+
+/*
+ * Parse the office hour strings in the configuration file
+ * to fill out the hours array (in seconds)
+ */
+
+static ngx_uint_t ** parse_office_hours(ngx_array_t * office_hours)
+{
+
+ ngx_str_t *hours;
+ ngx_uint_t ** parsed_office_hours;
+ ngx_uint_t i, j;
+
+ parsed_office_hours = malloc(7 * sizeof(ngx_uint_t *));
+
+ hours = office_hours->elts;
+
+ /*
+ * On the configuration file, the leftmost element
+ * always applies to all remaining days, all others
+ * are read from right to left. So first we will apply
+ * the initial override, and then iterate based on the
+ * number of overrides
+ */
+
+ for (i = 0; i < WEEK_LENGTH + 1 - office_hours->nelts; ++i) {
+ parsed_office_hours[i] = parse_office_hours_string(hours[0]);
+ }
+
+ for (i = 1; i < office_hours->nelts; ++i) {
+ j = WEEK_LENGTH - office_hours->nelts + i;
+ parsed_office_hours[j] = parse_office_hours_string(hours[i]);
+ }
+
+ return parsed_office_hours;
+}
+
+/*
+ * Given a time string or the closed token, return a tuple
+ * of numbers representing opening and closing hours
+ */
+
+static ngx_uint_t * parse_office_hours_string(ngx_str_t office_hours)
+{
+
+ ngx_uint_t * parsed_hours;
+
+ parsed_hours = malloc(2 * sizeof(ngx_uint_t));
+
+ if(ngx_strcmp(office_hours.data, CLOSED_TOKEN) == 0) {
+ parsed_hours[0] = 0;
+ parsed_hours[1] = 0;
+ return parsed_hours;
+ }
+
+ parsed_hours[0] = 0;
+ parsed_hours[1] = 86400;
+ return parsed_hours;
+}
+
+/*
+ * Given an office hours array, it returns whether or not
+ * it is currently within office hours.
+ */
+
+static ngx_flag_t within_office_hours(ngx_uint_t ** office_hours)
+{
+
+ time_t now;
+ ngx_uint_t day_of_week, seconds_of_day;
+ ngx_uint_t * current_hours;
+
+ ngx_time_update();
+ now = ngx_time();
+ day_of_week = get_day_of_week(now);
+ seconds_of_day = get_seconds_of_day(now);
+ current_hours = office_hours[day_of_week];
+
+ return seconds_of_day >= current_hours[0] && seconds_of_day <= current_hours[1];
+}
+
+/*
+ * Calculate the day of the week given a timestamp
+ */
+static ngx_uint_t get_day_of_week(time_t time)
+{
+
+ /* Epoch was thursday, so add 3 so we start on monday */
+ return (time / 86400 + 3) % 7;
+}
+
+/*
+ * Calculate the number of seconds elapsed today
+ */
+static ngx_uint_t get_seconds_of_day(time_t time)
+{
+
+ return time - (time / 86400) * 86400;
+}