import { Spec, parse, Problem } from "comment-parser"

export const getTags = (source?: string): Spec[] => {
    if (!source) return []
    const blocks = parse(source)
    const tags = blocks.reduce(
        (acc, block) => acc.concat(block.tags),
        [] as Spec[]
    );
    return tags
}

export const getErrors = (source?: string): Error | undefined => {
    if (!source) return undefined
    const blocks = parse(source)
    const probs = blocks.reduce(
        (acc, block) => acc.concat(block.problems),
        [] as Problem[]
    );
    if (!probs.length) return undefined
    const errors = probs.map(prob => `[${prob.code}] on line ${prob.line}: ${prob.message}`)
    const error = new Error(`The following error(s) occurred while parsing JSDOC: \n${errors.join('\n')}`)
    return error
}