first commit

1 files changed, 109 insertions, 0 deletions

diff --git a/agenda_entry.c b/agenda_entry.c
new file mode 100644
index 0000000..fa933c6
--- /dev/null
+++ b/agenda_entry.c
@@ -0,0 +1,109 @@
+#include "agenda_entry.h"
+
+char *next_word(char *str) { return strstr(str, " ")+1; }
+char *next_line(char *str) { return strstr(str, "\n")+1; }
+char *next_entry(char *str) {
+	char *tmp = strstr(str, "\n*");
+	if (tmp) tmp += 1;
+	return tmp; }
+
+entry read_agenda_entry(char *agenda) {
+	entry agenda_entry;
+	char *cursor = agenda;
+	char *lookahead, *tmp;
+	char *nextentry = next_entry(cursor);
+	if (nextentry == NULL)
+		nextentry = agenda + strlen(agenda) - 1;
+
+	while ((*cursor == '\n') ||
+		   (*cursor == '\t') ||
+		   (*cursor == ' '))
+		cursor++;
+	while (*(cursor++) == '*'); // trim the * out
+
+	//find out if there is a tag, and extract it
+	lookahead = strstr(cursor, ":\n");
+	if (lookahead && (lookahead < nextentry)) {
+		tmp = strstr(cursor, ":");
+		agenda_entry.tag = (char *)malloc(lookahead - tmp);
+		strncpy(agenda_entry.tag, tmp+1, lookahead - tmp - 1);
+		agenda_entry.tag[lookahead - tmp - 1] = '\0'; // here we're actually modifying lookahead-tmp cause the array is zero indexed
+		lookahead = tmp;
+	} else {
+		lookahead = strstr(cursor, "\n");
+		agenda_entry.tag = NULL;
+	}
+	agenda_entry.title = (char *)malloc(lookahead - cursor + 1);
+	strncpy(agenda_entry.title, cursor, lookahead - cursor);
+	agenda_entry.title[lookahead - cursor] = '\0';  // here we're actually modifying lookahead-cursor cause the array is zero indexed
+	
+	//find out if there is a deadline and extract it
+	cursor = next_line(cursor);
+	if (((lookahead = strstr(cursor, "DEADLINE:")) &&
+		 (lookahead < nextentry)) ||
+		((lookahead = strstr(cursor, "SCHEDULED:")) &&
+		 (lookahead < nextentry))) {
+        //there is a deadline or event is scheduled
+		tmp = strstr(lookahead, ">");
+		lookahead = strstr(lookahead, "<");
+		char *date = (char *)malloc(tmp - lookahead + 1);
+		strncpy(date, lookahead+1, tmp - lookahead - 1);
+		agenda_entry.date = extract_date(date);
+		free(date);
+	} else {
+		agenda_entry.date = (Date){ 0, 0, 0 };
+	}
+
+	return agenda_entry;
+}
+
+char *format_entry(entry e) {
+	char *ret = calloc(125, 1);
+	if (e.tag)
+		snprintf(ret, 124, "   * %s \t:%s:", e.title, e.tag);
+	else
+		snprintf(ret, 124, "   * %s", e.title);
+	return ret;
+}
+
+void sort_entry_array(entry *arr, int n) {
+	if (n == 1) return;
+
+	int halfway = n/2;
+	sort_entry_array(arr, halfway);
+	sort_entry_array(arr+halfway, n - halfway);
+
+	int i = 0,
+		j = halfway;
+	entry *tmp;
+	entry sw;
+	while ((i < j) && (j < n)) {
+		if (smaller(arr[i].date, arr[j].date))
+			i++;
+		else {
+			tmp = arr + j - 1;
+			while (tmp >= arr + i) {
+				sw = tmp[1];
+				tmp[1] = tmp[0];
+				tmp[0] = sw;
+				tmp--;
+			}
+			i++;
+			j++;
+		}
+	}
+}
+
+void print_entry(entry e) {
+	char *tmp = print_date_to_string(e.date);
+	printf("%s\n%s\n>%s\n",
+		   e.title,
+		   e.tag,
+		   tmp);
+	free(tmp);
+}
+
+void destroy_entry(entry e) {
+	free(e.tag);
+	free(e.title);
+}