Added new command 'info' for cryptos

3 files changed, 128 insertions, 3 deletions

diff --git a/api.c b/api.c
index 2fc7ec17c9c8..37c6ad7e6822 100644
--- a/api.c
+++ b/api.c
@@ -1,6 +1,6 @@
 #include "api.h"
 
-String* api_string_init() {
+String* api_string_init(void) {
     String* pString = (String*) malloc(sizeof(String));
     if (pString != NULL) {
         pString->len = 0;
@@ -17,6 +17,29 @@ String* api_string_init() {
     return pString;
 }
 
+Info* api_info_init(void){
+    Info* pInfo = malloc(sizeof(Info));
+    if (pInfo != NULL){
+        pInfo->name = malloc(64);
+        pInfo->symbol = malloc(64);
+        if (pInfo->name == NULL || pInfo->symbol == NULL){
+            fprintf(stderr, "malloc() failed\n");
+            exit(EXIT_FAILURE);
+        }
+        pInfo->price = EMPTY;
+        pInfo->change_1d = EMPTY;
+        pInfo->change_7d = EMPTY;
+        pInfo->change_30d = EMPTY;
+        pInfo->div_yield = EMPTY;
+        pInfo->marketcap = EMPTY;
+        pInfo->volume_1d = EMPTY;
+    } else {
+        fprintf(stderr, "malloc() failed\n");
+        exit(EXIT_FAILURE);
+    }
+    return pInfo;
+}
+
 size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hString) {
     String* pString = hString;
     size_t new_len = pString->len + size * nmemb;
@@ -234,6 +257,58 @@ void json_print_news(Json* jobj) {
     }
 }
 
+void api_print_info(char* ticker_name_string){
+    Info* ticker_info = coinmarketcap_get_info(ticker_name_string);
+    if (ticker_info == NULL){
+        printf("Invalid symbol!\n");
+        return;
+    }
+    if (ticker_info->name != NULL)
+        printf("Name: %s\n", ticker_info->name);
+    if (ticker_info->symbol != NULL)
+        printf("Symbol: %s\n", ticker_info->symbol);
+    if (ticker_info->price != EMPTY)
+        printf("Price: $%lf\n", ticker_info->price);
+    if (ticker_info->change_1d != EMPTY)
+        printf("Percent change 24h: %lf%%\n", ticker_info->change_1d);
+    if (ticker_info->change_7d != EMPTY)
+        printf("Percent change 7d: %lf%%\n", ticker_info->change_7d);
+    if (ticker_info->change_30d != EMPTY)
+        printf("Percent change 30d: %lf%%\n", ticker_info->change_30d);
+    if (ticker_info->div_yield != EMPTY)
+        printf("Dividend yield: %lf%%\n", ticker_info->div_yield);
+    if (ticker_info->marketcap != EMPTY)
+        printf("Market Cap: $%ld\n", ticker_info->marketcap);
+    if (ticker_info->volume_1d != EMPTY)
+        printf("Volume 24h: $%ld\n", ticker_info->volume_1d);
+    api_info_destroy(&ticker_info);
+}
+
+Info* coinmarketcap_get_info(char* ticker_name_string){
+    char coinmarketcap_api_string[64];
+    sprintf(coinmarketcap_api_string, "https://api.coinmarketcap.com/v1/ticker/%s", ticker_name_string);
+    String* pString = api_curl_data(coinmarketcap_api_string, NULL);
+    if (pString->data[0] == '{') { //Invalid symbol
+        api_string_destroy(&pString);
+        return NULL;
+    }
+    Info* ticker_info = api_info_init();
+    Json* jobj = json_tokener_parse(pString->data);
+    Json* data = json_object_array_get_idx(jobj, 0);
+    strcpy(ticker_info->name, json_object_get_string(json_object_object_get(data, "name")));
+    //ticker_info->name = json_object_get_string(json_object_object_get(data, "name"));
+    strcpy(ticker_info->symbol, json_object_get_string(json_object_object_get(data, "symbol")));
+    //ticker_info->symbol = json_object_get_string(json_object_object_get(data, "symbol"));
+    ticker_info->price = strtod(json_object_get_string(json_object_object_get(data, "price_usd")), NULL);
+    ticker_info->change_1d = strtod(json_object_get_string(json_object_object_get(data, "percent_change_24h")), NULL);
+    ticker_info->change_7d = strtod(json_object_get_string(json_object_object_get(data, "percent_change_7d")), NULL);
+    ticker_info->marketcap = strtol(json_object_get_string(json_object_object_get(data, "market_cap_usd")), NULL, 10);
+    ticker_info->volume_1d = strtol(json_object_get_string(json_object_object_get(data, "24h_volume_usd")), NULL, 10);
+    json_object_put(jobj);
+    api_string_destroy(&pString);
+    return ticker_info;
+}
+
 const char* google_shorten_link(char* url_string) {
     char post_string[1024], copy[1024];
     sprintf(post_string, "{\"longUrl\": \"%s\"}", url_string); //Format HTTP POST
@@ -278,4 +353,12 @@ void api_string_destroy(String** phString) {
     free(pString->data);
     free(*phString);
     *phString = NULL;
+}
+
+void api_info_destroy(Info** phInfo) {
+    Info* pInfo = *phInfo;
+    free((void*)pInfo->name);
+    free((void*)pInfo->symbol);
+    free(*phInfo);
+    *phInfo = NULL;
 }
\ No newline at end of file
diff --git a/api.h b/api.h
index 365525756faa..1fab36f297b5 100644
--- a/api.h
+++ b/api.h
@@ -9,6 +9,8 @@
 #ifndef API_H
 #define API_H
 
+#define EMPTY (-999)
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -23,6 +25,18 @@ struct string {
 
 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;
 
 /**
@@ -33,6 +47,12 @@ typedef struct json_object Json;
 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
@@ -96,6 +116,14 @@ void news_print_top_three(char* ticker_name_string);
  */
 void json_print_news(Json* jobj);
 
+void api_print_info(char* ticker_name_string);
+
+/**
+ * Prints info related to the given cryptocurrency
+ * @param ticker_name_string the cryptocurrency's name
+ */
+Info* coinmarketcap_get_info(char* ticker_name_string);
+
 /**
  * Given a url, returns a shorter link using goo.gl
  * @param url_string the link to shorten
@@ -117,4 +145,10 @@ const char* strip_char(char* string, char c);
  */
 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
\ No newline at end of file
diff --git a/main.c b/main.c
index de8d7855f99c..626397fae951 100644
--- a/main.c
+++ b/main.c
@@ -44,11 +44,19 @@ int main(int argc, char* argv[]) {
         portfolio_legacy_convert();
 
         //Encrypt/decrypt
-    else if (strcmp(argv[1], "encrypt") == 0 && argc == 2)
+    else if (strcmp(cmd, "encrypt") == 0 && argc == 2)
         portfolio_encrypt_decrypt(ENCRYPT, fp, NULL);
-    else if (strcmp(argv[1], "decrypt") == 0 && argc == 2)
+    else if (strcmp(cmd, "decrypt") == 0 && argc == 2)
         portfolio_encrypt_decrypt(DECRYPT, fp, NULL);
 
+        // Info
+    else if (strcmp(cmd, "info") == 0 && argc == 3) {
+        char sym[strlen(argv[2]) + 1];
+        strcpy(sym, argv[2]);
+        strtoupper(sym);
+        api_print_info(sym);
+    }
+
         // Check
     else if (strcmp(cmd, "check") == 0) {
         if (argc < 3) {