Shorten URLs in CSV preview

(links still work)

webtool/lib/template_filters.py

@@ -1,5 +1,7 @@
 import urllib.parse
 import datetime
+from math import floor
+
 import markdown
 import json
 import ural
@@ -120,7 +122,7 @@ def _jinja2_filter_httpquery(data):
 		return ""
 
 @app.template_filter("add_ahref")
-def _jinja2_filter_add_ahref(content):
+def _jinja2_filter_add_ahref(content, ellipsiate=0):
 	"""
 	Add HTML links to text
 
@@ -135,7 +137,11 @@ def _jinja2_filter_add_ahref(content):
 		return content
 
 	for link in set(ural.urls_from_text(str(content))):
-		content = content.replace(link, f'<a href="{link.replace("<", "%3C").replace(">", "%3E").replace(chr(34), "%22")}" rel="external">{link}</a>')
+		if ellipsiate > 0:
+			link_text = _jinja2_filter_ellipsiate(link, ellipsiate, True, "[&hellip;]")
+		else:
+			link_text = link
+		content = content.replace(link, f'<a href="{link.replace("<", "%3C").replace(">", "%3E").replace(chr(34), "%22")}" rel="external">{link_text}</a>')
 
 	return content
 
@@ -200,6 +206,30 @@ def _jinja2_filter_extension_to_noun(ext):
 	else:
 		return "item"
 
+@app.template_filter("ellipsiate")
+def _jinja2_filter_ellipsiate(text, length, inside=False, ellipsis_str="&hellip;"):
+	if len(text) <= length:
+		return text
+
+	elif not inside:
+		return text[:length] + ellipsis_str
+
+	else:
+		# two cases: URLs and normal text
+		# for URLs, try to only ellipsiate after the domain name
+		# this makes the URLs easier to read when shortened
+		if ural.is_url(text):
+			pre_part = "/".join(text.split("/")[:3])
+			if len(pre_part) < length - 6:  # kind of arbitrary
+				before = len(pre_part) + 1
+			else:
+				before = floor(length / 2)
+		else:
+			before = floor(length / 2)
+
+		after = len(text) - before
+		return text[:before] + ellipsis_str + text[after:]
+
 @app.template_filter('4chan_image')
 def _jinja2_filter_4chan_image(image_4chan, post_id, board, image_md5):
 

webtool/templates/preview/csv.html

@@ -20,7 +20,7 @@
                 {% endif %}
             {% endif %}
             <t{% if outer_loop.index == 1 %}h{% else %}d{% endif %}>
-                {{ cell|e|add_ahref|safe }}
+                {{ cell|e|add_ahref(ellipsiate=50)|safe }}
             </t{% if outer_loop.index == 1 %}h{% else %}d{% endif %}>
         {% endfor %}
         </tr>