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converts ISBN call to its own function

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adds an enum for fork exit codes
adds removing book
This commit is contained in:
SuperNovaa41 2024-01-24 18:37:54 -05:00
parent abdd1ed9da
commit fb443c4310
2 changed files with 66 additions and 20 deletions
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75
api/isbn-interaction.cpp
View File

@ -58,39 +58,74 @@ std::string get_all_books()
std::string remove_book(int id)
{
pid_t pid;
int exec_status;
enum ISBN_EXIT_CODE exec_code;
std::string program_name = "./isbn";
std::string remove = "remove";
std::string str_id = std::to_string(id);
char* args[] = {(char*) program_name.c_str(), (char*) remove.c_str(), (char*) str_id.c_str(), NULL};
switch (exec_code) {
case FORK_FAILED:
perror("removing book, failed to fork");
return "Couldn't remove book!";
case PROGRAM_EXIT_UNEXPECTED:
perror("ISBN exited unexpectedly");
return "Couldn't remove book!";
case PROGRAM_FAIL:
return "There was an error in removing the book!";
case PROGRAM_SUCCESS:
return "Successfully removed book!";
default:
return "Unknown error in removing book!";
}
}
std::string add_new_book(std::string isbn)
{
enum ISBN_EXIT_CODE exec_code;
std::string program_name = "./isbn";
char* args[] = {(char*) program_name.c_str(), (char*) isbn.c_str(), NULL};
exec_code = run_isbn_program(args);
switch (exec_code) {
case FORK_FAILED:
perror("Adding book, failed to fork");
return "Book lookup failed!";
case PROGRAM_EXIT_UNEXPECTED:
perror("ISBN exited unexpectedly");
return "Book lookup failed!";
case PROGRAM_FAIL:
return "Invalid ISBN submitted!";
case PROGRAM_SUCCESS:
return "Book added succesfully!";
default:
return "Unknown error in adding book!";
}
}
enum ISBN_EXIT_CODE run_isbn_program(char* args[])
{
pid_t pid;
int exec_status;
std::string program_name = "./isbn";
char* args[] = {(char*) program_name.c_str(), (char*) isbn.c_str(), NULL};
pid = fork();
if (0 == pid) {
pid = fork();
if (0 == pid) {
execvp(args[0], args);
exit(EXIT_SUCCESS);
} else if (pid < 0) {
perror("Adding book, failed to fork");
return "Book lookup failed!";
return FORK_FAILED;
} else {
wait(&exec_status);
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!";
if (!WIFEXITED(exec_status))
return PROGRAM_EXIT_UNEXPECTED;
if (0 != WEXITSTATUS(exec_status))
return PROGRAM_FAIL;
return PROGRAM_SUCCESS;
}
}

11
api/isbn-interaction.h
View File

@ -1,6 +1,14 @@
#ifndef ISBN_INTERACTION_H
#define ISBN_INTERACTION_H
enum ISBN_EXIT_CODE {
FORK_FAILED,
PROGRAM_EXIT_UNEXPECTED,
PROGRAM_SUCCESS,
PROGRAM_FAIL
};
/**
* std::string book_vec_to_json
* std::vector<std::string> headers - Vector of strings that contain the type information of the data
@ -19,4 +27,7 @@ std::string get_all_books();
std::string add_new_book(std::string isbn);
enum ISBN_EXIT_CODE run_isbn_program(char* args[]);
#endif