From e3e7618f6dfc0ae997042cb22d9eee1dd8e19678 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Tue, 30 Oct 2018 10:39:55 +0100
Subject: input_gadgets.c: parse date & time of fh temperature instead of
 copying fields

---
 input_gadgets.c | 41 +++++++++++++++++++----------------------
 1 file changed, 19 insertions(+), 22 deletions(-)

(limited to 'input_gadgets.c')

diff --git a/input_gadgets.c b/input_gadgets.c
index df0abe1..292a112 100644
--- a/input_gadgets.c
+++ b/input_gadgets.c
@@ -12,7 +12,7 @@
 
 #include "input_gadgets.h"
 
-#define fh_temperature_regex   "<strong>\\s*\n\\s*Wetterdaten vom ([0-9]{2})\\.([0-9]{2})\\.([0-9]{4}) um ([0-9:]{5}) MEZ</strong>(.|\n)*>Temperatur</td>\\s*\n\\s*<td [^>]*><strong>([^<]*)</strong>"
+#define fh_temperature_regex   "<strong>\\s*\n\\s*Wetterdaten vom ([0-9]{2}\\.[0-9]{2}\\.[0-9]{4} um [0-9]{2}:[0-9]{2} MEZ)</strong>(.|\n)*>Temperatur</td>\\s*\n\\s*<td [^>]*><strong>([^<]*)</strong>"
 #define wetter_warnung_filename_regex "^2\\.49\\.0\\.1\\.276\\.0\\.DWD\\.PVW\\.([0-9]+)\\."
 #define warnings_future_timespan  (60*60*10)
 
@@ -153,15 +153,13 @@ char *gadgets_retrieve_current_temperature(char *output, int max_len)
   }
 
   regex_t re;
-  regmatch_t rm[7];
-  if (regcomp(&re, fh_temperature_regex, REG_EXTENDED|REG_NEWLINE) != 0)
-  {
+  regmatch_t rm[4];
+  if (regcomp(&re, fh_temperature_regex, REG_EXTENDED|REG_NEWLINE) != 0) {
     fprintf(stderr, "Failed to compile regex '%s'\n", fh_temperature_regex);
     free(chunk.memory);
     return NULL;
   }
-  if (ret_val = regexec(&re, chunk.memory, 7, rm, 0))
-  {
+  if (ret_val = regexec(&re, chunk.memory, 4, rm, 0)) {
     char *reg_err;
     reg_err = malloc(1024);
     regerror(ret_val, &re, reg_err, 1024);
@@ -171,25 +169,24 @@ char *gadgets_retrieve_current_temperature(char *output, int max_len)
     return NULL;
   }
   regfree(&re);
-  char* ende;
+  char* ende = output;
   if (max_len > 0) {
-    int i = snprintf(output, max_len, "%.*s (%.*s %.*s-%.*s-%.*s)",
-      (int)(rm[6].rm_eo - rm[6].rm_so), (char*)(chunk.memory + rm[6].rm_so),
-      (int)(rm[4].rm_eo - rm[4].rm_so), (char*)(chunk.memory + rm[4].rm_so),
-      (int)(rm[3].rm_eo - rm[3].rm_so), (char*)(chunk.memory + rm[3].rm_so),
-      (int)(rm[2].rm_eo - rm[2].rm_so), (char*)(chunk.memory + rm[2].rm_so),
-      (int)(rm[1].rm_eo - rm[1].rm_so), (char*)(chunk.memory + rm[1].rm_so)
+    struct tm time_struct;
+    if (strptime((char*)(chunk.memory + rm[1].rm_so),"%d.%m.%Y um %H:%M MEZ",&time_struct) == NULL) {
+      fprintf(stderr, "Failed to parse time '%.*s'\n", (int)(rm[1].rm_eo - rm[1].rm_so), (char*)(chunk.memory + rm[1].rm_so));
+      free(chunk.memory);
+      return NULL;
+    }
+    time_struct.tm_isdst = 0; // the fh gives CET all the time
+    mktime(&time_struct);
+    ende += snprintf(output, max_len, "%.*s",
+      (int)(rm[3].rm_eo - rm[3].rm_so), (char*)(chunk.memory + rm[3].rm_so) // temperature
     );
-    ende = output + i;
-    for (; i>=0; i--)
-      if (output[i] == '(')
-        break;
-    for (; i>=0; i--)
-      if (output[i] == '.')
-        output[i] = ',';
+    for (char *i = output; i < ende; i++)
+      if (*i == '.')
+        *i = ',';
+    ende += strftime(ende, output + max_len - ende, " (%m-%d %H:%M)", &time_struct);
   }
-  else
-    ende = output;
   free(chunk.memory);
   return ende;
 }
-- 
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