From 9ad176d854450b7474a4857dae76974249514dea Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Sun, 3 Sep 2017 00:34:13 +0530
Subject: Improve duplicate notice detection.

* apod-bot.sh: Use jq comparison to detect duplicate notice.
---
 apod-bot.sh | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/apod-bot.sh b/apod-bot.sh
index 67e3a04..81fc5c3 100755
--- a/apod-bot.sh
+++ b/apod-bot.sh
@@ -40,13 +40,9 @@ page_link=$apod_base_url/ap$date.html
 notice="$title $page_link $media_link"
 
 # Ensure we are not publishing a duplicate notice
-previous_notice=$(curl -sSu "$bot_username:$bot_password" $social_api_url/statuses/home_timeline.json \
-		      | jq -r '.[0] | .text')
-if [[ "$notice" = "$previous_notice" ]]
-then
-    echo "Notice \"$notice\" already published. Aborting..." >&2
-    exit 1
-fi
+curl -sSu "$bot_username:$bot_password" $social_api_url/statuses/home_timeline.json \
+    | jq -e --arg notice "$notice" '(.[0] | .text) != $notice' > /dev/null \
+    || (echo "Notice \"$notice\" already published. Aborting..." >&2 && exit 1)
 
 # Check image and page links exist
 wget --spider $media_link
-- 
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