3365db45b9
MEMORY.md for long-term memory, daily YYYY-MM-DD.md notes. JSONL session files per chat_id with ring buffer history (max 20 messages). All persisted on SPIFFS. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
#include "memory_store.h"
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#include "mimi_config.h"
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <sys/stat.h>
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#include "esp_log.h"
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static const char *TAG = "memory";
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static void get_date_str(char *buf, size_t size, int days_ago)
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{
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time_t now;
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time(&now);
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now -= days_ago * 86400;
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struct tm tm;
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localtime_r(&now, &tm);
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strftime(buf, size, "%Y-%m-%d", &tm);
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}
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esp_err_t memory_store_init(void)
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{
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/* SPIFFS is flat — no real directory creation needed.
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Just verify we can open the base path. */
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ESP_LOGI(TAG, "Memory store initialized at %s", MIMI_SPIFFS_BASE);
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return ESP_OK;
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}
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esp_err_t memory_read_long_term(char *buf, size_t size)
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{
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FILE *f = fopen(MIMI_MEMORY_FILE, "r");
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if (!f) {
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buf[0] = '\0';
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return ESP_ERR_NOT_FOUND;
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}
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size_t n = fread(buf, 1, size - 1, f);
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buf[n] = '\0';
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fclose(f);
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return ESP_OK;
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}
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esp_err_t memory_write_long_term(const char *content)
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{
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FILE *f = fopen(MIMI_MEMORY_FILE, "w");
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if (!f) {
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ESP_LOGE(TAG, "Cannot write %s", MIMI_MEMORY_FILE);
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return ESP_FAIL;
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}
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fputs(content, f);
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fclose(f);
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ESP_LOGI(TAG, "Long-term memory updated (%d bytes)", (int)strlen(content));
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return ESP_OK;
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}
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esp_err_t memory_append_today(const char *note)
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{
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char date_str[16];
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get_date_str(date_str, sizeof(date_str), 0);
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char path[64];
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snprintf(path, sizeof(path), "%s/%s.md", MIMI_SPIFFS_MEMORY_DIR, date_str);
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FILE *f = fopen(path, "a");
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if (!f) {
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/* Try creating — if file doesn't exist yet, write header */
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f = fopen(path, "w");
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if (!f) {
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ESP_LOGE(TAG, "Cannot open %s", path);
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return ESP_FAIL;
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}
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fprintf(f, "# %s\n\n", date_str);
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}
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fprintf(f, "%s\n", note);
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fclose(f);
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return ESP_OK;
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}
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esp_err_t memory_read_recent(char *buf, size_t size, int days)
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{
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size_t offset = 0;
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buf[0] = '\0';
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for (int i = 0; i < days && offset < size - 1; i++) {
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char date_str[16];
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get_date_str(date_str, sizeof(date_str), i);
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char path[64];
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snprintf(path, sizeof(path), "%s/%s.md", MIMI_SPIFFS_MEMORY_DIR, date_str);
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FILE *f = fopen(path, "r");
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if (!f) continue;
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if (offset > 0 && offset < size - 4) {
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offset += snprintf(buf + offset, size - offset, "\n---\n");
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}
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size_t n = fread(buf + offset, 1, size - offset - 1, f);
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offset += n;
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buf[offset] = '\0';
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fclose(f);
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}
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return ESP_OK;
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}
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