4 files changed, 230 insertions(+), 0 deletions(-)

A file-browser/include/file_access.h
A file-browser/include/path.h
A file-browser/src/file_access.c
A file-browser/src/path.c

@@ 0,0 1,159 @@
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+typedef enum {
+  TYPE_FOLDER,
+  TYPE_FILE,
+  TYPE_OTHER,
+  TYPE_UNKNOWN,
+} filetype_t;
+
+typedef enum {
+  FA_LOCAL,  // root fs
+  FA_EXTERN, // not mounted device to be mounted when opened
+  FA_TEMP,
+  FA_COUNT,
+} fileaccess_type_t;
+
+typedef struct {
+  uint8_t owner : 3;
+  uint8_t group : 3;
+  uint8_t other : 3;
+} file_permissions_t;
+
+typedef struct {
+  char *path;
+  filetype_t type;
+
+  // stats
+  uint64_t size;
+  uint64_t modify_date;
+  uint64_t create_date;
+  file_permissions_t permissions;
+  char *owner;
+  char *group_owner;
+} file_t;
+
+typedef struct {
+  char *path;
+  file_t *files;
+  uint32_t files_count;
+} directory_t;
+
+typedef enum {
+  FILOPER_SUCCESS,
+  FILOPER_PERMISSIONS,
+  FILOPER_DOES_NOT_EXIST,
+  FILOPER_USED,
+  FILOPER_UNKNOWN,
+} file_operation_error_t;
+
+typedef struct {
+  bool error;
+  union {
+    file_operation_error_t error;
+    pid_t pid;
+  } payload;
+} pid_or_error_t;
+
+typedef struct {
+  bool error;
+  union {
+    file_operation_error_t error;
+    directory_t *directory;
+  } payload;
+} directory_or_error_t;
+
+typedef struct fileaccess_t fileaccess_t;
+
+typedef struct {
+  const fileaccess_t *fileaccess;
+  void *state;
+} fileaccess_state_t;
+
+typedef fileaccess_state_t (*init_state_fn)(void *data);
+typedef bool (*deinit_state_fn)(fileaccess_state_t state);
+
+typedef directory_or_error_t (*list_directory_fn)(fileaccess_state_t state,
+                                                  char *path);
+typedef directory_or_error_t (*list_root_fn)(fileaccess_state_t state);
+
+typedef directory_or_error_t (*create_directory_fn)(fileaccess_state_t state,
+                                                    char *path);
+typedef file_operation_error_t (*close_directory_fn)(fileaccess_state_t state,
+                                                     directory_t *directory);
+
+typedef file_operation_error_t (*get_mime_type_fn)(fileaccess_state_t state,
+                                                   file_t *file, char *mime);
+typedef pid_or_error_t (*execute_file_fn)(fileaccess_state_t state,
+                                          file_t *file, char *args);
+
+typedef file_operation_error_t (*delete_directory_fn)(fileaccess_state_t state,
+                                                      directory_t *directory);
+typedef file_operation_error_t (*delete_file_fn)(fileaccess_state_t state,
+                                                 directory_t *directory);
+
+struct fileaccess_t {
+  fileaccess_type_t type;
+
+  init_state_fn init;
+  deinit_state_fn deinit;
+
+  list_directory_fn list_directory;
+  list_root_fn list_root;
+
+  create_directory_fn create_directory;
+  close_directory_fn close_directory;
+
+  get_mime_type_fn get_mime_type;
+  execute_file_fn execute_file;
+
+  delete_directory_fn delete_directory;
+  delete_file_fn delete_file;
+};
+
+typedef struct fileaccess_connector_t fileaccess_connector_t;
+typedef file_operation_error_t (*file_copy_fn)(
+    fileaccess_connector_t *connector, void *first_state, void *second_state,
+    file_t *file, char *destination);
+typedef file_operation_error_t (*file_move_fn)(
+    fileaccess_connector_t *connector, void *first_state, void *second_state,
+    file_t *file, char *destination);
+
+struct fileaccess_connector_t {
+  const fileaccess_t *first;
+  const fileaccess_t *second;
+
+  file_copy_fn copy;
+  file_move_fn move;
+};
+
+extern const fileaccess_t
+    local_file_access; // state is root directory descriptor
+extern const fileaccess_t
+    extern_file_access; // state is mount directory descriptor
+extern const fileaccess_t
+    temp_file_access; // state is /tmp directory descriptor
+
+extern const fileaccess_connector_t connectors[FA_COUNT*FA_COUNT];
+
+fileaccess_state_t fileaccess_init(const fileaccess_t *fileaccess, void *data);
+bool fileaccess_deinit(fileaccess_state_t state);
+
+directory_or_error_t fileaccess_directory_list(fileaccess_state_t state,
+                                               char *path);
+
+directory_or_error_t fileaccess_root_list(fileaccess_state_t state);
+
+directory_or_error_t fileaccess_directory_create(fileaccess_state_t state,
+                                                 char *path);
+file_operation_error_t fileaccess_directory_close(fileaccess_state_t state,
+                                                  directory_t *directory);
+
+file_operation_error_t fileaccess_file_get_mimetype(fileaccess_state_t state,
+                                                    file_t *file,
+                                                    /*out*/ char *mime);
+
+pid_or_error_t fileaccess_file_execute(fileaccess_state_t state, file_t *file,
+                                       char *args);

@@ 0,0 1,4 @@
+#include <string.h>
+#include <stdbool.h>
+
+char *path_join(char *base, char *relative);

@@ 0,0 1,40 @@
+#include "file_access.h"
+#include <string.h>
+
+fileaccess_state_t fileaccess_init(const fileaccess_t *fileaccess, void *data) {
+  return fileaccess->init(data);
+}
+
+bool fileaccess_deinit(fileaccess_state_t state) {
+  return state.fileaccess->deinit(state);
+}
+
+directory_or_error_t fileaccess_directory_list(fileaccess_state_t state,
+                                               char *path) {
+  return state.fileaccess->list_directory(state, path);
+}
+
+directory_or_error_t fileaccess_root_list(fileaccess_state_t state) {
+  return state.fileaccess->list_root(state);
+}
+
+directory_or_error_t fileaccess_directory_create(fileaccess_state_t state,
+                                                 char *path) {
+  return state.fileaccess->create_directory(state, path);
+}
+
+file_operation_error_t fileaccess_directory_close(fileaccess_state_t state,
+                                                  directory_t *directory) {
+  return state.fileaccess->close_directory(state, directory);
+}
+
+file_operation_error_t fileaccess_file_get_mimetype(fileaccess_state_t state,
+                                                    file_t *file,
+                                                    /*out*/ char *mime) {
+  return state.fileaccess->get_mime_type(state, file, mime);
+}
+
+pid_or_error_t fileaccess_file_execute(fileaccess_state_t state, file_t *file,
+                                       char *args) {
+  return state.fileaccess->execute_file(state, file, args);
+}

@@ 0,0 1,27 @@
+#include "path.h"
+#include <stdlib.h>
+#include <string.h>
+
+char *path_join(char *base, char *relative) {
+  size_t base_len = strlen(base);
+  size_t relative_len = strlen(relative);
+
+  while (base[base_len - 1] == '/' && base_len > 0) {
+    base_len--;
+  }
+
+  while (relative[0] == '/' && relative_len > 0) {
+    relative_len--;
+    relative++;
+  }
+
+  size_t new_len = base_len + relative_len + 1; // length of the string
+  char *out = malloc((new_len + 1) * sizeof(out)); // length of the string plus one for \0
+  out[new_len] = '\0';
+  out[base_len] = '/';
+
+  memcpy(out, base, base_len);
+  memcpy(out + base_len + 1, relative, relative_len);
+
+  return out;
+}