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script

// remove sections that shouldn't be recursively processed
var START = 'J2MBLOCKPLACEHOLDER';
var replacementsList = [];
var counter = 0;

// determine if the user has selected some text in the current draft
let input = (draft.selectionLength > 0) ? editor.getTextInRange(draft.selectionStart, draft.selectionLength) : draft.content;

input = input.replace(/`{3,}(\w+)?((?:\n|.)+?)`{3,}/g, function(match, synt, content) {
	var code = '{code';

	if (synt) {
		code += ':' + synt;
	}

	code += '}' + content + '{code}';
	var key = START + counter++ + '%%';
	replacementsList.push({key: key, value: code});
	return key;
});

input = input.replace(/`([^`]+)`/g, function(match, content) {
	var code = '{{'+ content + '}}';
	var key = START + counter++ + '%%';
	replacementsList.push({key: key, value: code});
	return key;
});

input = input.replace(/`([^`]+)`/g, '{{$1}}');

input = input.replace(/^(.*?)\n([=-])+$/gm, function (match,content,level) {
	return 'h' + (level[0] === '=' ? 1 : 2) + '. ' + content;
});

input = input.replace(/^([#]+)(.*?)$/gm, function (match,level,content) {
	return 'h' + level.length + '.' + content;
});

input = input.replace(/([*_]+)(.*?)\1/g, function (match,wrapper,content) {
	var to = (wrapper.length === 1) ? '_' : '*';
	return to + content + to;
});

// multi-level bulleted list
input = input.replace(/^(\s*)- (.*)$/gm, function (match,level,content) {
	var len = 2;
	if(level.length > 0) {
		len = parseInt(level.length/4.0) + 2;
	}
	return Array(len).join("-") + ' ' + content;
});

// multi-level numbered list
input = input.replace(/^(\s*)\d. (.*)$/gm, function (match, level, content) {
	var len = 2;
	if (level.length > 1) {
		len = parseInt(level.length / 4) + 2;
	}
	return Array(len).join("#") + ' ' + content;
});

var map = {
	cite: '??',
	del: '-',
	ins: '+',
	sup: '^',
	sub: '~'
};

input = input.replace(new RegExp('<(' + Object.keys(map).join('|') + ')>(.*?)<\/\\1>', 'g'), function (match,from,content) {
	//console.log(from);
	var to = map[from];
	return to + content + to;
});

input = input.replace(/<span style="color:(#[^"]+)">([^]*?)<\/span>/gm, '{color:$1}$2{color}');

input = input.replace(/~~(.*?)~~/g, '-$1-');

// Images without alt
input = input.replace(/!\[\]\(([^)\n\s]+)\)/g, '!$1!');
// Images with alt
input = input.replace(/!\[([^\]\n]+)\]\(([^)\n\s]+)\)/g, '!$2|alt=$1!');

input = input.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '[$1|$2]');
input = input.replace(/<([^>]+)>/g, '[$1]');

// restore extracted sections
for(var i =0; i < replacementsList.length; i++){
	var sub = replacementsList[i];
	input = input.replace(sub["key"], sub["value"]);
}

// Convert header rows of tables by splitting input on lines
lines = input.split(/\r?\n/gm);
lines_to_remove = []
for (var i = 0; i < lines.length; i++) {
	line_content = lines[i];

	if (line_content.match(/\|---/g) != null) {
		lines[i-1] = lines[i-1].replace(/\|/g, "||")
		lines.splice(i, 1)
	}
}

// Join the split lines back
input = ""
for (var i = 0; i < lines.length; i++) {
	input += lines[i] + "\n"
}

app.setClipboard(input)