50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
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export class ArgParser {
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constructor(opts) {
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this.examples = opts.examples ?? [];
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this.arguments = opts.args ?? [];
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this.description = opts.desc;
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}
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parse(args) {
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const req = this.arguments.filter(a => !a.optional);
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const queue = [...args];
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const parsed = {};
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for(let i = 0; i < queue.length; i++) {
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if(queue[i][0] != '-') continue;
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let value = null, parse = queue[i].slice(queue[i][1] == '-' ? 2 : 1);
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if(parse.indexOf('=')) {
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const split = parse.split('=');
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parse = split[0];
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value = split[1];
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}
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let arg = this.arguments.find(a => a.key == parse) ?? this.arguments.find(a => a.alias == parse);
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if(!arg) continue;
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if(!value) value = arg.type && arg.type != 'bool' ? queue.splice(i + 1, 1)[0] : true;
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parsed[arg.key] = value;
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queue.splice(i, 1);
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}
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req.forEach((a, i) => parsed[a.key] = queue[i]);
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queue.splice(0, req.length);
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if(queue.length) parsed.extra = queue;
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return parsed;
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}
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help(msg) {
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let message = '\n\n';
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message += msg ? msg : this.description;
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if(this.examples.length) message += '\n\nUsage:\t' + this.examples.join('\n\t');
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const required = this.arguments.filter(a => !a.optional);
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if(required.length) message += '\n\n\t' + required.map(a => {
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const padding = 3 - ~~(a.key.length / 8);
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return `${a.key}${Array(padding).fill('\t').join('')} ${a.desc}`;
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}).join('\n\t');
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const optional = this.arguments.filter(a => a.optional);
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if(optional.length) message += '\n\nOptions:\n\t' + optional.map(a => {
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const flgs = `${a.alias ? `-${a.alias} ` : ''}--${a.key}${a.type && a.type != 'bool' ? `=${a.type}` : ''}`;
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const padding = 3 - ~~(flgs.length / 8);
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return `${flgs}${Array(padding).fill('\t').join('')} ${a.desc}`;
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}).join('\n\t');
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return `${message}\n\n`;
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}
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}
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