siimee/frontend/src/utils/survey.js

import { Survey } from '../entities'
import { fetchQuestions } from '../services'

class SurveyFactory {
    constructor(responses) {
        this.responsesByCategory = responses
        this.questionsFromDb = []
    }
    _setSteps(langFile) {
        const stepsToProcess = [...Object.values(langFile) ]
        const seenIds = []
        const stepsInCommon = stepsToProcess.map(step => {
            // Match question to step
            const match = this.questionsFromDb.filter(q => q.response_key_prompt == step)[0]
            if(match) { seenIds.push(match.response_key_id) }
            return {
                response_key_id: match ? match.response_key_id: null,
                response_key_category: match ? match.response_key_category: 'profile',
                response_key_prompt: match ? match.response_key_prompt: step,
                response_key_description: match ? match.response_key_description: null,
                responses: this.responsesByCategory[step] ? this.responsesByCategory[step] : [] 
            }
        })
        const unseen = this.questionsFromDb.filter(q => !seenIds.includes(q.response_key_id))
        return [...stepsInCommon, ...unseen]
    }
    async getQuestions() {
        try {
            this.questionsFromDb = await fetchQuestions()
            return this.questionsFromDb
        } catch(err) {
            console.error(err)
        }
    }
    async createSurvey(langFile, roleTree) {
        if(!this.questionsFromDb.length) {
            const res = await this.getQuestions()
            console.warn(`Attempted to create a survey before getting questions: retrieved ${res.length} questions`)
        }
        const steps = this._setSteps(langFile)
        return new Survey(steps, roleTree)
    }
}

export { SurveyFactory }