cronjo/lib/parse-field.js

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/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

/**
 * Returns the value list of crontime expression pin.
 * 
 * @param {String} field The pin name of crontime expression. This is "minutes", "hours", "daysOfMonth", "months", "daysOfWeek".
 * @param {String} value The pin value of crontime expression.
 * 
 * @returns {Array} The value list of crontime expression pin.
 * 
 * @summary Returns the value list of crontime expression pin.
 * 
 * @license Apache-2.0
 */
module.exports = function(field, value) {
    const { maxValue, minValue } = require("./options")
    let stack = []
    if(value === "*") {
        stack = Array.from({ length: maxValue[field] - minValue[field] + 1 }, (_, i) => i + minValue[field])
    } else if(value.includes("/")) {
        let secOpts = value.split("/")
        let min = secOpts[0]
        let max = maxValue[field]
        if(secOpts[0].includes("-")) [min, max] = secOpts[0].split("-")
        else if(secOpts[0] === "*") min = minValue[field]
        for(let i = +min; i <= +max; i += +secOpts[1]) stack.push(i)
    } else if(value.includes("-")) {
        if(value.includes(",")) {
            let secOpts = value.split(",")
            let values = secOpts.filter(secOpt => !secOpt.includes("-")).map(secOpt => +secOpt)
            secOpts.filter(secOpt => secOpt.includes("-")).forEach(secOpt => {
                let [min, max] = secOpt.split("-")
                for(let i = +min; i <= +max; i++) values.push(i)
            })
            stack = values
        } else {
            let secOpts = value.split("-").map(secOpt => +secOpt)
            let min = secOpts[0]
            let max = secOpts.slice(-1)[0]
            for(let i = min; i <= max; i++) stack.push(i)
        }
    } else if(value.includes(",")) {
        stack = value.split(",").map(secOpt => +secOpt)
    } else stack = [+value]

    return [...new Set(stack)].sort((a, b) => a - b)
};