From 5d34ac70aab7e23fcf871c84ee1a230e4f9ded83 Mon Sep 17 00:00:00 2001
From: "me@ow.nekobit.net" <me@ow.nekobit.net>
Date: Fri, 25 Feb 2022 20:26:41 +0000
Subject: [PATCH] Regex stuff

FossilOrigin-Name: 6ed1d24098367d00abf2401fc05e9f4c8c101d90a4a7fb5d8f611a8a029539c0
---
 src/reply.c  | 46 +++++++++++++++++++++++++++++++++++++---------
 src/reply.h  |  5 +----
 src/status.c |  2 --
 3 files changed, 38 insertions(+), 15 deletions(-)

diff --git a/src/reply.c b/src/reply.c
index 5b99e89..e44a105 100644
--- a/src/reply.c
+++ b/src/reply.c
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#include <regex.h>
 #include <stdlib.h>
 #include <string.h>
 #include "reply.h"
@@ -44,30 +45,57 @@ char* construct_post_box(char* reply_id,
     return reply_html;
 }
 
-char* reply_status(char* id,
-                   struct mstdnt_status* statuses_before,
-                   size_t before_len,
-                   struct mstdnt_status* status)
-{
-    char* stat_reply;
+#define REGEX_REPLY "<a class=\"u-url mention\".*href=\"https:\\/\\/(.*)\\/.*\".*>@<span>(.*)<\\/span>"
+//#define REGEX_REPLY "<a class=\"u-url mention\".*href=\"https:\\/\\/(.*)\\/.*\".*>@<span>(.*)<\\/span>"
 
+char* reply_status(char* id, struct mstdnt_status* status)
+{
+    char* content = status->content;
+    char* stat_reply;
+    // Regex
+    regex_t regex;
+    regmatch_t pmatch[2];
+    regoff_t off_url, len_url, off_name, len_name;
+    
     // Replies
     size_t replies_size, replies_size_orig;
     char* replies = malloc(replies_size = strlen(status->account.acct)+2);
+
+    // Load first reply
     replies[0] = '@';
     strcpy(replies+1, status->account.acct);
     replies[replies_size-1] = ' ';
 
-    for (int i = before_len-1; i >= 1; --i)
+    // Compile regex
+    if (regcomp(&regex, REGEX_REPLY, REG_EXTENDED))
     {
+        fputs("Invalid regex!", stderr);
+        free(replies);
+    }
+
+    int j = 0;
+    
+    for (int i = 0;; ++i)
+    {
+        if (regexec(&regex, content + j, 2, pmatch, 0))
+            break;
+
+        off_url = pmatch[0].rm_so + j;
+        len_url = pmatch[0].rm_eo - pmatch[0].rm_so;
+
+        off_name = pmatch[1].rm_so + j;
+        len_name = pmatch[1].rm_eo - pmatch[1].rm_so;
+
         replies_size_orig = replies_size;
-        replies_size += strlen(statuses_before[i].account.acct)+2;
+        replies_size += len_url+2;
 
         // Realloc string
         replies = realloc(replies, replies_size+1);
+
+        j += off_url + len_url + off_name + len_name;
         
         replies[replies_size_orig] = '@';
-        strcpy(replies + replies_size_orig + 1, statuses_before[i].account.acct);
+        memcpy(replies + replies_size_orig + 1, content + off_url, len_url);
         replies[replies_size-1] = ' ';
 
     }
diff --git a/src/reply.h b/src/reply.h
index 09c8629..44e37a9 100644
--- a/src/reply.h
+++ b/src/reply.h
@@ -24,10 +24,7 @@ char* construct_post_box(char* reply_id,
                          char* default_content,
                          int* size);
 
-char* reply_status(char* id,
-                   struct mstdnt_status* statuses_before,
-                   size_t before_len,
-                   struct mstdnt_status* status);
+char* reply_status(char* id, struct mstdnt_status* status);
 
 
 #endif // REPLY_H
diff --git a/src/status.c b/src/status.c
index 1aff811..b9939de 100644
--- a/src/status.c
+++ b/src/status.c
@@ -164,8 +164,6 @@ void content_status(mastodont_t* api, char** data, size_t data_size, int is_repl
     if (is_reply)
     {
         stat_reply = reply_status(data[0],
-                                  statuses_before,
-                                  stat_before_len,
                                   &status);
     }