Adds an endpoint to add books

- Changed the release version for ISBN-lookup because it was out of date
  and broke a feature
- Added an endpoint for adding books with robust error handling

api/isbn-interaction.cpp

@@ -1,9 +1,10 @@
-#include <cinttypes>
 #include <string>
 #include <vector>
 #include <fstream>
 
+#include <sys/wait.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #include "isbn-interaction.h"
 #include "csv.h"
@@ -14,6 +15,7 @@ std::string book_vec_to_json(std::vector<std::string> headers, std::vector<std::
 {
 	int i;
 	std::string out = "{";
+
 	for (i = 0; i < book.size(); i++) {
 		out += "\"" + headers[i] + "\":";
 		out += "\"" + book[i] + "\",";
@@ -30,6 +32,7 @@ std::string get_all_books()
 	std::vector<std::string> book_vec;
 	std::vector<std::string> header_vec;
 
+
 	file.open(BOOK_FILENAME);
 
 	if (!file.good()) {
@@ -45,25 +48,42 @@ std::string get_all_books()
 	total_lines = "{";	
 	while (std::getline(file, line)) {
 		book_vec = get_csv_as_vector(line);
+	
 		total_lines += book_vec_to_json(header_vec, book_vec) + ",";
 	}
 
+
 	return total_lines + "}";
 }
 
-void add_new_book(std::string isbn)
+std::string add_new_book(std::string isbn)
 {
 	pid_t pid;
-
+	int exec_status;
 
 	std::string program_name = "./isbn";
 	std::string write = "w";
-	const char* args[] = {program_name.c_str(), isbn.c_str(), write.c_str()};
+	char* args[] = {(char*) program_name.c_str(), (char*) isbn.c_str(), (char*) write.c_str(), NULL};
 
 	pid = fork();	
-	if (0 == pid) { // 
+	if (0 == pid) { 
-		// this is the child
+		execvp(args[0], args);
-	}
+		exit(EXIT_SUCCESS);
+	} else if (pid < 0) {
+		perror("Adding book, failed to fork");	
+		return "Book lookup failed!";
+	} else {
+		wait(&exec_status);
 
-	//TODO execvp the args blah blah
+		if (!WIFEXITED(exec_status)) {
+			perror("ISBN exited unexpectedly!");
+			return "Book lookup failed!";
+		}
+
+		if (0 != WEXITSTATUS(exec_status)) {
+			return "Invalid ISBN submitted!";
+		}
+
+		return "Book added successfully!";
+	}
 }

api/isbn-interaction.h

@@ -17,6 +17,6 @@ std::string book_vec_to_json(std::vector<std::string> headers, std::vector<std::
  */
 std::string get_all_books();
 
-void add_new_book(std::string isbn);
+std::string add_new_book(std::string isbn);
 
 #endif

api/main.cpp

@@ -1,8 +1,8 @@
 #include <crow.h>
 #include <crow/app.h>
-
 #include <fstream>
 
+
 #include "csv.h"
 #include "isbn-interaction.h"
 
@@ -23,6 +23,15 @@ int main()
 		return crow::response(get_all_books());
 	});
 
+	CROW_ROUTE(app, "/add/<string>")
+		([](std::string isbn)
+		 {
+		 	return crow::response(add_new_book(isbn));
+		 });
+
+
+
+
 	app.port(18080).run();
 
 }

compile.sh

@@ -3,7 +3,7 @@ make
 
 cd bin/
 
-wget https://github.com/SuperNovaa41/isbn-lookup/releases/download/release/isbn
+wget https://github.com/SuperNovaa41/isbn-lookup/releases/download/0.0.2/isbn
 chmod +x isbn
 
 cd ..