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/**
* API data is taken from IEX Trading and Alpha Vantage
* https://iextrading.com/developer/docs/
* https://www.alphavantage.co/documentation/
*/
#ifndef IEX_H
#define IEX_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include <stddef.h>
struct string {
char* data;
size_t len;
};
typedef struct string String;
/**
* Creates and returns a STRING
* object with size 1 and no data
* @return STRING object
*/
String* api_string_init(void);
/**
* GETs data from API server and returns it in a String
* @param url API url to GET
* @return NULL if no response from server. Otherwise, String containing data.
*/
String* api_curl_data(char* url);
/**
* Returns current price of a stock
* @param ticker_name_string symbol
* @return current price of stock
*/
double api_get_current_price(char* ticker_name_string);
/**
* writefunction for cURL HTTP GET
* stolen from a nice man on stackoverflow
*/
size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hString);
/**
* Returns current price of a stock with data from IEX.
* Tested for NASDAQ, NYSE, and NYSEARCA listed stocks/ETFs.
* Fast -- should take less than one second per call
* @param ticker_name_string symbol
* @return current price of stock
*/
double iex_get_current_price(char* ticker_name_string);
/**
* Returns current price of a stock.
* If the symbol is not on IEX, Alpha Vantage will be used
* Tested for MUTF and OTCMKTS listed securities.
* Dreadfully slow -- may take up to ten seconds per call
* @param ticker_name_string symbol
* @return current price of stock
*/
double alphavantage_get_current_price(char* ticker_name_string);
double coinmarketcap_get_current_price(char* ticker_name_string);
/**
* Destroys STRING object and frees memory
* @param phString the String to destroy
*/
void api_string_destroy(String** phString);
#endif
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