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V2EX Image paster

Automatically uploads pasted images to Imgur on V2EX input boxes

// ==UserScript==
// @name         V2EX Image paster
// @namespace    v2ex-image-paster
// @version      1.0
// @description  Automatically uploads pasted images to Imgur on V2EX input boxes
// @match        https://www.v2ex.com/*
// @match        https://*
// @grant        GM_xmlhttpRequest
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // 监听粘贴事件
    document.addEventListener('paste', function(event) {
        var items = (event.clipboardData || event.originalEvent.clipboardData).items;
        for (var i = 0; i < items.length; i++) {
            var item = items[i];
            if (item.type.indexOf('image') !== -1) {
                // 获取粘贴的图片文件
                var file = item.getAsFile();

                // 上传图片到 Imgur
                uploadToImgur(file);

            }
        }
    });

    // 上传图片到 Imgur
    function uploadToImgur(file) {
        console.log('upload...')
        var formData = new FormData();
        formData.append('image', file);

        GM_xmlhttpRequest({
            method: 'POST',
            url: 'https://api.imgur.com/3/image',
            headers: {
                Authorization: 'Client-ID 1c49486ec8e9565'
            },
            data: formData,
            onload: function(response) {
                console.log(response)
                var json = JSON.parse(response.responseText);
                console.log(json)
                if (json.success) {
                    pasteTextAtCursor(`\n${json.data.link}`)
                }
            }
        });
    };
    function pasteTextAtCursor(text) {
        var textarea = document.activeElement;
        var startPos = textarea.selectionStart;
        var endPos = textarea.selectionEnd;

        textarea.value = textarea.value.substring(0, startPos) + text + textarea.value.substring(endPos);
        textarea.setSelectionRange(startPos + text.length, startPos + text.length);
    }
})();