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throw new SyntaxError(`${field.name}: missing integer at character ${i}`)\n }\n return Number.parseInt(digits.join(''), 10)\n }\n\n const parseValue = () => {\n let value\n\n const { aliasesRegExp } = field\n if (aliasesRegExp === undefined || isDigit(pattern[i])) {\n value = parseInteger()\n const { post } = field\n if (post !== undefined) {\n value = post(value)\n }\n } else {\n aliasesRegExp.lastIndex = i\n const matches = aliasesRegExp.exec(pattern)\n if (matches === null) {\n throw new SyntaxError(\n `${field.name}: missing alias or integer at character ${i}`\n )\n }\n const [alias] = matches\n i += alias.length\n value = field.aliases[alias]\n }\n\n const { range } = field\n if (value < range[0] || value > range[1]) {\n throw new SyntaxError(\n `${field.name}: ${value} is not between ${range[0]} and ${range[1]}`\n )\n }\n return value\n }\n\n const parseRange = () => {\n let end, start, step\n if (match('*')) {\n if (!match('/')) {\n return\n }\n ;[start, end] = field.range\n step = parseInteger()\n } else {\n start = parseValue()\n if (!match('-')) {\n values.add(start)\n return\n }\n end = parseValue()\n step = match('/') ? parseInteger() : 1\n }\n\n for (let i = start; i <= end; i += step) {\n values.add(i)\n }\n }\n\n const parseSequence = () => {\n do {\n parseRange()\n } while (match(','))\n }\n\n const parse = p => {\n {\n const schedule = presets[p]\n if (schedule !== undefined) {\n return typeof schedule === 'string'\n ? (presets[p] = parse(schedule))\n : schedule\n }\n }\n\n try {\n i = 0\n n = p.length\n pattern = p\n schedule = {}\n\n for (let j = 0; j < m; ++j) {\n consumeWhitespaces()\n\n field = fields[j]\n values = new Set()\n parseSequence()\n if (values.size !== 0) {\n schedule[field.name] = Array.from(values).sort(compareNumbers)\n }\n }\n\n consumeWhitespaces()\n if (i !== n) {\n throw new SyntaxError(\n `unexpected character at offset ${i}, expected end`\n )\n }\n\n return schedule\n } finally {\n field = pattern = schedule = values = undefined\n }\n }\n\n return parse\n}\n\nexport default createParser({\n fields: [\n {\n name: 'minute',\n range: [0, 59],\n },\n {\n name: 'hour',\n range: [0, 23],\n },\n {\n name: 'dayOfMonth',\n range: [1, 31],\n },\n {\n aliases: 'jan feb mar apr may jun jul aug sep oct nov dec'.split(' '),\n name: 'month',\n range: [0, 11],\n },\n {\n aliases: 'sun mon tue wen thu fri sat'.split(' '),\n name: 'dayOfWeek',\n post: value => (value === 7 ? 0 : value),\n range: [0, 6],\n },\n ],\n presets: {\n '@annually': '0 0 1 jan *',\n '@daily': '0 0 * * *',\n '@hourly': '0 * * * *',\n '@monthly': '0 0 1 * *',\n '@weekly': '0 0 * * sun',\n '@yearly': '0 0 1 jan *',\n },\n})\n"],"file":"parse.js"} |