utils.ts

import moment from 'moment'
import { highlightjs } from 'types'

export function serilization<T extends Record<string, any>>(obj: T): T {
    let newObj: any = {}
    Object.keys(obj).forEach((key) => {
        let value = obj[key]
        if (value !== null) {
            // If array, loop...
            if (Array.isArray(value)) {
                value = value.map((item) => serilization(item))
            }
            // ...if property is date/time, stringify/parse...
            else if (
                typeof value === 'object' &&
                typeof value.getMonth === 'function'
            ) {
                const date = moment(value)
                value = date.format('YYYY-MM-DDTHH:mm:ssZ')
            }
            // ...and if a deep object, loop.
            else if (typeof value === 'object') {
                value = serilization(value)
            }
        }
        newObj[key] = value
    })
    return newObj
}

export const isServer = () => typeof window === 'undefined'

export const getPostHeadingImage = (id: number) => {
    const index = ((id - 1) % 11) + 1
    return `/static/post-heading-${index}.jpg`
}

export function hljsDefineGraphQL(fn: typeof highlightjs) {
    return {
        aliases: ['gql'],
        keywords: {
            keyword:
                'query mutation subscription|10 type interface union scalar fragment|10 enum on ...',
            literal: 'true false null',
        },
        contains: [
            fn.HASH_COMMENT_MODE,
            fn.QUOTE_STRING_MODE,
            fn.NUMBER_MODE,
            {
                className: 'type',
                begin: '[^\\w][A-Z][a-z]',
                end: '\\W',
                excludeEnd: true,
            },
            {
                className: 'literal',
                begin: '[^\\w][A-Z][A-Z]',
                end: '\\W',
                excludeEnd: true,
            },
            {
                className: 'variable',
                begin: '\\$',
                end: '\\W',
                excludeEnd: true,
            },
            {
                className: 'keyword',
                begin: '[.]{2}',
                end: '\\.',
            },
            {
                className: 'meta',
                begin: '@',
                end: '\\W',
                excludeEnd: true,
            },
        ],
        illegal: /([;<']|BEGIN)/,
    }
}