList.remove("list-view");
                window.settings.fsListView = false;
            } else {
                container.classList.add("list-view");
                window.settings.fsListView = true;
            }
        };

        this.readFS = async dir => {
            if (this.failed === true || this._reading) return false;
            this._reading = true;

            document.getElementById("fs_disp_title_dir").innerText = this.dirpath;
            this.filesContainer.setAttribute("class", "");
            this.filesContainer.innerHTML = "";
            if (this._noTracking) {
                document.querySelector("section#filesystem > h3.title > p:first-of-type").innerText = "FILESYSTEM - TRACKING FAILED, RUNNING DETACHED FROM TTY";
            }

            if (process.platform === "win32" && dir.endsWith(":")) dir = dir+"\\";
            let tcwd = dir;
            let content = await this._asyncFSwrapper.readdir(tcwd).catch(err => {
                console.warn(err);
                if (this._noTracking === true && this.dirpath) { // #262
                    this.setFailedState();
                    setTimeout(() => {
                        this.readFS(this.dirpath);
                    }, 1000);
                } else {
                    this.setFailedState();
                }
            });

            this.reCalculateDiskUsage(tcwd);

            this.cwd = [];

            await new Promise((resolve, reject) => {
                if (content.length === 0) resolve();

                content.forEach(async (file, i) => {
                    let fstat = await this._asyncFSwrapper.lstat(path.join(tcwd, file)).catch(e => {
                        if (!e.message.includes("EPERM") && !e.message.includes("EBUSY")) {
                            reject();
                        }
                    });

                    let e = {
                        name: window._escapeHtml(file),
                        path: path.resolve(tcwd, file),
                        type: "other",
                        category: "other",
                        hidden: false
                    };

                    if (typeof fstat !== "undefined") {
                        e.lastAccessed = fstat.mtime.getTime();

                        if (fstat.isDirectory()) {
                            e.category = "dir";
                            e.type = "dir";
                        }
                        if (e.category === "dir" && tcwd === settingsDir && file === "themes") e.type="edex-themesDir";
                        if (e.category === "dir" && tcwd === settingsDir && file === "keyboards") e.type = "edex-kblayoutsDir";

                        if (fstat.isSymbolicLink()) {
                            e.category = "symlink";
                            e.type = "symlink";
                        }

                        if (fstat.isFile()) {
                            e.category = "file";
                            e.type = "file";
                            e.size = fstat.size;
                        }
                    } else {
                        e.type = "system";
                        e.hidden = true;
                    }

                    if (e.category === "file" && tcwd === themesDir && file.endsWith(".json")) e.type = "edex-theme";
                    if (e.category === "file" && tcwd === keyboardsDir && file.endsWith(".json")) e.type = "edex-kblayout";
                    if (e.category === "file" && tcwd === settingsDir && file === "settings.json") e.type = "edex-settings";
                    if (e.category === "file" && tcwd === settingsDir && file === "shortcuts.json") e.type = "edex-shortcuts";

                    if (file.startsWith(".")) e.hidden = true;

                    this.cwd.push(e);
                    if (i === content.length-1) resolve();
                });
            }).catch(() => { this.setFailedState() });

            if (this.failed) return false;

            let ordering = {
                dir: 0,
                symlink: 1,
                file: 2,
                other: 3
            };

            this.cwd.sort((a, b) => {
                return (ordering[a.category] - ordering[b.category] || a.name.localeCompare(b.name));
            });

            this.cwd.splice(0, 0, {
                name: "Show disks",
                type: "showDisks"
            });

            if (tcwd !== "/" && /^[A-Z]:\\$/i.test(tcwd) === false) {
                this.cwd.splice(1, 0, {
                    name: "Go up",
                    type: "up"
                });
            }

            this.dirpath = tcwd;
            this.render(this.cwd);
            this._reading = false;
        };

        this.readDevices = async () => {
            if (this.failed === true) return false;

            let blocks = await window.si.blockDevices();
            let devices = [];
            blocks.forEach(block => {
                if (fs.existsSync(block.mount)) {
                    let type = (block.type === "rom") ? "rom" : "disk";
                    if (block.removable && block.type !== "rom") {
                        type = "usb";
                    }

                    devices.push({
                        name: (block.label !== "") ? `${block.label} (${block.name})` : `${block.mount} (${block.name})`,
                        type,
                        path: block.mount
                    });
                }
            });

            this.render(devices, true);
        };

        this.render = async (originBlockList, isDiskView) => {
            // Work on a clone of the blocklist to avoid altering fsDisp.cwd
            let blockList = JSON.parse(JSON.stringify(originBlockList));

            if (this.failed === true) return false;

            if (isDiskView) {
                document.getElementById("fs_disp_title_dir").innerText = "Showing available block devices";
                this.filesContainer.setAttribute("class", "disks");
            } else {
                document.getElementById("fs_disp_title_dir").innerText = this.dirpath;
                this.filesContainer.setAttribute("class", "");
            }
            if (this._noTracking) {
                document.querySelector("section#filesystem > h3.title > p:first-of-type").innerText = "FILESYSTEM - TRACKING FAILED, RUNNING DETACHED FROM TTY";
            }

            let filesDOM = ``;
            blockList.forEach((e, blockIndex) => {
                let hidden = e.hidden ? " hidden" : "";

                let cmdPrefix = `if (window.keyboard.container.dataset.isCtrlOn == "true") {
                                electron.shell.openPath(fsDisp.cwd[${blockIndex}].path);
                                electronWin.minimize();
                            } else if (window.keyboard.container.dataset.isShiftOn == "true") {
                                window.term[window.currentTerm].write("\\""+fsDisp.cwd[${blockIndex}].path+"\\"");
                            } else {
                          `.replace(/\n+ */g, ''); // Minify

                let cmdSuffix = `}`;

                let cmd;

                if (!this._noTracking) {
                    if (e.type === "dir" || e.type.endsWith("Dir")) {
                        cmd = `window.term[window.currentTerm].writelr("cd \\""+fsDisp.cwd[${blockIndex}].name+"\\"")`;
                    } else if (e.type === "up") {
                        cmd = `window.term[window.currentTerm].writelr("cd ..")`;
                    } else if (e.type === "disk" || e.type === "rom" || e.type === "usb") {
                        if (process.platform === "win32") {
                            cmd = `window.term[window.currentTerm].writelr("${e.path.replace(/\\/g, '')}")`;
                        } else {
                            cmd = `window.term[window.currentTerm].writelr("cd \\"${e.path.replace(/\\/g, '')}\\"")`;
                        }
                    } else {
                        cmd = `window.term[window.currentTerm].write("\\""+fsDisp.cwd[${blockIndex}].path+"\\"")`;
                    }
                } else {
                    if (e.type === "dir" || e.type.endsWith("Dir")) {
                        cmd = `window.fsDisp.readFS(fsDisp.cwd[${blockIndex}].path)`;
                    } else if (e.type === "up") {
                        cmd = `window.fsDisp.readFS(path.resolve(window.fsDisp.dirpath, ".."))`;
                    } else if (e.type === "disk" || e.type === "rom" || e.type === "usb") {
                        cmd = `window.fsDisp.readFS("${e.path.replace(/\\/g, '')}")`;
                    } else {
                        cmd = `window.term[window.currentTerm].write("\\""+fsDisp.cwd[${blockIndex}].path+"\\"")`;
                    }
                }

                if (e.type === "file") {
                    cmd = `window.fsDisp.openFile(${blockIndex})`;
                }

                if (e.type === "system") {
                    cmd = "";
                }

                if (e.type === "showDisks") {
                    cmd = `window.fsDisp.readDevices()`;
                    cmdPrefix = '';
                    cmdSuffix = '';
                }

                if (e.type === "up") {
                    // cmd is OS-specific and defined above
                    cmdPrefix = '';
                    cmdSuffix = '';
                }

                if (e.type === "edex-theme") {
                    cmd = `window.themeChanger("${e.name.slice(0, -5)}")`;
                }
                if (e.type === "edex-kblayout") {
                    cmd = `window.remakeKeyboard("${e.name.slice(0, -5)}")`;
                }
                if (e.type === "edex-settings") {
                    cmd = `window.openSettings()`;
                }
                if (e.type === "edex-shortcuts") {
                    cmd = `window.openShortcutsHelp()`;
                }

                let icon = "";
                let type = "";
                switch(e.type) {
                    case "showDisks":
                        icon = this.icons.showDisks;
                        type = "--";
                        e.category = "showDisks";
                        break;
                    case "up":
                        icon = this.icons.up;
                        type = "--";
                        e.category = "up";
                        break;
                    case "symlink":
                        icon = this.icons.symlink;
                        break;
                    case "disk":
                        icon = this.icons.disk;
                        break;
                    case "rom":
                        icon = this.icons.rom;
                        break;
                    case "usb":
                        icon = this.icons.usb;
                        break;
                    case "edex-theme":
                        icon = this.edexIcons.theme;
                        type = "eDEX-UI theme";
                        break;
                    case "edex-kblayout":
                        icon = this.edexIcons.kblayout;
                        type = "eDEX-UI keyboard layout";
                        break;
                    case "edex-settings":
                    case "edex-shortcuts":
                        icon = this.edexIcons.settings;
                        type = "eDEX-UI config file";
                        break;
                    case "system":
                        icon = this.edexIcons.settings;
                        break;
                    case "edex-themesDir":
                        icon = this.edexIcons.themesDir;
                        type = "eDEX-UI themes folder";
                        break;
                    case "edex-kblayoutsDir":
                        icon = this.edexIcons.kblayoutsDir;
                        type = "eDEX-UI keyboards folder";
                        break;
                    default:
                        let iconName = this.fileIconsMatcher(e.name);
                        icon = this.icons[iconName];
                        if (typeof icon === "undefined") {
                            if (e.type === "file") icon = this.icons.file;
                            if (e.type === "dir") {
                                icon = this.icons.dir;
                                type = "folder";
                            }
                            if (typeof icon === "undefined") icon = this.icons.other;
                        } else if (e.category !== "dir") {
                            type = iconName.replace("icon-", "");
                        } else {
                            type = "special folder";
                        }
                        break;
                }

                if (type === "") type = e.type;
                e.type = type;

                // Handle displayable media
                if (e.type === 'video' || e.type === 'audio' || e.type === 'image') {
                    this.cwd[blockIndex].type = e.type;
                    cmd = `window.fsDisp.openMedia(${blockIndex})`;
                }

                if (typeof e.size === "number") {
                    e.size = this._formatBytes(e.size);
                } else {
                    e.size = "--";
                }
                if (typeof e.lastAccessed === "number") {
                    e.lastAccessed = new Date(e.lastAccessed).toLocaleString();
                } else {
                    e.lastAccessed = "--";
                }

                filesDOM += `<div class="fs_disp_${e.type}${hidden} animationWait" onclick='${cmdPrefix+cmd+cmdSuffix}'>
                                <svg viewBox="0 0 ${icon.width} ${icon.height}" fill="${this.iconcolor}">
                                    ${icon.svg}
                                </svg>
                                <h3>${e.name}</h3>
                                <h4>${type}</h4>
                                <h4>${e.size}</h4>
                                <h4>${e.lastAccessed}</h4>
                            </div>`;
            });
            this.filesContainer.innerHTML = filesDOM;

            if (this.filesContainer.getAttribute("class").endsWith("disks")) {
                document.getElementById("fs_space_bar").setAttribute("onclick", "window.fsDisp.render(window.fsDisp.cwd)");
            } else {
                document.getElementById("fs_space_bar").setAttribute("onclick", "");
            }

            // Render animation
            let id = 0;
            while (this.filesContainer.childNodes[id]) {
                let e = this.filesContainer.childNodes[id];
                e.setAttribute("class", e.className.replace(" animationWait", ""));

                if (window.settings.hideDotfiles !== true || e.className.indexOf("hidden") === -1) {
                    window.audioManager.folder.play();
                    await _delay(30);
                }

                id++;
            }
        };

        this.reCalculateDiskUsage = async path => {
            this.fsBlock = null;
            this.space_bar.text.innerHTML = "Calculating available space...";
            this.space_bar.bar.removeAttribute("value");

            window.si.fsSize().catch(() => {
                this.space_bar.text.innerHTML = "Could not calculate mountpoint usage.";
                this.space_bar.bar.value = 100;
            }).then(d => {
                d.forEach(fsBlock => {
                    if (path.startsWith(fsBlock.mount)) {
                        this.fsBlock = fsBlock;
                    }
                });
                this.renderDiskUsage(this.fsBlock);
            });
        };

        this.renderDiskUsage = async fsBlock => {
            if (document.getElementById("fs_space_bar").getAttribute("onclick") !== "" || fsBlock === null) return;

            let splitter = (process.platform === "win32") ? "\\" : "/";
            let displayMount = (fsBlock.mount.length < 18) ? fsBlock.mount : "..."+splitter+fsBlock.mount.split(splitter).pop();

            // See #226
            if (!isNaN(fsBlock.use)) {
                this.space_bar.text.innerHTML = `Mount <strong>${displayMount}</strong> used <strong>${Math.round(fsBlock.use)}%</strong>`;
                this.space_bar.bar.value = Math.round(fsBlock.use);
            } else if (!isNaN((fsBlock.size / fsBlock.used) * 100)) {
                let usage = Math.round((fsBlock.size / fsBlock.used) * 100);

                this.space_bar.text.innerHTML = `Mount <strong>${displayMount}</strong> used <strong>${usage}%</strong>`;
                this.space_bar.bar.value = usage;
            } else {
                this.space_bar.text.innerHTML = "Could not calculate mountpoint usage.";
                this.space_bar.bar.value = 100;
            }
        };

        // Automatically start indexing supposed beginning CWD
        // See #365
        // ...except if we're hot-reloading, in which case this can mess up the rendering
        // See #392
        if (window.performance.navigation.type === 0) {
            this.readFS(window.term[window.currentTerm].cwd || window.settings.cwd);
        }

        this.openFile = (name, path, type) => { //Might add text formatting at some point, not now though - Surge
            let block;

            if (typeof name === "number") {
                block = this.cwd[name];
                name = block.name;
            }

            let mime = require("mime-types");

            block.path = block.path.replace(/\\/g, "/");

            let filetype = mime.lookup(name.split(".")[name.split(".").length - 1]);
            switch (filetype) {
                case "application/pdf":
                    let html = `<div>
                        <div class="pdf_options">
                            <button class="zoom_in">
                                <svg viewBox="0 0 ${this.icons["zoom-in"].width} ${this.icons["zoom-in"].height}" fill="${this.iconcolor}">
                                    ${this.icons["zoom-in"].svg}
                                </svg>
                            </button>
                            <button class="zoom_out">
                                <svg viewBox="0 0 ${this.icons["zoom-out"].width} ${this.icons["zoom-out"].height}" fill="${this.iconcolor}">
                                    ${this.icons["zoom-out"].svg}
                                </svg>
                            </button>
                            <button class="previous_page">
                                <svg viewBox="0 0 ${this.icons["backwards"].width} ${this.icons["backwards"].height}" fill="${this.iconcolor}">
                                    ${this.icons["backwards"].svg}
                                </svg>
                            </button>
                            <span>Page: <span class="page_num"/></span><span>/</span> <span class="page_count"></span></span>
                            <button class="next_page">
                                <svg viewBox="0 0 ${this.icons["forwards"].width} ${this.icons["forwards"].height}" fill="${this.iconcolor}">
                                    ${this.icons["forwards"].svg}
                                </svg>
                            </button>
                        </div>
                        <div class="pdf_container fsDisp_mediaDisp">
                            <canvas class="pdf_canvas" />
                        </div>
                    </div>`;
                    const newModal = new Modal(
                        {
                            type: "custom",
                            title: _escapeHtml(name),
                            html: html
                        }
                    );
                    new DocReader(
                        {
                            modalId: newModal.id,
                            path: block.path
                        }
                    );
                    break;
                default:
                    if (mime.charset(filetype) === "UTF-8") {
                        fs.readFile(block.path, 'utf-8', (err, data) => {
                            if (err) {
                                new Modal({
                                    type: "info",
                                    title: "Failed to load file: " + block.path,
                                    html: err
                                });
                                console.log(err);
                            };
                            window.keyboard.detach();
                            new Modal(
                                {
                                    type: "custom",
                                    title: _escapeHtml(name),
                                    html: `<textarea id="fileEdit" rows="40" cols="150" spellcheck="false">${data}</textarea><p id="fedit-status"></p>`,
                                    buttons: [
                                        {label:"Save to Disk",action:`window.writeFile('${block.path}')`}
                                    ]
                                }, () => {
                                    window.keyboard.attach();
                                    window.term[window.currentTerm].term.focus();
                                }
                            );
                        });
                   break;
                }
            }
        };

        this.openMedia = (name, path, type) => {
            let block, html;

            if (typeof name === "number") {
                block = this.cwd[name];
                name = block.name;
            }

            block.path = block.path.replace(/\\/g, "/");

            switch (type || block.type) {
                case "image":
                    html = `<img class="fsDisp_mediaDisp" src="${window._encodePathURI(path || block.path)}" ondragstart="return false;">`;
                    break;
                case "audio":
                    html = `<div>
                                <div class="media_container" data-fullscreen="false">
                                    <audio class="media fsDisp_mediaDisp" preload="auto">
                                        <source src="${window._encodePathURI(path || block.path)}">
                                        Unsupported audio format!
                                    </audio>
                                    <div class="media_controls" data-state="hidden">
                                        <div class="playpause media_button" data-state="play">
                                            <svg viewBox="0 0 ${this.icons["play"].width} ${this.icons["play"].height}" fill="${this.iconcolor}">
                                                ${this.icons["play"].svg}
                                            </svg>
                                        </div>
                                        <div class="progress_container">
                                            <div class="progress">
                                                <span class="progress_bar"></span>
                                            </div>
                                        </div>
                                        <div class="media_time">00:00:00</div>
                                        <div class="volume_icon">
                                            <svg viewBox="0 0 ${this.icons["volume"].width} ${this.icons["volume"].height}" fill="${this.iconcolor}">
                                                ${this.icons["volume"].svg}
                                            </svg>
                                        </div>
                                        <div class="volume">
                                            <div class="volume_bkg"></div>
                                            <div class="volume_bar"></div>
                                        </div>
                                    </div>
                                </div>
                            </div>`;
                    break;
                case "video":
                    html = `<div>
                                <div class="media_container" data-fullscreen="false">
                                    <video class="media fsDisp_mediaDisp" preload="auto">
                                        <source src="${window._encodePathURI(path || block.path)}">
                                        Unsupported video format!
                                    </video>
                                    <div class="media_controls" data-state="hidden">
                                        <div class="playpause media_button" data-state="play">
                                            <svg viewBox="0 0 ${this.icons["play"].width} ${this.icons["play"].height}" fill="${this.iconcolor}">
                                                ${this.icons["play"].svg}
                                            </svg>
                                        </div>
                                        <div class="progress_container">
                                            <div class="progress">
                                                <span class="progress_bar"></span>
                                            </div>
                                        </div>
                                        <div class="media_time">00:00:00</div>
                                        <div class="volume_icon">
                                            <svg viewBox="0 0 ${this.icons["volume"].width} ${this.icons["volume"].height}" fill="${this.iconcolor}">
                                                ${this.icons["volume"].svg}
                                            </svg>
                                        </div>
                                        <div class="volume">
                                            <div class="volume_bkg"></div>
                                            <div class="volume_bar"></div>
                                        </div>
                                        <div class="fs media_button" data-state="go-fullscreen">
                                            <svg viewBox="0 0 ${this.icons["fullscreen"].width} ${this.icons["fullscreen"].height}" fill="${this.iconcolor}">
                                                ${this.icons["fullscreen"].svg}
                                            </svg>
                                        </div>
                                    </div>
                                </div>
                            </div>`;
                    break;
                default:
                    throw new Error("fsDisp media displayer: unknown type " + (type || block.type));
            }

            const newModal = new Modal({
                type: "custom",
                title: _escapeHtml(name),
                html
            });
            if (block.type === "audio" || block.type === "video") {
                new MediaPlayer({
                    modalId: newModal.id,
                    path: block.path,
                    type: block.type
                });
            }
        };
    }
}

module.exports = {
    FilesystemDisplay
};