images

Makefile

@@ -1,5 +1,5 @@
 all: src/*.c
-	gcc src/main.c src/json.c src/curl.c -lcurl -lcjson -o isbn -Wall
+	gcc src/main.c src/json.c src/curl.c src/csv.c -lcurl -lcjson -o isbn -Wall
 	mkdir -p build
 	mv isbn build
 clean:

src/csv.c

@@ -0,0 +1,60 @@
+#include <cjson/cJSON.h>
+#include <curl/curl.h> 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "curl.h"
+#include "json.h"
+#include "csv.h"
+
+#define MAX_BUFFER_SIZE 512
+
+int get_next_id()
+{
+	size_t i;
+	char buffer[MAX_BUFFER_SIZE];
+	FILE* csv;
+	char id[MAX_BUFFER_SIZE];
+
+	csv = fopen(FILE_NAME, "r");
+
+	while (fgets(buffer, sizeof(buffer), csv));
+
+	i = 0;
+	while(buffer[i] != ',')
+		i++;
+
+	strncpy(id, buffer, i);
+
+	return atoi(id) + 1;
+}
+
+void write_to_file(book_t* book)
+{
+	FILE* file;
+	int file_exists;
+	int book_id;
+
+	/**
+	 * We want to check if the file exists
+	 * if it doesnt, we create a new one
+	 * otherwise, we write to the existing one
+	 */
+	file_exists = access(FILE_NAME, F_OK);
+	if (0 != file_exists) {
+		file = fopen(FILE_NAME, "w");
+		fprintf(file, "id,isbn,title,authors,imageurl,year of publication,page length\n");
+		book_id = 1;
+	} else {
+		file = fopen(FILE_NAME, "a");
+		book_id = get_next_id();
+	}
+
+	// now we write the information
+	fprintf(file, "%d,\"%s\",\"%s\",\"%s\",\"%s\",%d,%d\n", 
+			book_id, book->isbn, book->title, book->authors, book->image_url, book->year_of_publication, book->page_len);
+
+	fclose(file);
+}

src/csv.h

@@ -0,0 +1,10 @@
+#ifndef CSV_H
+#define CSV_H
+
+#define FILE_NAME "books.csv"
+
+int get_next_id();
+
+void write_to_file(book_t* book);
+
+#endif

src/json.c

@@ -40,6 +40,22 @@ void get_authors(cJSON* bookinfo, char* authors)
 	}
 }
 
+
+void get_image_link(cJSON* bookinfo, book_t* book)
+{
+	int image_id = cJSON_GetObjectItemCaseSensitive(bookinfo, "cover_i")->valueint;
+
+
+	const char* begin = "https://covers.openlibrary.org/b/id/";
+	const char* end = "-L.jpg";
+
+	book->image_url = malloc(sizeof(char) * MAX_BUF_LEN);
+
+	sprintf(book->image_url, "%s%d%s", begin, image_id, end);
+
+
+}
+
 void parse_json(string* s, char* isbn, book_t* book)
 {
 	char authors[MAX_BUF_LEN];
@@ -63,7 +79,7 @@ void parse_json(string* s, char* isbn, book_t* book)
 	book->page_len = cJSON_GetObjectItemCaseSensitive(bookinfo, "number_of_pages_median")->valueint;
 
 	get_authors(bookinfo, authors);
-
+	get_image_link(bookinfo, book);
 	// Need to malloc, because we need to copy authors into the book struct
 	book->authors = (char*) malloc(sizeof(char) * (strlen(authors) + 1));
 	memcpy(book->authors, authors, strlen(authors) + 1);

src/json.h

@@ -7,6 +7,7 @@ typedef struct book_t {
 	char* isbn;
 	char* title;
 	char* authors;
+	char* image_url;
 	int year_of_publication;
 	int page_len;
 } book_t;

src/main.c

@@ -7,8 +7,7 @@
 
 #include "curl.h"
 #include "json.h"
-
-#define FILE_NAME "books.csv"
+#include "csv.h"
 
 #define MAX_BUF_LEN 1024 
 
@@ -33,30 +32,6 @@ void print_book(book_t* book)
 	printf("Page length: %d\n", book->page_len);
 }
 
-void write_to_file(book_t* book)
-{
-	FILE* file;
-	int file_exists;
-
-	/**
-	 * We want to check if the file exists
-	 * if it doesnt, we create a new one
-	 * otherwise, we write to the existing one
-	 */
-	file_exists = access(FILE_NAME, F_OK);
-	if (0 != file_exists) {
-		file = fopen(FILE_NAME, "w");
-		fprintf(file, "isbn,title,authors,year of publication,page length\n");
-	} else {
-		file = fopen(FILE_NAME, "a");
-	}
-
-	// now we write the information
-	fprintf(file, "\"%s\",\"%s\",\"%s\",%d,%d\n", 
-			book->isbn, book->title, book->authors, book->year_of_publication, book->page_len);
-
-	fclose(file);
-}
 
 void do_output(book_t* book, enum book_options output_type)
 {