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ant/src/modules/localstorage.c
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localstorage.c
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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <uthash.h>
#include <yyjson.h>
#include "ant.h"
#include "arena.h"
#include "runtime.h"
#include "modules/symbol.h"
#include "modules/localstorage.h"
typedef struct storage_entry {
char *key;
char *value;
UT_hash_handle hh;
} storage_entry_t;
static storage_entry_t *local_storage = NULL;
static char *storage_file_path = NULL;
static void storage_save(void) {
if (!storage_file_path) return;
yyjson_mut_doc *doc = yyjson_mut_doc_new(NULL);
if (!doc) return;
yyjson_mut_val *root = yyjson_mut_obj(doc);
yyjson_mut_doc_set_root(doc, root);
storage_entry_t *entry, *tmp;
HASH_ITER(hh, local_storage, entry, tmp) {
yyjson_mut_obj_add_str(doc, root, entry->key, entry->value);
}
yyjson_write_err err;
yyjson_mut_write_file(storage_file_path, doc, YYJSON_WRITE_PRETTY, NULL, &err);
yyjson_mut_doc_free(doc);
}
static void storage_load(void) {
if (!storage_file_path) return;
yyjson_read_err err;
yyjson_doc *doc = yyjson_read_file(storage_file_path, 0, NULL, &err);
if (!doc) return;
yyjson_val *root = yyjson_doc_get_root(doc);
if (!yyjson_is_obj(root)) {
yyjson_doc_free(doc);
return;
}
yyjson_obj_iter iter;
yyjson_obj_iter_init(root, &iter);
yyjson_val *key, *val;
while ((key = yyjson_obj_iter_next(&iter))) {
val = yyjson_obj_iter_get_val(key);
if (yyjson_is_str(key) && yyjson_is_str(val)) {
const char *k = yyjson_get_str(key);
const char *v = yyjson_get_str(val);
size_t klen = yyjson_get_len(key);
size_t vlen = yyjson_get_len(val);
storage_entry_t *entry = ANT_GC_MALLOC(sizeof(storage_entry_t) + klen + 1 + vlen + 1);
if (!entry) continue;
entry->key = (char *)(entry + 1);
entry->value = entry->key + klen + 1;
memcpy(entry->key, k, klen);
entry->key[klen] = '\0';
memcpy(entry->value, v, vlen);
entry->value[vlen] = '\0';
HASH_ADD_KEYPTR(hh, local_storage, entry->key, klen, entry);
}
}
yyjson_doc_free(doc);
}
static void storage_clear(void) {
storage_entry_t *entry, *tmp;
HASH_ITER(hh, local_storage, entry, tmp) {
HASH_DEL(local_storage, entry);
ANT_GC_FREE(entry);
}
}
static void storage_set_item(const char *key, size_t key_len, const char *value, size_t value_len) {
storage_entry_t *entry = NULL;
HASH_FIND(hh, local_storage, key, key_len, entry);
if (entry) {
HASH_DEL(local_storage, entry);
ANT_GC_FREE(entry);
}
entry = ANT_GC_MALLOC(sizeof(storage_entry_t) + key_len + 1 + value_len + 1);
if (!entry) return;
entry->key = (char *)(entry + 1);
entry->value = entry->key + key_len + 1;
memcpy(entry->key, key, key_len);
entry->key[key_len] = '\0';
memcpy(entry->value, value, value_len);
entry->value[value_len] = '\0';
HASH_ADD_KEYPTR(hh, local_storage, entry->key, key_len, entry);
storage_save();
}
static char *storage_get_item(const char *key, size_t key_len) {
storage_entry_t *entry = NULL;
HASH_FIND(hh, local_storage, key, key_len, entry);
return entry ? entry->value : NULL;
}
static void storage_remove_item(const char *key, size_t key_len) {
storage_entry_t *entry = NULL;
HASH_FIND(hh, local_storage, key, key_len, entry);
if (entry) {
HASH_DEL(local_storage, entry);
ANT_GC_FREE(entry);
storage_save();
}
}
static size_t storage_length(void) {
return HASH_COUNT(local_storage);
}
static char *storage_key(size_t index) {
storage_entry_t *entry;
size_t i = 0;
for (entry = local_storage; entry != NULL; entry = entry->hh.next) {
if (i == index) return entry->key;
i++;
}
return NULL;
}
#define CHECK_FILE_SET(js) \
if (!storage_file_path) { \
return js_mkerr(js, "Warning: `--localstorage-file` or `localStorage.setFile` were not provided with valid paths."); \
}
// localStorage.setItem(key, value)
static jsval_t js_localstorage_setItem(struct js *js, jsval_t *args, int nargs) {
CHECK_FILE_SET(js);
if (nargs < 2) {
return js_mkerr(js, "Failed to execute 'setItem' on 'Storage': 2 arguments required");
}
size_t key_len, value_len;
char *key = js_getstr(js, args[0], &key_len);
char *value = js_getstr(js, js_tostring_val(js, args[1]), &value_len);
storage_set_item(key, key_len, value, value_len);
return js_mkundef();
}
// localStorage.getItem(key)
static jsval_t js_localstorage_getItem(struct js *js, jsval_t *args, int nargs) {
CHECK_FILE_SET(js);
if (nargs < 1) {
return js_mkerr(js, "Failed to execute 'getItem' on 'Storage': 1 argument required");
}
size_t key_len;
char *key = js_getstr(js, args[0], &key_len);
char *value = storage_get_item(key, key_len);
if (!value) return js_mknull();
return js_mkstr(js, value, strlen(value));
}
// localStorage.removeItem(key)
static jsval_t js_localstorage_removeItem(struct js *js, jsval_t *args, int nargs) {
CHECK_FILE_SET(js);
if (nargs < 1) {
return js_mkerr(js, "Failed to execute 'removeItem' on 'Storage': 1 argument required");
}
size_t key_len;
char *key = js_getstr(js, args[0], &key_len);
storage_remove_item(key, key_len);
return js_mkundef();
}
// localStorage.clear()
static jsval_t js_localstorage_clear(struct js *js, jsval_t *args, int nargs) {
CHECK_FILE_SET(js);
(void)args; (void)nargs;
storage_clear();
storage_save();
return js_mkundef();
}
// localStorage.key(index)
static jsval_t js_localstorage_key(struct js *js, jsval_t *args, int nargs) {
CHECK_FILE_SET(js);
if (nargs < 1) {
return js_mkerr(js, "Failed to execute 'key' on 'Storage': 1 argument required");
}
if (js_type(args[0]) != JS_NUM) {
return js_mknull();
}
double idx = js_getnum(args[0]);
if (idx < 0) return js_mknull();
size_t index = (size_t)idx;
char *key = storage_key(index);
if (!key) return js_mknull();
return js_mkstr(js, key, strlen(key));
}
// localStorage.length
static jsval_t js_localstorage_length(struct js *js, jsval_t *args, int nargs) {
(void)args; (void)nargs;
CHECK_FILE_SET(js)
return js_mknum((double)storage_length());
}
// localStorage.setFile(path)
static jsval_t js_localstorage_setFile(struct js *js, jsval_t *args, int nargs) {
if (nargs < 1) {
return js_mkerr(js, "Failed to execute 'setFile' on 'Storage': 1 argument required");
}
size_t path_len;
char *path = js_getstr(js, args[0], &path_len);
if (storage_file_path) {
free(storage_file_path);
}
storage_file_path = malloc(path_len + 1);
if (!storage_file_path) {
return js_mkerr(js, "Failed to allocate memory for file path");
}
memcpy(storage_file_path, path, path_len);
storage_file_path[path_len] = '\0';
// Load existing data from the new file
storage_load();
return js_mkundef();
}
void init_localstorage_module() {
struct js *js = rt->js;
jsval_t glob = js_glob(js);
const char *file_path = rt->ls_fp;
if (file_path) {
storage_file_path = strdup(file_path);
storage_load();
}
jsval_t storage_obj = js_mkobj(js);
js_set(js, storage_obj, "setItem", js_mkfun(js_localstorage_setItem));
js_set(js, storage_obj, "getItem", js_mkfun(js_localstorage_getItem));
js_set(js, storage_obj, "removeItem", js_mkfun(js_localstorage_removeItem));
js_set(js, storage_obj, "clear", js_mkfun(js_localstorage_clear));
js_set(js, storage_obj, "key", js_mkfun(js_localstorage_key));
js_set(js, storage_obj, "setFile", js_mkfun(js_localstorage_setFile));
jsval_t length_getter = js_mkfun(js_localstorage_length);
js_set_getter_desc(js, storage_obj, "length", 6, length_getter, JS_DESC_E);
js_set(js, storage_obj, get_toStringTag_sym_key(), js_mkstr(js, "Storage", 7));
js_set(js, glob, "localStorage", storage_obj);
}

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