add argument consumption for better journal messages

src/journal/emotion.c

@@ -4,7 +4,8 @@
 
 void handle_emotion(FILE *journal, char* msg)
 {
-    // TODO: add newline to msg
-    journal_write(journal, msg);
+    char formatted[512];
+    sprintf(formatted, "%s\n", msg);
+    journal_write(journal, formatted);
     return;
 }

src/journal/main.c

@@ -1,11 +1,51 @@
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "emotion.h"
 #include "journal.h"
 
 #define TOPICS 10
 
+// go through all elements of argv[2] and beyond
+// and join them together in a string
+char *extract_handler_msg(int argc, char **argv)
+{
+    int cur = 0;
+
+    // allocate an empty slot to start with.
+    char *res = malloc(cur);
+
+    // iterate through each argument
+    for(int i = 2; argv[i] != NULL; i++)
+    {
+        // catch it, get its length
+        char *word = argv[i];
+        int wordlen = strlen(word);
+
+        // increase the size of our current things by
+        // arg length + 1 (for a whitespace)
+        cur += wordlen;
+        res = realloc(res, cur + 1);
+
+        // only prepend our whitespace if we AREN'T
+        // at the first argument.
+        if(i != 2)
+        {
+            res[cur - wordlen] = ' ';
+            cur++;
+        }
+
+        // merge our current results with the current arg
+        for(int j = 0; j < wordlen; j++)
+        {
+            res[cur - wordlen + j] = word[j];
+        }
+    }
+
+    return res;
+}
+
 int main(int argc, char** argv)
 {
     if(argc < 2)
@@ -15,7 +55,6 @@ int main(int argc, char** argv)
     }
 
     char *topic = argv[1];
-    printf("load topic %s\n", topic);
 
     const char* topics[TOPICS] = {
         "emotion"
@@ -25,7 +64,16 @@ int main(int argc, char** argv)
         handle_emotion,
     };
 
-    for(int i = 0; i < TOPICS; i++)
+    if(strcmp(topic, "list") == 0)
+    {
+        // list all topics
+        for(int i = 0; topics[i] != NULL; i++)
+            printf("%s ", topics[i]);
+        printf("\n");
+        return 0;
+    }
+
+    for(int i = 0; topics[i] != NULL; i++)
     {
         const char* cur_topic = topics[i];
 
@@ -34,9 +82,16 @@ int main(int argc, char** argv)
             void (*fun_ptr)(FILE*, char*) = handlers[i];
 
             FILE* journal_file = journal_open(topic);
-            fun_ptr(journal_file, "hello world");
+
+            char *handler_message = extract_handler_msg(argc, argv);
+            printf("'%s'\n", handler_message);
+
+            // the joined args[2] and beyond come as the
+            // second argument
+            fun_ptr(journal_file, handler_message);
             journal_close(journal_file);
 
+            free(handler_message);
             printf("done\n");
             return 0;
         }