"use strict";
/*
This handles request to share/raw/[sha1]/[relative path].

It confirms that the request is valid (so the content is
actually currently publicly shared) then sends the result.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.staticHandler = void 0;
var path_1 = require("path");
var express_1 = require("express");
var serve_index_1 = __importDefault(require("serve-index"));
var util_1 = require("./util");
var path_to_files_1 = require("./path-to-files");
var lru_cache_1 = __importDefault(require("lru-cache"));
function handle(options) {
    return __awaiter(this, void 0, void 0, function () {
        var err_1;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    _a.trys.push([0, 2, , 3]);
                    return [4 /*yield*/, handleRequest(options)];
                case 1:
                    _a.sent();
                    return [3 /*break*/, 3];
                case 2:
                    err_1 = _a.sent();
                    // some other error
                    options.res.send("Error: ".concat(err_1));
                    return [3 /*break*/, 3];
                case 3: return [2 /*return*/];
            }
        });
    });
}
exports.default = handle;
function handleRequest(opts) {
    return __awaiter(this, void 0, void 0, function () {
        var id, pathEncoded, req, res, download, next, path, _a, fsPath, projectPath, url, target, ext, i;
        return __generator(this, function (_b) {
            switch (_b.label) {
                case 0:
                    id = opts.id, pathEncoded = opts.path, req = opts.req, res = opts.res, download = opts.download, next = opts.next;
                    if (!(0, util_1.isSha1Hash)(id)) {
                        throw Error("id=".concat(id, " is not a sha1 hash"));
                    }
                    path = decodeURIComponent(pathEncoded);
                    // the above must come before this check (since dots could be somehow encoded)
                    if (path.includes("..")) {
                        throw Error("path (=\"".concat(path, "\") must not include \"..\""));
                    }
                    return [4 /*yield*/, (0, path_to_files_1.pathFromID)(id)];
                case 1:
                    _a = _b.sent(), fsPath = _a.fsPath, projectPath = _a.projectPath;
                    if (!path.startsWith(projectPath)) {
                        // The projectPath absolutely must be an initial segment of the requested path.
                        // We do NOT just use a relative path *inside* the share, because the share might be a file itself
                        // and then the MIME type wouldn't be a function of the URL.
                        throw Error("path (=\"".concat(path, "\") must start with \"").concat(projectPath, "\""));
                    }
                    url = path.slice(projectPath.length);
                    target = (0, path_1.join)(fsPath, url);
                    ext = (0, util_1.getExtension)(target);
                    if (download || ext == "html" || ext == "svg") {
                        // NOTE: We *always* download .html, since it is far too dangerous to render
                        // an arbitrary html file from our domain.
                        res.download(target, next);
                        return [2 /*return*/];
                    }
                    if (!url) {
                        i = fsPath.lastIndexOf("/");
                        if (i == -1) {
                            // This can't actually happen, since fsPath is an absolute filesystem path, hence starts with /
                            throw Error("invalid fsPath=".concat(fsPath));
                        }
                        url = fsPath.slice(i);
                        fsPath = fsPath.slice(0, i);
                    }
                    req.url = url;
                    staticHandler(fsPath, req, res, next);
                    return [2 /*return*/];
            }
        });
    });
}
function staticHandler(fsPath, req, res, next) {
    //console.log("staticHandler", { fsPath, url: req.url });
    var handler = getStaticFileHandler(fsPath);
    handler(req, res, function () {
        // Static handler didn't work, so try the directory listing handler.
        //console.log("directoryHandler", { fsPath, url: req.url });
        var handler = getDirectoryHandler(fsPath);
        handler(req, res, next);
    });
}
exports.staticHandler = staticHandler;
var staticFileCache = new lru_cache_1.default({ max: 200 });
function getStaticFileHandler(path) {
    if (staticFileCache.has(path)) {
        return staticFileCache.get(path);
    }
    var handler = (0, express_1.static)(path);
    staticFileCache.set(path, handler);
    return handler;
}
var directoryCache = new lru_cache_1.default({ max: 200 });
function getDirectoryHandler(path) {
    if (directoryCache.has(path)) {
        return directoryCache.get(path);
    }
    var handler = (0, serve_index_1.default)(path, { icons: true, view: "details" });
    directoryCache.set(path, handler);
    return handler;
}
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