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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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <curl/curl.h>
#include <json-c/json_tokener.h>
struct string {
char* data;
size_t len;
};
typedef struct string String;
struct info {
char* name;
char* symbol;
double price;
double change_1d, change_7d, change_30d;
double div_yield;
long marketcap;
long volume_1d;
};
typedef struct info Info;
typedef struct json_object Json;
/**
* Creates and returns a STRING
* object with size 1 and no data
* @return STRING object
*/
String* api_string_init(void);
/**
* Creates and returns an Info object
* @return Info object
*/
Info* api_info_init(void);
/**
* GETs data from API server and returns it in a String
* @param url API url to GET
* @param post_field data needed for POST
* @return NULL if no response from server. Otherwise, String containing data.
*/
String* api_curl_data(char* url, 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
* Order:
* 1. IEX -- NASDAQ/NYSE/NYSEARCA
* 2. Morningstar -- MUTF/OTCMKTS
* 3. Coinmarketcap -- CRYPTO
* @param ticker_name_string symbol
* @return price data or NULL if invalid symbol
*/
double* api_get_current_price(const 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 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
* @param offset number of days ago to get price of (0 = today)
* @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);
/**
* Prints top three news articles in the past week based on the given string
* @param ticker_name_string the string
*/
void news_print_top_three(const char* ticker_name_string);
/**
* Given a JSON formatted string, print title, source, author, and url of articles
* @param data the json formatted data
*/
void json_print_news(Json* jobj);
void api_print_info(const char* ticker_name_string);
/**
* Prints info related to the given cryptocurrency
* @param ticker_name_string the cryptocurrency's name
*/
Info* coinmarketcap_get_info(const char* ticker_name_string);
/**
* Given a url, returns a shorter link using goo.gl
* @param url_string the link to shorten
* @return the shortened link
*/
char* google_shorten_link(const char* url_string);
/**
* Returns a string stripped of the given char
* @param string the string to strip the char from
* @param c the char to strip
* @return the stripped string
*/
char* strip_char(const char* string, char c);
/**
* Destroys String object and frees memory
* @param phString the String to destroy
*/
void api_string_destroy(String** phString);
/**
* Destroys Info object and frees memory
* @param phInfo the Info to destroy
*/
void api_info_destroy(Info** phString);
#endif
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