OptiTrainer/server/index.js

const micro = require('micro');
const queryString = require('querystring');
const Database = require('better-sqlite3');

module.exports = (req, res) => {
    console.log(req.method, req.url);
    res.setHeader("Access-Control-Allow-Origin","*");
    //console.log(res);
    if (req.method === "GET") {
        console.log("Get Request coming in");
        let qsAttr;
        let func=req.url;
        if (req.url.indexOf("?") >=0){
            func=req.url.substring(0,req.url.indexOf("?"))
            qsAttr=queryString.parse(req.url.substring(req.url.indexOf("?")+1));
        } 
        console.log(func,qsAttr);
        if (func === "/getCombinations") {
            console.log("Request for combinations");
            const db = new Database('./quoteDBs/consolidated.sqlite3', { verbose: console.log });
            const stmt = db.prepare("SELECT distinct Symbol,date(TimeStamp,'localtime') Date ,time(TimeStamp,'localtime') Time FROM OptionQuotes");
            let allDates  = stmt.all();
            //console.log(JSON.stringify(allDates)); 
            db.close(); 
            micro.send(res,200,allDates);
        }
        if (func === "/getSymbols") {
            console.log("Request for Symbols");
            const db = new Database('./quoteDBs/consolidated.sqlite3', { verbose: console.log });
            const stmt = db.prepare("SELECT distinct Symbol FROM OptionQuotes order by 1");
            let allDates  = stmt.all();
            //console.log(JSON.stringify(allDates)); 
            db.close(); 
            micro.send(res,200,allDates);
        }
        if (func === "/getDates") {
            console.log("Request for Dates");
            const db = new Database('./quoteDBs/consolidated.sqlite3', { verbose: console.log });
            const stmt = db.prepare("SELECT distinct date(TimeStamp,'localtime') Date FROM OptionQuotes order by 1");
            let allDates  = stmt.all();
            //console.log(JSON.stringify(allDates)); 
            db.close(); 
            micro.send(res,200,allDates);
        }
        if (func === "/getTimes") {
            console.log("Request for Times");
            const db = new Database('./quoteDBs/consolidated.sqlite3', { verbose: console.log });
            let sql = "SELECT distinct time(TimeStamp,'localtime') Time FROM OptionQuotes where 1=1"
            if (qsAttr.Symbol) {
                sql +=" and Symbol='" + qsAttr.Symbol+ "'";
            }
            if (qsAttr.Date){
                sql +=" and date(TimeStamp,'localtime')='" + qsAttr.Date+ "'";
            }
            sql+=" order by 1";
            const stmt = db.prepare(sql);
            let allDates  = stmt.all();
            //console.log(JSON.stringify(allDates)); 
            db.close(); 
            micro.send(res,200,allDates);
        }
        if (func === "/getOptionChain") {
            console.log("Request for OptionChain");
            const db = new Database('./quoteDBs/consolidated.sqlite3', { verbose: console.log });
            let sql = "SELECT Data FROM OptionQuotes where 1=1"
            if (qsAttr.Symbol) {
                sql +=" and Symbol='" + qsAttr.Symbol+ "'"
            }
            if (qsAttr.Date){
                sql +=" and date(TimeStamp,'localtime')='" + qsAttr.Date+ "'";
            }
            if (qsAttr.Time){
                sql +=" and time(TimeStamp,'localtime')='" + qsAttr.Time+ "'";
            }
            
            const stmt = db.prepare(sql);
            let allDates  = stmt.all();
            //console.log(JSON.stringify(allDates)); 
            db.close(); 
            micro.send(res,200,allDates);
        }

    }
}