113 lines
2.2 KiB
C
113 lines
2.2 KiB
C
#include <curl/curl.h>
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#include <cjson/cJSON.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "curl.h"
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#include "json.h"
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#include "csv.h"
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#define MAX_BUF_LEN 1024
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/**
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* TODO: we need to check the csv file for duplicates
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* TODO: assign an ID to each book
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* TODO: allow us to remove a book from the csv and update the ids
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*/
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enum book_options {
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PRINT_TO_STDIN,
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WRITE_TO_FILE
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};
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void print_book(book_t* book)
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{
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printf("ISBN: %s\n", book->isbn);
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printf("Title: %s\n", book->title);
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printf("Author(s): %s\n", book->authors);
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printf("(First) Year of Publication: %d\n", book->year_of_publication);
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printf("Page length: %d\n", book->page_len);
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}
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void do_output(book_t* book, enum book_options output_type)
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{
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if (WRITE_TO_FILE == output_type) {
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write_to_file(book);
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return;
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}
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print_book(book);
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}
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int main(int argc, char* argv[])
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{
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// want to hold a max of 14 so we can hold up to ISBN13s
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char isbn_buf[14];
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char options[2];
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CURLcode res;
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book_t new_book;
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enum book_options output_type;
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if (3 != argc) {
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printf("Usage: isbn [isbn] [options]\n");
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return EXIT_FAILURE;
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}
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size_t input_len = strlen(argv[1]);
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if (!(13 == input_len || 10 == input_len)) {
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fprintf(stderr, "Invalid ISBN submitted!\n");
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return EXIT_FAILURE;
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}
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// We must initialize cURL
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curl_global_init(CURL_GLOBAL_ALL);
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// Grab the ISBN from argv
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memcpy(isbn_buf, argv[1], 14);
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// Grab the formatting options from argv
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memcpy(options, argv[2], 2);
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switch(options[0]) {
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case 'w':
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output_type = WRITE_TO_FILE;
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break;
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case 'r':
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output_type = PRINT_TO_STDIN;
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break;
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default:
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fprintf(stderr, "Invalid option provided!\n");
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return EXIT_FAILURE;
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}
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// Setup the output string
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string get_output;
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init_string(&get_output);
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// Perform the get request
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res = perform_book_get(isbn_buf, &get_output);
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if (0 != res) {
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fprintf(stderr, "Failed to perform the get request!\n");
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return EXIT_FAILURE;
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}
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// Now we want to parse the JSON input
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parse_json(&get_output, isbn_buf, &new_book);
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// We need to free this string
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free(get_output.buf);
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// NOW we either print or save the book
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do_output(&new_book, output_type);
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// Need to tree this string
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free(new_book.authors);
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return 0;
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}
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