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#include "handlers.h"
#include "router.h"
#include "storage_engine.h"
#include "sub_manager.h"
#include "relay_validator.h"
#include "broadcaster.h"
#include "deletion.h"
#include "rate_limiter.h"
#include "relay_types.h"
#include "cJSON.h"
#include "esp_log.h"
#include <string.h>
static const char *TAG = "handlers";
int handle_event(relay_ctx_t *ctx, int conn_fd, const char *event_json, size_t event_len)
{
if (!ctx || !event_json) return -1;
if (ctx->rate_limiter) {
if (!rate_limiter_check(ctx->rate_limiter, conn_fd, RATE_TYPE_EVENT)) {
router_send_ok(ctx, conn_fd, "", false, "rate limited");
return -1;
}
}
cJSON *obj = cJSON_ParseWithLength(event_json, event_len);
if (!obj) {
router_send_ok(ctx, conn_fd, "", false, "invalid JSON");
return -1;
}
cJSON *id_item = cJSON_GetObjectItem(obj, "id");
cJSON *pubkey_item = cJSON_GetObjectItem(obj, "pubkey");
cJSON *kind_item = cJSON_GetObjectItem(obj, "kind");
cJSON *ca_item = cJSON_GetObjectItem(obj, "created_at");
if (!id_item || !pubkey_item || !kind_item || !ca_item) {
cJSON_Delete(obj);
router_send_ok(ctx, conn_fd, "", false, "missing required fields");
return -1;
}
const char *id_hex = id_item->valuestring;
const char *pubkey_hex = pubkey_item->valuestring;
int kind = kind_item->valueint;
uint64_t created_at = (uint64_t)ca_item->valuedouble;
if (ctx->config.max_future_sec > 0) {
int64_t now = (int64_t)(xTaskGetTickCount() / configTICK_RATE_HZ);
if ((int64_t)created_at > now + ctx->config.max_future_sec) {
cJSON_Delete(obj);
router_send_ok(ctx, conn_fd, id_hex, false, "created_at too far in future");
return -1;
}
}
uint8_t event_id[32];
if (relay_hex_to_bytes(id_hex, 64, event_id, 32) != 0) {
cJSON_Delete(obj);
router_send_ok(ctx, conn_fd, "", false, "invalid event id");
return -1;
}
if (storage_event_exists(ctx->storage, event_id)) {
cJSON_Delete(obj);
router_send_ok(ctx, conn_fd, id_hex, true, "duplicate");
return 0;
}
if (!relay_validator_verify_event(event_json, event_len)) {
cJSON_Delete(obj);
router_send_ok(ctx, conn_fd, id_hex, false, "invalid signature");
return -1;
}
cJSON_Delete(obj);
storage_error_t err = storage_save_event_json(ctx->storage, event_json, event_len);
if (err != STORAGE_OK) {
const char *msg = (err == STORAGE_ERR_FULL) ? "relay full" :
(err == STORAGE_ERR_DUPLICATE) ? "duplicate" : "storage error";
router_send_ok(ctx, conn_fd, id_hex, false, msg);
return -1;
}
router_send_ok(ctx, conn_fd, id_hex, true, "");
if (kind == NOSTR_KIND_DELETION) {
deletion_process_json(ctx->storage, event_json, event_len);
}
broadcaster_fanout_json(ctx, event_json, event_len, kind, pubkey_hex, created_at);
return 0;
}
static void parse_filter_json(const char *json, sub_filter_t *filter)
{
memset(filter, 0, sizeof(sub_filter_t));
cJSON *obj = cJSON_Parse(json);
if (!obj) return;
cJSON *arr;
arr = cJSON_GetObjectItem(obj, "ids");
if (arr && cJSON_IsArray(arr)) {
filter->ids_count = cJSON_GetArraySize(arr);
if (filter->ids_count > SUB_MAX_FILTER_IDS) filter->ids_count = SUB_MAX_FILTER_IDS;
for (size_t i = 0; i < filter->ids_count; i++)
filter->ids[i] = strdup(cJSON_GetArrayItem(arr, i)->valuestring);
}
arr = cJSON_GetObjectItem(obj, "authors");
if (arr && cJSON_IsArray(arr)) {
filter->authors_count = cJSON_GetArraySize(arr);
if (filter->authors_count > SUB_MAX_FILTER_AUTHORS) filter->authors_count = SUB_MAX_FILTER_AUTHORS;
for (size_t i = 0; i < filter->authors_count; i++)
filter->authors[i] = strdup(cJSON_GetArrayItem(arr, i)->valuestring);
}
arr = cJSON_GetObjectItem(obj, "kinds");
if (arr && cJSON_IsArray(arr)) {
filter->kinds_count = cJSON_GetArraySize(arr);
if (filter->kinds_count > SUB_MAX_FILTER_KINDS) filter->kinds_count = SUB_MAX_FILTER_KINDS;
for (size_t i = 0; i < filter->kinds_count; i++)
filter->kinds[i] = cJSON_GetArrayItem(arr, i)->valueint;
}
arr = cJSON_GetObjectItem(obj, "#e");
if (arr && cJSON_IsArray(arr)) {
filter->e_tags_count = cJSON_GetArraySize(arr);
if (filter->e_tags_count > SUB_MAX_FILTER_ETAGS) filter->e_tags_count = SUB_MAX_FILTER_ETAGS;
for (size_t i = 0; i < filter->e_tags_count; i++)
filter->e_tags[i] = strdup(cJSON_GetArrayItem(arr, i)->valuestring);
}
arr = cJSON_GetObjectItem(obj, "#p");
if (arr && cJSON_IsArray(arr)) {
filter->p_tags_count = cJSON_GetArraySize(arr);
if (filter->p_tags_count > SUB_MAX_FILTER_PTAGS) filter->p_tags_count = SUB_MAX_FILTER_PTAGS;
for (size_t i = 0; i < filter->p_tags_count; i++)
filter->p_tags[i] = strdup(cJSON_GetArrayItem(arr, i)->valuestring);
}
cJSON *since = cJSON_GetObjectItem(obj, "since");
if (since) filter->since = (int64_t)since->valuedouble;
cJSON *until = cJSON_GetObjectItem(obj, "until");
if (until) filter->until = (int64_t)until->valuedouble;
cJSON *limit = cJSON_GetObjectItem(obj, "limit");
if (limit) filter->limit = limit->valueint;
cJSON_Delete(obj);
}
void handle_req(relay_ctx_t *ctx, int conn_fd, const char *sub_id, const char *filters_json)
{
if (!ctx || !sub_id) return;
if (ctx->rate_limiter) {
if (!rate_limiter_check(ctx->rate_limiter, conn_fd, RATE_TYPE_REQ)) {
router_send_closed(ctx, conn_fd, sub_id, "rate limited");
return;
}
}
sub_filter_t filter;
parse_filter_json(filters_json, &filter);
int query_kind = -1;
const char *query_author = NULL;
int query_limit = filter.limit > 0 ? filter.limit : 100;
if (filter.kinds_count > 0) query_kind = filter.kinds[0];
if (filter.authors_count > 0) query_author = filter.authors[0];
char **results = NULL;
uint16_t count = 0;
storage_query_events_json(ctx->storage, query_kind, query_author,
query_limit, &results, &count);
for (uint16_t i = 0; i < count; i++) {
router_send_event(ctx, conn_fd, sub_id, results[i], strlen(results[i]));
}
storage_free_query_results(results, count);
router_send_eose(ctx, conn_fd, sub_id);
sub_manager_add(ctx->sub_manager, conn_fd, sub_id, &filter, 1);
sub_filter_t *f = &filter;
for (size_t i = 0; i < f->ids_count; i++) free(f->ids[i]);
for (size_t i = 0; i < f->authors_count; i++) free(f->authors[i]);
for (size_t i = 0; i < f->e_tags_count; i++) free(f->e_tags[i]);
for (size_t i = 0; i < f->p_tags_count; i++) free(f->p_tags[i]);
}
int handle_close(relay_ctx_t *ctx, int conn_fd, const char *sub_id)
{
if (!ctx || !sub_id) return -1;
sub_manager_remove(ctx->sub_manager, conn_fd, sub_id);
return 0;
}
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