implement chat logging

src/log.c

@@ -0,0 +1,100 @@
+/*  ctx->log.c
+ *
+ *
+ *  Copyright (C) 2014 Toxic All Rights Reserved.
+ *
+ *  This file is part of Toxic.
+ *
+ *  Toxic is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Toxic is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Toxic.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "configdir.h"
+#include "toxic_windows.h"
+#include "misc_tools.h"
+
+/* gets the log path by appending to the config dir the name and first 4 chars of key */
+void init_logging_session(uint8_t *name, uint8_t *key, ChatContext *ctx)
+{
+    if (!ctx->log.log_on)
+        return;
+
+    char *user_config_dir = get_user_config_dir();
+    int path_len = strlen(user_config_dir) + strlen(CONFIGDIR) + strlen(name) + (KEY_IDENT_DIGITS * 2) + 5;
+
+    if (path_len > MAX_STR_SIZE)
+        return;
+
+    uint8_t ident[KEY_IDENT_DIGITS*2+1];
+    sprintf(&ident[0], "%02X", key[0] & 0xff);
+    sprintf(&ident[2], "%02X", key[2] & 0xff);
+    ident[KEY_IDENT_DIGITS*2+1] = '\0';
+
+    snprintf(ctx->log.log_path, MAX_STR_SIZE, "%s%s%s-%s.log", user_config_dir, CONFIGDIR, name, ident);
+
+    FILE *logfile = fopen(ctx->log.log_path, "a");
+
+    if (logfile == NULL) {
+        ctx->log.log_on = false;
+        return;
+    }
+
+    fprintf(logfile, "\n***NEW SESSION***\n\n");
+
+    fclose(logfile);
+    free(user_config_dir);
+}
+
+/* writes contents from a chatcontext's log buffer to respective log file and resets log pos.
+   This is triggered when the log buffer is full, but may be forced. */
+void write_to_log(ChatContext *ctx)
+{
+    if (!ctx->log.log_on)
+        return;
+
+    FILE *logfile = fopen(ctx->log.log_path, "a");
+
+    if (logfile == NULL) {
+        ctx->log.log_on = false;
+        return;
+    }
+
+    int i;
+
+    for (i = 0; i < ctx->log.pos; ++i)
+        fprintf(logfile, "%s", ctx->log.log_buf[i]);
+
+    ctx->log.pos = 0;
+    fclose(logfile);
+}
+
+/* Adds msg to log_buf with timestamp and name. 
+   If buf is full, triggers write_to_log (which sets buf pos to 0) */
+void add_to_log_buf(uint8_t *msg, uint8_t *name, ChatContext *ctx)
+{
+    if (!ctx->log.log_on)
+        return;
+
+    struct tm *tminfo = get_time();
+    snprintf(ctx->log.log_buf[ctx->log.pos], MAX_LOG_LINE_SIZE, "%04d/%02d/%02d [%02d:%02d:%02d] %s: %s\n", 
+                                  tminfo->tm_year + 1900, tminfo->tm_mon + 1, tminfo->tm_mday, 
+                                  tminfo->tm_hour, tminfo->tm_min, tminfo->tm_sec, name, msg);
+
+    if (++(ctx->log.pos) >= MAX_LOG_BUF_LINES)
+        write_to_log(ctx);
+}