1 files changed, 116 insertions, 0 deletions

diff --git a/format.c b/format.c
new file mode 100644
index 0000000..b5d4cf7
--- /dev/null
+++ b/format.c
@@ -0,0 +1,116 @@
+/* snac - A simple, minimalistic ActivityPub instance */
+/* copyright (c) 2022 grunfink - MIT license */
+
+#include "xs.h"
+#include "xs_regex.h"
+
+#include "snac.h"
+
+d_char *not_really_markdown(char *content, d_char **f_content)
+/* formats a content using some Markdown rules */
+{
+    d_char *s = NULL;
+    int in_pre = 0;
+    int in_blq = 0;
+    xs *list;
+    char *p, *v;
+    xs *wrk = xs_str_new(NULL);
+
+    {
+        /* split by special markup */
+        xs *sm = xs_regex_split(content,
+            "(`[^`]+`|\\*\\*?[^\\*]+\\*?\\*|https?:/" "/[^[:space:]]+)");
+        int n = 0;
+
+        p = sm;
+        while (xs_list_iter(&p, &v)) {
+            if ((n & 0x1)) {
+                /* markup */
+                if (xs_startswith(v, "`")) {
+                    xs *s1 = xs_crop(xs_dup(v), 1, -1);
+                    xs *s2 = xs_fmt("<code>%s</code>", s1);
+                    wrk = xs_str_cat(wrk, s2);
+                }
+                else
+                if (xs_startswith(v, "**")) {
+                    xs *s1 = xs_crop(xs_dup(v), 2, -2);
+                    xs *s2 = xs_fmt("<b>%s</b>", s1);
+                    wrk = xs_str_cat(wrk, s2);
+                }
+                else
+                if (xs_startswith(v, "*")) {
+                    xs *s1 = xs_crop(xs_dup(v), 1, -1);
+                    xs *s2 = xs_fmt("<i>%s</i>", s1);
+                    wrk = xs_str_cat(wrk, s2);
+                }
+                else
+                if (xs_startswith(v, "http")) {
+                    xs *s1 = xs_fmt("<a href=\"%s\">%s</a>", v, v);
+                    wrk = xs_str_cat(wrk, s1);
+                }
+                else
+                    /* what the hell is this */
+                    wrk = xs_str_cat(wrk, v);
+            }
+            else
+                /* surrounded text, copy directly */
+                wrk = xs_str_cat(wrk, v);
+
+            n++;
+        }
+    }
+
+    /* now work by lines */
+    p = list = xs_split(wrk, "\n");
+
+    s = xs_str_new(NULL);
+
+    while (xs_list_iter(&p, &v)) {
+        xs *ss = xs_strip(xs_dup(v));
+
+        if (xs_startswith(ss, "```")) {
+            if (!in_pre)
+                s = xs_str_cat(s, "<pre>");
+            else
+                s = xs_str_cat(s, "</pre>");
+
+            in_pre = !in_pre;
+            continue;
+        }
+
+        if (xs_startswith(ss, ">")) {
+            /* delete the > and subsequent spaces */
+            ss = xs_strip(xs_crop(ss, 1, 0));
+
+            if (!in_blq) {
+                s = xs_str_cat(s, "<blockquote>");
+                in_blq = 1;
+            }
+
+            s = xs_str_cat(s, ss);
+            s = xs_str_cat(s, "<br>");
+
+            continue;
+        }
+
+        if (in_blq) {
+            s = xs_str_cat(s, "</blockquote>");
+            in_blq = 0;
+        }
+
+        s = xs_str_cat(s, ss);
+        s = xs_str_cat(s, "<br>");
+    }
+
+    if (in_blq)
+        s = xs_str_cat(s, "</blockquote>");
+    if (in_pre)
+        s = xs_str_cat(s, "</pre>");
+
+    /* some beauty fixes */
+    s = xs_replace_i(s, "</blockquote><br>", "</blockquote>");
+
+    *f_content = s;
+
+    return *f_content;
+}