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SD-Card-(DEV).md
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SD-Card-(DEV).md
@ -120,69 +120,369 @@ if(check_sd_card()) { // Check to see if SD Card is mounted
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}
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```
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### Delete Directory
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### Create File
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To create a file we can use the `create()` function from [File](https://github.com/eried/portapack-mayhem/blob/next/firmware/application/file.cpp) class. The helper function below will return true if `create()` succeeds (Success from `create()` returns a 0, other values means failure) and takes two variable inputs for file path and directory name. Again the input for the file path is a `std::filesystem::path` which can be `UTF-16 string literal`. The root of the SD Card is `u""` and any directory beyond that is `u"DIRECTORY/SUB_DIRECTORY"`.
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#### ui_newapp.cpp
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```
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bool NewAppView::create_file(const std::filesystem::path& path, std::string name) {
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File file = { }; // Create File object
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Optional<File::Error> sucess = file.create(path.string() + "/" + name); // Create File
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return !(sucess.is_valid()); // 0 is success
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}
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```
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Below is an example on how the `create_file()` function can be used with basic error handling.
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#### ui_newapp.cpp
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```
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// New file
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(create_file(u"", "NEW_FILE.txt")) { // New file in root of SD Card, returns true if successful
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// Logic if new file succeeded
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} else {
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// Logic else new file failed
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}
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} else { // Else, check_sd_card() returned false
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// Logic else SD Card is NOT mounted
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}
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```
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### Read File
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### Write File
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### Delete File
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### Delete File or Directory
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**NOTE: Code below reflects future update, current implementation of delete_file() dose not return a value.**
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To delete a file or directory the `delete_file()` function from [File](https://github.com/eried/portapack-mayhem/blob/next/firmware/application/file.cpp) can be used. The helper function below will return true if `delete_file()` succeeds (Success from `make_new_directory()` returns a 0, other values means failure) and takes two variable inputs for file path and directory name. Again the input for the file path is a `std::filesystem::path` which can be `UTF-16 string literal`. The root of the SD Card is `u""` and any directory beyond that is `u"DIRECTORY/SUB_DIRECTORY"`
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#### ui_newapp.cpp
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```
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bool NewAppView::delete_dir_or_file(const std::filesystem::path& path, std::string name) {
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return !(delete_file(path.string() + "/" + name));
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}
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```
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Below is an example on how the `delete_dir_or_file()` function can be used with basic error handling.
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#### ui_newapp.cpp
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```
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(delete_dir_or_file(u"", "NEW_DIR")) { // New dir in root of SD Card
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// Logic if file/dir delete was successful
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} else {
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// Logic if file/dir delete was NOT successful
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}
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} else { // Else, check_sd_card() returned false
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// Logic else SD Card is NOT mounted
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}
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```
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## Wrap Up
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Below is example demo of all basic CRUD functions for files and directorys.
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### ui_newapp.hpp
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```
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#include "ui.hpp"
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#include "ui_widget.hpp"
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#include "ui_navigation.hpp"
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#include "string_format.hpp"
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#include "ui.hpp"
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#include "ui_widget.hpp"
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#include "ui_navigation.hpp"
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#include "string_format.hpp"
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// Add these to include File Class and SD Card helper functions.
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#include "file.hpp"
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#include "sd_card.hpp"
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// Add this to include the File Class.
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#include "file.hpp"
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namespace ui
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{
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// Struct that outlines file information
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struct file_entry {
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std::filesystem::path entry_path { };
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uint32_t size { };
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bool is_directory { };
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};
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namespace ui
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{
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class NewAppView : public View // App class declaration
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{
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public:
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// Public declarations
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void focus() override; // ui::View function override
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NewAppView(NavigationView &nav); // App class init function declaration
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std::string title() const override { return "New App"; }; // App title
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private:
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void update(); // Function declaration
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MessageHandlerRegistration message_handler_update{ // Example, not required: MessageHandlerRegistration class
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Message::ID::DisplayFrameSync, // relays messages to your app code from baseband. Every time you
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[this](const Message *const) { // get a DisplayFrameSync message the update() function will
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this->update(); // be triggered.
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}};
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// Function declarations
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// Error check
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bool check_sd_card();
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// DIR CRUD
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bool create_dir(const std::filesystem::path& path, std::string name);
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std::vector<file_entry> list_dir(const std::filesystem::path& path);
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// File CRUD
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bool create_file(const std::filesystem::path& path, std::string name);
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bool rename_dir_or_file(const std::filesystem::path& path, std::string old_name, std::string new_name);
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std::string read_file(const std::filesystem::path& path, std::string name);
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bool write_file(const std::filesystem::path& path, std::string name, std::string data);
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bool delete_dir_or_file(const std::filesystem::path& path, std::string name);
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// Widgets
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Console my_console {
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{ 1*8, 1*8, 224, 296 }, // Coordinates are: int:x (px), int:y (px), int:width (px), int:height (px)
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};
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}
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};
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}
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```
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### ui_newapp.cpp
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```
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#include "ui_newapp.hpp"
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#include "portapack.hpp"
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#include <cstring>
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#include "ui_newapp.hpp"
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#include "portapack.hpp"
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#include <cstring>
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using namespace portapack;
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using namespace portapack;
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namespace ui
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{
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void NewAppView::focus() { // Default selection to my_console when app starts
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my_console.focus();
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}
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// Checks SD Card, returns true if Mounted, false if otherwise
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bool NewAppView::check_sd_card() {
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//return (sd_card::status() == sd_card::Status::Mounted) ? true : false;
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return true;
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}
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// Lists all files and directorys in path
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std::vector<file_entry> NewAppView::list_dir(const std::filesystem::path& path) {
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// Files and directories list
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std::vector<file_entry> entry_list { };
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// For each entry in the file system's directory
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// Adds files in directorys into entry_list{}
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// Directorys are inserted infront of files
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for (const auto& entry : std::filesystem::directory_iterator(path, u"*")) {
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// Dose not add directorys or files starting with '.' (hidden / tmp)
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if (entry.path().string().length() && entry.path().filename().string()[0] != '.') {
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// If file
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if (std::filesystem::is_regular_file(entry.status())) {
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entry_list.push_back({ entry.path(), (uint32_t)entry.size(), false });
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// Else If directory
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} else if (std::filesystem::is_directory(entry.status())) {
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entry_list.insert(entry_list.begin(), { entry.path(), 0, true });
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// Other
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} else {
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continue;
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}
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}
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}
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return entry_list;
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}
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// Creates dir, returns true if sucessfull
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bool NewAppView::create_dir(const std::filesystem::path& path, std::string name) { // make_new_directory() returns 0 for sucess
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return !(make_new_directory(path.string() + "/" + name)); // and other values means failure. Not operation
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} // will return true only when 0 is returned.
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bool NewAppView::delete_dir_or_file(const std::filesystem::path& path, std::string name) { // Deletes file or dir.
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return !(delete_file(path.string() + "/" + name)); // 0 is sucess.
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}
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bool NewAppView::create_file(const std::filesystem::path& path, std::string name) {
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File file = { }; // Create File object
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Optional<File::Error> sucess = file.create(path.string() + "/" + name); // Create File
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return !(sucess.is_valid()); // 0 is sucess
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}
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bool NewAppView::rename_dir_or_file(const std::filesystem::path& path, std::string old_name, std::string new_name) {
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return !(rename_file(path.string() + "/" + old_name, new_name)); // 0 is sucess
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}
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std::string NewAppView::read_file(const std::filesystem::path& path, std::string name) { // Read file
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std::string return_string = ""; // String to be returned
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File file; // Create File object
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auto sucess = file.open(path.string() + "/" + name); // Open file to write
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if(!sucess.is_valid()) { // 0 is sucess
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char one_char[1]; // Read file char by char
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for(size_t pointer = 0; pointer < file.size() ; pointer++) { // Example won't work for large files
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file.seek(pointer); // Sets file to next pointer
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file.read(one_char, 1); // sets char to one_char[]
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return_string += one_char[0]; // Add it to the return_string
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}
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} else {
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return "0"; // Basic error handling
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}
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return return_string;
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}
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bool NewAppView::write_file(const std::filesystem::path& path, std::string name, std::string data) {
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File file; // Create File object
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auto sucess = file.append(path.string() + "/" + name); // Open file
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if(!sucess.is_valid()) { // 0 is sucess
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file.write_line(data);
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return true;
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} else {
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return false;
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}
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}
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namespace ui
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{
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NewAppView::NewAppView(NavigationView &nav) // Application Main
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{
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// App code
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add_children({
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&my_console, // Add pointers for widgets
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});
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// Enable scrolling
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my_console.enable_scrolling(true);
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// Check SD Card
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if(check_sd_card()) { // Check to see if SD Card is mounted
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my_console.writeln("+ SD Card is Mounted");
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- SD Card is NOT Mounted");
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}
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void NewAppView::update() // Every time you get a DisplayFrameSync message this function will be ran
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{
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// Message code
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// New directory
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(create_dir(u"", "NEW_DIR")) { // New dir in root of SD Card, returns true if sucessfull
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my_console.writeln("+ New directory created"); // If new dir succeeded
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} else {
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my_console.writeln("- New directory FAILED"); // Else new dir failed
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- New directory FAILED");
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}
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// List Directory
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std::string dir_contents = ""; // String var that displays the dir contents
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std::vector<file_entry> files = { }; // file_entry Vector
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if(check_sd_card()) { // Check to see if SD Card is mounted
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files = list_dir(u""); // dir of SD Card, u"" is root, u"DIRECTORY_NAME" for other directorys
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// Vector has a capacity of 64 objects
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if(files.size()) { // If files are not empty
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dir_contents += "+ dir SD Card: ";
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for (const auto& f : files) { // For each f of files
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dir_contents += f.entry_path.string() + ", "; // Copy name to dir_contents
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}
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} else { // Else, files are empty
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my_console.writeln("- dir SD Card FAILED");
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- dir SD Card FAILED");
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}
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//my_console.writeln(dir_contents); // Write results to my_console
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// Write total count to my_console
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my_console.writeln("+ dir SD Card: " + std::to_string(files.size()) + " items");
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// Rename directory
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(rename_dir_or_file(u"", "NEW_DIR", "NEWER_DIR")) { // Renames dir in root of SD Card, returns true if sucessfull
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my_console.writeln("+ Directory renamed"); // If dir renamed succeeded
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} else {
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my_console.writeln("- Directory renamed FAILED"); // Else new dir renamed failed
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- Directory renamed FAILED");
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}
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// Delete file or directory
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(delete_dir_or_file(u"", "NEWER_DIR")) { // New dir in root of SD Card
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my_console.writeln("+ New directory deleted");
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} else {
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my_console.writeln("- New directory deleted FAILED");
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- New directory deleted FAILED");
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}
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// New file
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(create_file(u"", "NEW_FILE.txt")) { // New dir in root of SD Card, returns true if sucessfull
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my_console.writeln("+ New file created"); // If new file succeeded
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} else {
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my_console.writeln("- New file FAILED"); // Else new file failed
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- New file FAILED");
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}
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// Rename file
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(rename_dir_or_file(u"", "NEW_FILE.txt", "NEWER_FILE.TXT")) { // Renames file, returns true if sucessfull
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my_console.writeln("+ File renamed"); // If file renamed succeeded
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} else {
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my_console.writeln("- File renamed FAILED"); // Else new file renamed failed
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- File renamed FAILED");
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}
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// Write file
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if(check_sd_card()) { // Check to see if SD Card is mounted
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std::string data = "Your mother was a hamster!";
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if(write_file(u"", "NEWER_FILE.TXT", data)) { // Sucess is anything but 0
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my_console.writeln("+ Write File"); // Write data to my_console
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} else {
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my_console.writeln("- Write file FAILED");
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- Write file FAILED");
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}
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// Read file
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if(check_sd_card()) { // Check to see if SD Card is mounted
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std::string data = ""; // Create output string
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data = read_file(u"", "NEWER_FILE.TXT"); // read_file()
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if(data != "0") { // Sucess is anything but 0
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my_console.writeln("+ Read file: " + data); // Write data to my_console
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} else {
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my_console.writeln("- Read file FAILED");
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- Read file FAILED");
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}
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// Delete file or directory
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if(check_sd_card()) { // Check to see if SD Card is mounted
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if(delete_dir_or_file(u"", "NEWER_FILE.TXT")) { // New dir in root of SD Card
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my_console.writeln("+ New file deleted");
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} else {
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my_console.writeln("- New file deleted FAILED");
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}
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} else { // Else, check_sd_card() returned false
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my_console.writeln("- New file deleted FAILED");
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}
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// Done
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my_console.writeln("+ Demo Complete");
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}
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}
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```
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