Get basic info from title

getInfo.js

"use strict";

const charString = "〇一二三四五六七八九零壱弐参肆伍陸質捌玖壹貳參十百千拾佰仟陌阡";

const chars1 = [
    "〇", "一", "二", "三", "四", "五", "六", "七", "八", "九",
    "零", "壱", "弐", "参", "肆", "伍", "陸", "質", "捌", "玖",
    void 0, "壹", "貳", "參"
];

const chars2 = [
    "十", "百", "千",
    "拾", "佰", "仟",
    void 0, "陌", "阡"
];

function escapeRegString(str) {
    return str.replace(/([.*+?^=!:${}()|[\]\/\\])/g, "\\$1");
}

function getCount(str, counts) {
    let reg, match;

    for (const count of counts) {
        reg = new RegExp(`^${count[0]}([\\d０-９]+)${count[1]}`);
        match = str.match(reg);

        if (match !== null) {
            return {
                count: Number.parseInt(match[1].replace(/[０-９]/g, s => String.fromCharCode(s.charCodeAt(0) - 0xFEE0)), 10),
                replaced: str.replace(reg, "").trim()
            };
        }

        reg = new RegExp(`^${count[0]}([${charString}]+)${count[1]}`);
        match = str.match(reg);

        if (match !== null) {
            const chars = match[1].split("");

            let number = 0;
            let temp = 1;

            for (let i = 0; i < chars.length; i++) {
                const char = chars[i];

                if (chars1.includes(char)) {
                    temp = chars1.indexOf(char) % 10;

                    if (i === chars.length - 1) {
                        number += temp;
                    }
                } else {
                    number += Math.pow(10, chars2.indexOf(char) % 3 + 1) * temp;
                    temp = 1;
                }
            }

            return {
                count: number,
                replaced: str.replace(reg, "").trim()
            };
        }
    }

    return null;
}

function getSubtitle(str, brackets) {
    let reg, match;

    for (const bracket of brackets) {
        reg = new RegExp(`^${escapeRegString(bracket[0])}(.*?)${escapeRegString(bracket[1])}`);
        match = str.match(reg);

        if (match !== null) {
            return {
                subtitle: match[1],
                replaced: str.replace(reg, "").trim()
            };
        }
    }

    return null;
}

function getTitle(str, brackets) {
    const reg = new RegExp(`^\\S[^\\s${escapeRegString(brackets.map(bracket => bracket[0]).join(""))}]*`);
    const match = str.match(reg);

    if (match !== null) {
        return {
            title: match[0],
            replaced: str.replace(reg, "").trim()
        };
    }

    return null;
}

function getInfo(str, settings) {
    const result = {
        title: null,
        subtitle: null,
        count: null
    };

    let reg, match, obj;

    str = str.trim();

    for (const replaceString of settings.replaceStrings) {
        reg = RegExp(`${escapeRegString(replaceString)}`, "g");
        match = str.match(reg);

        if (match !== null) {
            str = str.replace(reg, "").trim();
        }
    }

    for (const replaceBracket of settings.replaceBrackets) {
        reg = RegExp(`${escapeRegString(replaceBracket[0])}.*?${escapeRegString(replaceBracket[1])}`, "g");
        match = str.match(reg);

        if (match !== null) {
            str = str.replace(reg, "").trim();
        }
    }

    while (str !== "") {
        if ((obj = getCount(str, settings.counts)) !== null) {
            result.count = obj.count;
            str = obj.replaced;
        } else if ((obj = getSubtitle(str, settings.brackets)) !== null) {
            if (result.title === null) {
                result.title = obj.subtitle;
            } else if (result.subtitle === null) {
                result.subtitle = obj.subtitle;
            } else {
                result.subtitle += `, ${obj.subtitle}`;
            }

            str = obj.replaced;
        } else if ((obj = getTitle(str, settings.brackets)) !== null) {
            if (result.subtitle === null) {
                if (result.count === null) {
                    if (result.title === null) {
                        result.title = obj.title;
                    } else {
                        result.title += ` ${obj.title}`;
                    }
                } else {
                    result.subtitle = obj.title;
                }
            }

            str = obj.replaced;
        } else {
            break;
        }
    }

    return result;
}

function main() {
    const str = process.argv[2];

    const settings = {
        replaceStrings: [
            "アニメイズム",
            "＜アニメ＞",
            "TVアニメ・",
            "TVアニメ",
            "アニメ・",
            "アニメ"
        ],
        replaceBrackets: [
            ["[", "]"],
            ["【", "】"],
            ["＜", "＞"],
            ["（", "）"]
        ],
        brackets: [
            ["「", "」"],
            ["『", "』"]
        ],
        counts: [
            ["第", "話"],
            ["第", "回"],
            ["＃", ""],
            ["♯", ""]
        ]
    };

    console.log(getInfo(str, settings));
}

main();