Modifiche e correzioni generali ai assisted

src/jsonFile.c

@@ -0,0 +1,113 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <json-c/json.h>
+
+#include "../include/jsonFile.h"
+
+int existsFile(const char *fname) {
+    FILE *file = fopen(fname, "r");
+    if (file) {
+        fclose(file);
+        return 1;
+    }
+    return 0;
+}
+
+int createFile(const char *fname) {
+    json_object *arr = json_object_new_array();
+    if (!arr)
+        return -1;
+
+    int res = json_object_to_file_ext(fname, arr, JSON_C_TO_STRING_PRETTY);
+    json_object_put(arr);
+    return (res == 0) ? 0 : -1;
+}
+
+int renameDataFile(const char *oldName, const char *newName) {
+    return (rename(oldName, newName) == 0) ? 0 : -1;
+}
+
+static json_object *loadRawArray(const char *fname) {
+    if (!existsFile(fname) && createFile(fname) != 0)
+        return NULL;
+
+    FILE *f = fopen(fname, "r");
+    if (!f)
+        return NULL;
+
+    int empty = (fgetc(f) == EOF);
+    fclose(f);
+    if (empty)
+        return json_object_new_array();
+
+    json_object *arr = json_object_from_file(fname);
+    if (!arr)
+        return NULL;
+
+    if (!json_object_is_type(arr, json_type_array)) {
+        json_object_put(arr);
+        return NULL;
+    }
+
+    return arr;
+}
+
+json_object *loadJsonArray(const char *fname) {
+    return loadRawArray(fname);
+}
+
+int saveJsonArray(const char *fname, json_object *arr) {
+    if (!arr)
+        return -1;
+    return (json_object_to_file_ext(fname, arr, JSON_C_TO_STRING_PRETTY) == 0) ? 0 : -1;
+}
+
+json_object *findItemByName(json_object *arr, const char *name) {
+    if (!arr || !name)
+        return NULL;
+
+    size_t n = json_object_array_length(arr);
+    for (size_t i = 0; i < n; i++) {
+        json_object *item = json_object_array_get_idx(arr, i);
+        json_object *jname = NULL;
+
+        if (json_object_object_get_ex(item, "name", &jname) &&
+            strcmp(json_object_get_string(jname), name) == 0)
+            return item;
+    }
+
+    return NULL;
+}
+
+int removeItemByName(json_object *arr, const char *name) {
+    if (!arr || !name)
+        return -1;
+
+    size_t n = json_object_array_length(arr);
+    for (size_t i = 0; i < n; i++) {
+        json_object *item = json_object_array_get_idx(arr, i);
+        json_object *jname = NULL;
+
+        if (json_object_object_get_ex(item, "name", &jname) &&
+            strcmp(json_object_get_string(jname), name) == 0) {
+            json_object_array_del_idx(arr, (int)i, 1);
+            return 0;
+        }
+    }
+
+    return 1;
+}
+
+int renameItemByName(json_object *arr, const char *oldName, const char *newName) {
+    if (!arr || !oldName || !newName)
+        return -1;
+
+    json_object *item = findItemByName(arr, oldName);
+    if (!item)
+        return 1;
+
+    json_object_object_add(item, "name", json_object_new_string(newName));
+    return 0;
+}