Implement relay log writing.

1 files changed, 44 insertions, 2 deletions

diff --git a/replay.c b/replay.c
index 8c37d4c..36817fb 100644
--- a/replay.c
+++ b/replay.c
@@ -154,7 +154,8 @@ int relaylines(int seconds) {
 
   if (fp == NULL) {
     printf("error: could not open replay log '%s'.\n", filename);
-    exit(1);
+    // Assume the file just doesn't exist yet - TODO - Interpret error codes to see what happened.
+    return 0;
   }
 
   // Get the current time for comparison later
@@ -196,7 +197,7 @@ int readrelayline(int seconds, int linenum, char *str) {
 
   if (fp == NULL) {
     printf("error: could not open replay log '%s'.\n", filename);
-    return 1;
+    exit(1);
   }
 
   // Get the current time for comparison later
@@ -229,3 +230,44 @@ int readrelayline(int seconds, int linenum, char *str) {
   // If we got here something went wrong
   return 0;
 }
+
+// Write the line 'str' to the relay log file after prepending it with
+// the current unixtime timestamp.
+// Expects a string in the format:
+// :foo!bar@baz PRIVMSG foo :[17:41:41] hello world
+// With the ":foo!bar@baz "prefix being important.
+// Returns 1 on success or 0 on failure.
+int writerelayline(char *str) {
+  FILE *fp;
+  char line[MAXCHAR];
+  char* filename = "replay.log";
+
+  int bytes = 0;
+
+  fp = fopen(filename, "a");
+
+  if (fp == NULL) {
+    printf("error: could not open replay log '%s' for writing.\n", filename);
+    exit(1);
+  }
+
+  // Get the current time and manipulate it into a C string
+  time_t timenow = time(NULL);
+  int timenowlen = snprintf(NULL, 0, "%ld", timenow);
+  char timenowstr[timenowlen + 1]; // TODO - Make this Year 2038 proof.
+  snprintf(timenowstr, timenowlen + 1, "%ld", timenow);
+
+  // Prepend the unixtime timestamp
+  snprintf(line, MAXCHAR, "%s %s", timenowstr, str);
+
+  printf("Complete replay log string to write: '%s', length '%ld'.\n", line, strlen(line));
+
+  // Write complete line to file
+  if ((bytes = fprintf(fp, line)) < 0) {
+    printf("error: could not write to replay log file.\n");
+    exit(1);
+  }
+
+  fclose(fp);
+  return bytes;
+}