const { app, globalConfig, fs } = require("../index.js") // Get globals from index

var timeSinceLastQuery = Date.now()-10000
var cachedResult = {}

app.get("/blogposts", (rreq, rres) => {

    if (Date.now() < timeSinceLastQuery+10000) { // if it has been <10 seconds since last request
        

        if (rreq.query.format === "html") { // if ?format=html then send HTML
            rres.send(cachedResult.asHtml)
        } else { // otherwise send json
            rres.send(cachedResult.asJson) 
        }
        
    } else {
        timeSinceLastQuery = Date.now()
        cachedResult = parseFiles()
        

        if (rreq.query.format === "html") { // if ?format=html then send HTML
            rres.send(cachedResult.asHtml)
        } else { // otherwise send json
            rres.send(cachedResult.asJson) 
        }
    }

})

function parseFiles() {
    let files = fs.readdirSync(globalConfig.blog.postsDirectory)
    let result = {
        asJson: [],
        asHtml: ""
    }

    for (x in files) {
        if (files[x].endsWith(".html") === false) { break } // If file/dir is not .html then ignore

        let date = files[x].split("-")[0]
        if (date < 10000000 || date > 99999999) { break } // If date does not fit ISO8601 format then ignore

        date = date.replace(/.{2}/g,"$&-").replace("-","").slice(0,-1) // Insert a dash every 2 characters, remove the first dash, remove the last character

        let name = files[x].slice(9).replace(/-/g," ").replace(".html","") // Strip Date, replace seperator with space & remove file extension

        result.asJson.unshift({ "date": date, "name": name, "path": `${globalConfig.blog.postsDirUrl}/${files[x]}`}) // Add to asJson array in the result
        result.asHtml = `<span>${date} <a href="${globalConfig.blog.postsDirUrl}/${files[x]}">${name}</a></span>`+result.asHtml
    }

    return result
}

module.exports = {app}