/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
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());
    });
};
export function createStringDataTransferItem(stringOrPromise) {
    return {
        asString: () => __awaiter(this, void 0, void 0, function* () { return stringOrPromise; }),
        asFile: () => undefined,
        value: typeof stringOrPromise === 'string' ? stringOrPromise : undefined,
    };
}
export function createFileDataTransferItem(fileName, uri, data) {
    return {
        asString: () => __awaiter(this, void 0, void 0, function* () { return ''; }),
        asFile: () => ({ name: fileName, uri, data }),
        value: undefined,
    };
}
export class VSDataTransfer {
    constructor() {
        this._entries = new Map();
    }
    get size() {
        return this._entries.size;
    }
    has(mimeType) {
        return this._entries.has(this.toKey(mimeType));
    }
    get(mimeType) {
        var _a;
        return (_a = this._entries.get(this.toKey(mimeType))) === null || _a === void 0 ? void 0 : _a[0];
    }
    append(mimeType, value) {
        const existing = this._entries.get(mimeType);
        if (existing) {
            existing.push(value);
        }
        else {
            this._entries.set(this.toKey(mimeType), [value]);
        }
    }
    replace(mimeType, value) {
        this._entries.set(this.toKey(mimeType), [value]);
    }
    delete(mimeType) {
        this._entries.delete(this.toKey(mimeType));
    }
    *entries() {
        for (const [mine, items] of this._entries.entries()) {
            for (const item of items) {
                yield [mine, item];
            }
        }
    }
    values() {
        return Array.from(this._entries.values()).flat();
    }
    forEach(f) {
        for (const [mime, item] of this.entries()) {
            f(item, mime);
        }
    }
    toKey(mimeType) {
        return mimeType.toLowerCase();
    }
}