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/**
* API data is taken from IEX Trading, Morningstar, Coinmarketcap, and News API.
* https://iextrading.com/developer/docs/
* http://www.morningstar.com/
* https://coinmarketcap.com/api/
* https://newsapi.org/docs
*/
#ifndef API_H
#define API_H
#define EMPTY (-999)
#include <stddef.h>
#include <curl/curl.h>
#include <json-c/json_tokener.h>
#include "string-tick.h"
struct info {
char* name; // Name of security (ex. Apple Inc.)
char* symbol; // Symbol of security (ex. AAPL)
double price; // Current price of security in USD (ex. 174.54)
double change_1d, change_7d, change_30d; // Percent change in the past x days (ex. -7.49)
double div_yield; // Percent dividend yield (ex. 1.46)
long marketcap; // Market cap in USD (ex. 890489000000)
long volume_1d; // Volume in shares of security (ex. 33812360)
};
typedef struct info Info;
/**
* Creates and returns an Info object. name and symbol are allocated 64 bytes. the doubles and long are set to EMPTY
* @return Info object
*/
Info* api_info_init(void);
/**
* writefunction for cURL HTTP GET/POST
* stolen from a nice man on stackoverflow
*/
size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hString);
/**
* If post_field is not NULL, performs a HTTP POST with the given parameters. Otherwise, performs a HTTP GET. Response
* data is stored and returned in a String.
* @param url API url to GET/POST
* @param post_field data needed for POST
* @return NULL if no response from server. Otherwise, String containing data.
*/
String* api_curl_data(const char* url, const char* post_field);
/**
* Returns a double* containing the current price and yesterday's price of a stock or cryptocurrency.
* [0] = current intraday price
* [1] = last close price
* [2] = close price 5 trading days previously
* The function will first query IEX. If no response, it will query Morningstar. If no response, it will query
* Coinmarketcap. If Coinmarketcap returns NULL, the function returns NULL.
* 1. IEX -- NASDAQ/NYSE/NYSEARCA
* 2. Morningstar -- MUTF/OTCMKTS
* 3. Coinmarketcap -- CRYPTO
* @param ticker_name_string security symbol or name to get prices of
* @return price data or NULL if invalid symbol
*/
double* api_get_current_price(const char* ticker_name_string);
/**
* Returns current and yesterday's price of a stock with data from IEX.
* Tested for NASDAQ, NYSE, and NYSEARCA listed stocks/ETFs.
* @param ticker_name_string symbol
* @return price data as defined by api_get_current_price or NULL if invalid symbol
*/
double* iex_get_price(const char* ticker_name_string);
/**
* Returns current and yesterday's price of a mutual fund with data from Morningstar
* Tested for MUTF and OTCMKTS listed securities.
* @param ticker_name_string symbol
* @return price data as defined by api_get_current_price or NULL if invalid symbol
*/
double* morningstar_get_price(const char* ticker_name_string);
/**
* Returns current and yesterday's price of a cryptocurrency with data from Coinmarketcap.
* All cryptocurrencies listed on Coinmarketcap will work.
* @param ticker_name_string symbol
* @return price data as defined by api_get_current_price or NULL if invalid symbol
*/
double* coinmarketcap_get_price(const char* ticker_name_string);
/**
* Returns an array of doubles containing the close price each day in the past 5 years
* @param ticker_name_string symbol
* @return double array of close prices
*/
double* api_get_hist_5y(const char* ticker_name_string);
/**
* Returns an array of doubles containing the close price each day in the past 5 years
* @param ticker_name_string symbol of stock or etf
* @return double array of close prices
*/
double* iex_get_hist_5y(const char* ticker_name_string);
/**
* Returns an array of doubles containing the close price each day in the past 5 years
* @param ticker_name_string symbol of mutf/otcmkts
* @return double array of close prices
*/
double* morningstar_get_hist_5y(const char* ticker_name_string);
/**
* Prints the top three news articles by popularity pertaining to the given string, ticker_name_string. Spaces and
* underscores will be url-encoded (replaced by "%20"). News API will be used for data.
* @param ticker_name_string the string to query
*/
void news_print_top_three(const char* ticker_name_string);
/**
* Prints relevant information about up to three articles given a News API JSON formatted response object. Title, source,
* and URL will always be printed. The URL will be shortened by Google's URL-shortener API. If the author and date
* are specified, those will be printed as well.
* @param jobj the JSON array
*/
void json_print_news(const Json* jobj);
/**
* Prints information about the symbol ticker_name_string by calling the function json_print_news.
* @param ticker_name_string
*/
void api_print_info(const char* ticker_name_string);
/**
* Returns a pointer to an Info object containing info pertaining
* to the given symbol with data from IEX.
* @param ticker_name_string stock/etf symbol
* @return Info object
*/
Info* iex_get_info(const char* ticker_name_string);
/**
* Returns a pointer to an Info object containing info pertaining
* to the given symbol with data from Morningstar
* @param ticker_name_string mutf/otc symbol
* @return Info object
*/
Info* morningstar_get_info(const char* ticker_name_string);
/**
* Returns a pointer to an Info object containing info pertaining to the given cryptocurrency from Coinmarketcap.
* @param ticker_name_string the crypto's name
* @return Info object
*/
Info* coinmarketcap_get_info(const char* ticker_name_string);
/**
* Given a url, returns a shorter link using Google's URL-shortener API.
* @param url_string the link to shorten
* @return the shortened link
*/
char* google_shorten_link(const char* url_string);
/**
* Destroys Info object and frees memory. Sets the pointer to the Info to NULL
* @param phInfo the Info to destroy
*/
void api_info_destroy(Info** phInfo);
#endif
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