FlippyPass/project/backend/manager.c

// Header
#include "manager.h"

// Functions - Private
char** split_string(const char* str, char delimiter, int* count) {
    // Calculate how many substrings will be created
    int i, numSubstrings = 1;
    for (i = 0; str[i] != '\0'; i++) {
        if (str[i] == delimiter) {
            numSubstrings++;
        }
    }

    // Allocate memory for the array of strings
    char** result = malloc(numSubstrings * sizeof(char*));
    *count = numSubstrings;

    // Split the string
    int start = 0, substringIndex = 0;
    for (i = 0; str[i] != '\0'; i++) {
        if (str[i] == delimiter) {
            int length = i - start;
            result[substringIndex] = malloc((length + 1) * sizeof(char));
            strncpy(result[substringIndex], str + start, length);
            result[substringIndex][length] = '\0';
            start = i + 1;
            substringIndex++;
        }
    }
    // Add the last substring
    int length = i - start;
    result[substringIndex] = malloc((length + 1) * sizeof(char));
    strncpy(result[substringIndex], str + start, length);
    result[substringIndex][length] = '\0';

    return result;
}
void string_append(char* first, const char* second) {
    // Get to the end of string 1
    while (*first) {
        ++first;
    }
    
    // Copying Strings
    while (*second) {
        *first++ = *second++;
    }
}
void manager_loadnames(Manager* manager){
    // Loading the names of all passwords
    char* data = store_load("Data");

    // Do we not have any passwords?
    if (!data) {
        // DEBUG
        FURI_LOG_D(TAG, "No passwords found.");

        // Creating names
        manager->names = malloc(sizeof(char*));

        // Returning
        return;
    }

    // Splitting string
    int count = 0;
    char** split = split_string(data, '|', &count);

    // Freeing data
    free(data);

    // Passwords
    /* 
        Doing some risky bitshifting in order to divide by 4 
        This little ARMv7 processor would hate division
    */
    int num_of_passwords = count >> 2;

    // Allocating memory for names array
    manager->names = malloc(num_of_passwords * sizeof(char*));

    // Going through split string
    for (int i = 0; i < count; i++) {
        // Checking if it's the 4th number
        if (i % 4 == 0) {
            // Adding it to the array!
            manager->names[manager->count] = split[i];

            // It's another password!
            manager->count++;
        }
    }

    // Cleanup
    free(split);
}

// Constructors
Manager* manager_init() {
    // Creating result in memory
    Manager* result = malloc(sizeof(Manager));

    // Setting variables
    result->count = 0;

    // Loading all names on start
    manager_loadnames(result);

    // Returning manager
    return result;
}

// Functions
void manager_savepass(Manager* manager, Password* pass) {
    // Not using Manager Right Now
    UNUSED(manager);

    // DEBUG
    FURI_LOG_D(TAG, "Saving:\nN:%s\nU:%s\nP:%s",
        pass->name,
        pass->user,
        pass->phrase);

    // Our resulting string
    char* result = store_load("Data");
    
    // Is the result empty?
    if(!result) {
        // Allocating result
        result = malloc(sizeof(char*));

        // Setting stuff
        string_append(result, pass->name);
        string_append(result, "|");
        string_append(result, pass->user);
        string_append(result, "|");
        string_append(result, pass->phrase);
        string_append(result, "|0");

        // Saving the data
        store_save("Data", result);

        // Cleanup
        free(result);
        free(pass);
    } else {
        // Our new stuff
        char* new_addon = malloc(sizeof(char*));

        // Adding the Name
        string_append(new_addon, "|");
        string_append(new_addon, pass->name);
        string_append(new_addon, "|");
        string_append(new_addon, pass->user);
        string_append(new_addon, "|");
        string_append(new_addon, pass->phrase);
        string_append(new_addon, "|0");

        // Appending addon to result
        string_append(result, new_addon);

        // Saving the data
        store_save("Data", result);

        // Cleanup
        free(new_addon);
        free(result);
        free(pass);
    }
}
void manager_loadpass(Manager* manager, char* name) {
    // Freeing previous password
    if (manager->current != NULL) {
        free(manager->current);
    }

    // DEBUG
    FURI_LOG_D(TAG, "Loading password of name %s", name);

    // Loading password string
    char* data = store_load("Data");

    // Splitting string
    int count = 0;
    char** split = split_string(data, '|', &count);

    // Unloading data
    free(data);

    // Going through string to grab data
    for(int i = 0; i < count; i++) {
        // Is it a multiple of four?
        if (i % 4 == 0) {
            // Does the password name match?
            if (!strcmp(name, split[i])) {
                // Setting the new current password
                manager->current = pass_init(
                    name, 
                    split[i+1], 
                    split[i+2], 
                    0);

                // Break!
                break;
            }
        }
    }

    // Cleanup
    free(split);
}
void manager_free(Manager* manager) {
    for(int i = 0; i < manager->count; i++) {
        free(manager->names[i]);
    }

    free(manager->current);
    free(manager);
}