From 5228e61a0ef00e4731c0d0de9e7f468c5da9405f Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 13 Aug 2022 09:05:53 +0530
Subject: [PATCH] Content server: Fix formatting of dates for custom columns
 using ISO format. Fixes #1986412 [Content Server: iso date format break in
 book details page](https://bugs.launchpad.net/calibre/+bug/1986412)

---
 src/pyj/date.pyj | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/pyj/date.pyj b/src/pyj/date.pyj
index c5d0730173..26cfe8b408 100644
--- a/src/pyj/date.pyj
+++ b/src/pyj/date.pyj
@@ -132,6 +132,20 @@ def am_pm_pat():
     return ans
 
 
+def as_iso(date):
+    tzo = -date.getTimezoneOffset()
+    dif = '+' if tzo >= 0 else '-'
+
+    def pad(num):
+          return ('0' if num < 10 else '') + num
+
+    return (
+        date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' + pad(date.getDate()) + ' ' + pad(date.getHours()) +
+        ':' + pad(date.getMinutes()) + ':' + pad(date.getSeconds()) + dif + pad(Math.floor(Math.abs(tzo) / 60)) +
+        ':' + pad(Math.abs(tzo) % 60)
+    )
+
+
 def format_date(date=None, fmt='dd MMM yyyy', as_utc=False):
     fmt = fmt or 'dd MMM yyyy'
     ampm = am_pm_pat().test(fmt)
@@ -140,6 +154,8 @@ def format_date(date=None, fmt='dd MMM yyyy', as_utc=False):
     date = date or Date()
     if is_date_undefined(date):
         return ''
+    if fmt is 'iso':
+        return as_iso(date)
     return fmt.replace(fmt_date_pat(), def(match):
         if not match:
             return ''