1 files changed, 90 insertions, 0 deletions
diff --git a/logging.c b/logging.c
new file mode 100644
index 0000000..e0f5f1f
--- /dev/null
+++ b/logging.c
@@ -0,0 +1,90 @@
+#include "logging.h"
+
+// Write the line 'str' to the relevant log file such as
+// '#channel.log' or 'nickname.log'.  'ournick' is our own
+// nick and is used to determine which log file to write to.
+// Expects a string in the format:
+// :from!bar@baz PRIVMSG to :hello world
+// With the ":foo!bar@baz "prefix being important.
+// Returns 1 on success or 0 on failure.
+int logprivmsg(char *str, char *ournick) {
+  // First, extract the "from" nick and the "to" nick or channel by splitting up the string
+
+  // Track which space-separated token within this response we're on
+  int counter = 0;
+  // Build array of each space-separated token (TODO - Use counter to stop splitting once we reach some reasonable value - i.e. once we're definitely past commands and into just free text)
+  char tokens[MAXTOKENS][MAXDATASIZE];
+  char *token;
+
+  // Split out the first three space-separated parts of the string, leaving the rest.
+  // This gets us the prefix (containing the "from" nick), the PRIVMSG command (not needed),
+  // and the "to" nick or channel.  Plus the rest of the string intact (which is the actual
+  // message).
+  for (int i = 0; i < 3; i++) {
+    // Try to split
+    if ((token = strsep(&str, " ")) == NULL) {
+      printf("Error splitting string for logging, exiting!\n");
+      exit(1);
+    }
+    // Copy into the token array (strlen + 1 to get the NULL terminator)
+    strncpy(tokens[i], token, strlen(token) + 1);
+    counter++;
+  }
+
+  // Extract the username from the prefix
+  extractnickfromprefix(tokens[0]);
+
+  // Remove the leading ":" from the real message
+  stripprefix(str);
+
+  // Build the log filename
+  char filename[MAXCHAR];
+  // If the message was sent to us, then log it in the sender's log file
+  if (strncmp(tokens[2], ournick, strlen(tokens[0])) == 0) {
+    snprintf(filename, MAXCHAR, "%s.log", tokens[0]);
+  } else {
+    // Otherwise log it in the "to" log file
+    snprintf(filename, MAXCHAR, "%s.log", tokens[2]);
+  }
+
+  printf("logprivmsg(): Logging from '%s' to '%s' message '%s' in filename '%s'.\n", tokens[0], tokens[2], str, filename);
+
+  FILE *fp;
+  char line[MAXCHAR];
+
+  int bytes = 0;
+
+  fp = fopen(filename, "a");
+
+  if (fp == NULL) {
+    printf("error: could not open log file '%s' for writing.\n", filename);
+    exit(1);
+  }
+
+  // Get a current time string to prepend - TODO - Make this customisable.
+  time_t rawtime;
+  struct tm * timeinfo;
+  time(&rawtime);
+  timeinfo = localtime(&rawtime);
+  // Strip the trailing newline
+  char timestr[MAXCHAR];
+  snprintf(timestr, MAXCHAR, "%s", asctime(timeinfo));
+  timestr[strlen(timestr) - 1] = '\0';
+
+  // Prepend the time string and "from" nick
+  if (!snprintf(line, MAXCHAR, "%s <%s> %s", timestr, tokens[0], str)) {
+    fprintf(stderr, "Error while log string to write!\n");
+    exit(1);
+  }
+
+  printf("Complete 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 log file.\n");
+    exit(1);
+  }
+
+  fclose(fp);
+  return bytes;
+}