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/**
* 自動抓取網易雲音樂雙語歌詞並按行數奇偶分開，便於使用{{LyricsKai}}
* <s>最終目標是根據網易雲頁面自動生成條目源代碼</s>
*
* 日志：
* v0.01-190502 基本功能已經實現，但無法應對有空行分隔的歌詞，暫時的解決方法是用控制臺修改
* #lyric-content 的内容
* v0.021-190503 支持了自定義輸入歌詞；增加一個報錯
*
* 使用方法：打開音樂界面的控制臺，複製本段代碼並輸入lyric()；或傳入已分行的歌詞參數
* 内容將以一個數組（含分別代表中外兩語的兩個元素）呈現
**/
function lyric(lyricOrigin/*, format TODO：當傳入LyricsKai參數後自動格式化 */) {
var lyricTxt = new Array();
var lyricFmt = new Array();
var lyricOut = new Array();
var n, flag, diff;
if(!lyricOrigin) {
console.log('未輸入歌詞，自動查找歌詞...');
var lyric;
if (document.querySelector('.g-iframe')) {
if (document.querySelector('.g-iframe').contentWindow.document.querySelector('#lyric-content')) {
lyric = document.querySelector('.g-iframe').contentWindow.document.querySelector('#lyric-content');
n = lyric.querySelectorAll('br').length;
flag = '<br>';
diff = 4;
lyricTxt[0] = lyric.innerHTML;
} else {
return console.log('未找到歌詞，請檢查是否在網易雲！');
}
} else if (document.querySelector('#lyric-content')) {
lyric = document.querySelector('#lyric-content');
n = lyric.querySelectorAll('br').length;
flag = '<br>';
diff = 4;
lyricTxt[0] = lyric.innerHTML;
} else {
return console.log('未找到歌詞，請檢查是否在網易雲！');
}
} else {
if (typeof lyricOrigin == 'string') {
lyricTxt[0] = lyricOrigin;
if (lyricTxt[0].split('/n').length > 1 ) {
lyricTxt[0] += '/n';
flag = '/n';
n = lyricTxt[0].split('/n').length - 1;
diff = 2;
} else {
return console.log('未找到換行符，請將歌詞分行後輸入！');
}
} else {
return console.log('請檢查輸入值是否為字符（以""包裹）！');
}
}
for (i=0; i<n; i++) {
if (i==0) {
lyricFmt[i] = lyricTxt[i].substring(i, lyricTxt[0].indexOf(flag));
}
else {
lyricTxt[i] = lyricTxt[i-1].substring(lyricTxt[i-1].indexOf(flag) + diff);
lyricFmt[i] = lyricTxt[i].substring(0, lyricTxt[i].indexOf(flag));
}
}
for (i=0; i<n; i++) {
if (lyricFmt[i] == '') {
lyricOut[0]+='\n';
lyricOut[1]+='\n';
} else if (lyricOut[0]&&lyricOut[0].indexOf('\n\n')!=-1) {
var sum = 0;
var lyricTmp = new Array();
lyricTmp[0] = lyricOut[0];
for (j=1; j<lyricOut[0]; j++){
if (lyricTmp[j-1].indexOf('\n\n')!=-1) {
sum+=1;
lyricTmp[j] = lyricTmp[j-1].substring(lyricTmp[j-1].indexOf('\n\n'))
if (sum%2==0) {
if (i%2==0) {
lyricOut[0]+=lyricFmt[i]+'\n';
} else {
lyricOut[1]+=lyricFmt[i]+'\n';
}
} else {
if (i%2==0) {
lyricOut[1]+=lyricFmt[i]+'\n';
} else {
lyricOut[0]+=lyricFmt[i]+'\n';
}
}
} else {
// TODO：支持分段
}
}
} else {
if (i%2==0) {
lyricOut[1]+=lyricFmt[i]+'\n';
} else {
lyricOut[0]+=lyricFmt[i]+'\n';
}
}
}
return lyricOut;
}