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path: root/converter.js
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const builder = require('xmlbuilder');

const convert = (jsonStr) => {
    const inputData = JSON.parse(jsonStr);

    const printableNumber = n => (n > 0) ? "+" + n : n;

    const capitalize = (s) => {
        if (typeof s !== 'string') return ''
        return s.charAt(0).toUpperCase() + s.slice(1)
    };

    const ordinalize = (i) => {
        const j = i % 10,
            k = i % 100;
        if (j == 1 && k != 11) {
            return i + "st";
        }
        if (j == 2 && k != 12) {
            return i + "nd";
        }
        if (j == 3 && k != 13) {
            return i + "rd";
        }
        return i + "th";
    };

    const replaceSpecialValues = (text) => {
        text = text.replace(/\{@hit (\d+?)\}/g, (match, p1) => printableNumber(p1))
        text = text.replace(/\{@h\}(\d+?)/g, '$1');
        text = text.replace(/\{@damage (.*?)\}/g, '$1');
        text = text.replace(/\{@dc (\d+?)\}/g, 'DC $1');
        text = text.replace(/\{@condition (\w+)\}/g, '$1');
        text = text.replace(/\{@skill (\w+)\}/g, '$1');
        text = text.replace(/\{@dice (.+?)\}/g, '$1');
        text = text.replace(/\{@spell (.+?)\}/g, (match, p1) => capitalize(p1));
        text = text.replace(/\{@creature (.+?)\}/g, (match, p1) => capitalize(p1));
        text = text.replace(/\{@atk (.+?)\}/g, (match, p1) => {
            p1 = p1.replace(/mw/g, 'Melee Weapon Attack');
            p1 = p1.replace(/ms/g, 'Melee Spell Attack');
            p1 = p1.replace(/rw/g, 'Ranged Weapon Attack');
            p1 = p1.replace(/rs/g, 'Ranged Spell Attack');
            p1 = p1.replace(/\,\s*/g, ' or ');
            return `${p1}:`;
        });
        return text;
    };

    const xml = builder.create('root', { encoding: 'utf-8' })
        .ele('compendium', { version: '5' })

    const parseToXML = (obj) => {
        const monster = xml.ele('monster');

        monster.ele('name', obj.name)
        monster.ele('size', obj.size)
        monster.ele('type', typeof obj.type === 'object' ? obj.type.type : obj.type)
        monster.ele('source', obj.source)
        monster.ele('alignment', obj.alignment && obj.alignment.length ? obj.alignment.join('') : null)
        monster.ele('ac', obj.ac && obj.ac.length ? obj.ac[0].ac : null)
        monster.ele('hp', `${obj.hp.average} (${obj.hp.formula})`)
        monster.ele('cr', obj.cr)
        monster.ele('passive', obj.passive)
        monster.ele('str', obj.str)
        monster.ele('dex', obj.dex)
        monster.ele('con', obj.con)
        monster.ele('int', obj.int)
        monster.ele('wis', obj.wis)
        monster.ele('cha', obj.cha)
        monster.ele('languages', obj.languages && obj.languages.length
            ? obj.languages.join(', ')
            : null
        );
        monster.ele('senses', obj.senses && obj.senses.length
            ? obj.senses.join(', ')
            : null
        );
        monster.ele('immune', obj.immune && obj.immune.length && obj.immune.map((item) => {
            if (typeof item === 'string') {
                return item;
            } else {
                let res = '';
                if (item.preNote) {
                    res += item.preNote;
                }
                if (item.immune) {
                    res += item.immune.join(', ');
                }
                if (item.postNote) {
                    res += item.postNote;
                }
                return res;
            }
        }).join(', '));

        const speedTypes = ['walk', 'burrow', 'climb', 'fly', 'swim'];
        monster.ele('speed', obj.speed && speedTypes.map((key) => {
            const value = obj.speed[key];
            const type = key === 'walk' ? '' : key;
            if (typeof value === 'object') {
                const num = value.number;
                const cond = value.condition || '';
                return `${type} ${num} ft. ${cond}`.trim();
            } else if (!!value) {
                const num = obj.speed[key];
                return `${type} ${num} ft.`;
            } else {
                return undefined;
            }
        }).filter(a => !!a).join(', ').trim());

        monster.ele('save', obj.save && Object.keys(obj.save).map((key) => {
            return `${key} ${obj.save[key]}`;
        }).join(', '));

        monster.ele('skill', obj.skill && Object.keys(obj.skill).map((key) => {
            return `${key} ${obj.skill[key]}`;
        }).join(', '));

        obj.trait && obj.trait.forEach((trait) => {
            const e = monster.ele('trait');
            e.ele('name', trait.name);

            trait.entries.forEach((entry) => {
                const text = replaceSpecialValues(entry);
                e.ele('text', text);
            });
        });

        obj.spellcasting && obj.spellcasting.forEach((spellcasting) => {
            const e = monster.ele('trait');
            e.ele('name', spellcasting.name);
            spellcasting.headerEntries && spellcasting.headerEntries.length && spellcasting.headerEntries.forEach((header) => {
                e.ele('text', replaceSpecialValues(header));
            });

            spellcasting.spells && Object.keys(spellcasting.spells).forEach((level) => {
                const spell = spellcasting.spells[level];
                const slots = spell.slots;
                const lst = spell.spells;

                const levelNum = parseInt(level, 10);
                const ordinal = ordinalize(levelNum);

                let pre = levelNum !== 0 ? ordinal + ' level' : 'Cantrips';
                pre += slots ? ` (${slots} slot${slots > 0 ? 's' : ''})` : '';
                pre = pre.trim();
                const text = `${pre}: ${lst.join(', ')}`;
                e.ele('text', replaceSpecialValues(text));
            });

            if (spellcasting.will) {
                const pre = 'At will'
                const lst = spellcasting.will;

                const text = `${pre}: ${lst.join(', ')}`;
                e.ele('text', replaceSpecialValues(text));
            }

            spellcasting.daily && Object.keys(spellcasting.daily).forEach((count) => {
                const lst = spellcasting.daily[count];

                let pre = `• ${count}/day`;
                const text = `${pre}: ${lst.join(', ')}`;
                e.ele('text', replaceSpecialValues(text));
            });
        });

        obj.legendary && obj.legendary.forEach((legendary) => {
            const e = monster.ele('legendary');
            e.ele('name', legendary.name);

            legendary.entries.forEach((entry) => {
                const text = replaceSpecialValues(entry);
                e.ele('text', text);
            });
        });

        obj.action && obj.action.forEach((action) => {
            const e = monster.ele('action');
            e.ele('name', action.name);

            action.entries.forEach((entry) => {
                const text = replaceSpecialValues(entry);
                e.ele('text', text);
            });
        })
    }

    const processInputData = () => {
        if (inputData.length) { // array
            inputData.forEach((obj) => {
                parseToXML(obj);
            });
        } else if (inputData.monster) { // .monster is an array
            inputData.monster.forEach((obj) => {
                parseToXML(obj);
            });
        } else {
            parseToXML(inputData);
        }
    }

    processInputData();

    xml.end({
        pretty: true,
        newline: '\n',
    });

    return xml.toString();
};

module.exports = {
    convert,
};