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| -rw-r--r-- | apod-bot.sh | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/apod-bot.sh b/apod-bot.sh new file mode 100644 index 0000000..85acc1b --- /dev/null +++ b/apod-bot.sh @@ -0,0 +1,52 @@ +#! /usr/bin/bash -e + +# This work is in the public domain. +# +# It was completed by Arun I in 2016. +# +# Though you are not legally obliged to do so, I would appreciate it +# if you credit me for this work by not removing this notice, and +# hopefully linking to my blog post at +# https://systemreboot.net/post/nasa-astronomy-picture-of-the-day-bot-for-gnu-social +# +# To run this script, you will need jq, the command line JSON +# processor and pup, the command line HTML processor. + +SOCIAL_API_URL=https://social.systemreboot.net/api +BOT_USERNAME=apod +BOT_PASSWORD=secret-password-here + +APOD_BASE_URL=http://apod.nasa.gov/apod + +APOD_HTML=$(curl $APOD_BASE_URL/astropix.html) + +TITLE=$(echo "$APOD_HTML" | pup 'center:nth-child(2) > b:nth-child(1) text{}' \ + | sed -e 's/^ *//' -e 's/ *$//') +IMAGE_LINK=$APOD_BASE_URL/$(echo "$APOD_HTML" | pup -p 'img attr{src}') +YOUTUBE_VIDEO_ID=$(echo "$APOD_HTML" | pup 'iframe attr{src}' | awk -F/ '{print $5}' | awk -F? '{print $1}') +YOUTUBE_LINK="https://www.youtube.com/watch?v=$YOUTUBE_VIDEO_ID" +if [[ -z "$YOUTUBE_VIDEO_ID" ]] +then + MEDIA_LINK=$IMAGE_LINK +else + MEDIA_LINK=$YOUTUBE_LINK +fi +DATE=$(echo "$APOD_HTML" | pup ':contains("Discuss") attr{href}' | awk -F= '{print $2}') +PAGE_LINK=$APOD_BASE_URL/ap$DATE.html + +NOTICE="$TITLE $PAGE_LINK $MEDIA_LINK" + +PREVIOUS_NOTICE=$(curl -u "$BOT_USERNAME:$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 + +wget --spider $MEDIA_LINK +wget --spider $PAGE_LINK + +curl -u "$BOT_USERNAME:$BOT_PASSWORD" --data-urlencode "status=$NOTICE" \ + $SOCIAL_API_URL/statuses/update.json \ + | jq -r '"Published notice \"\(.text)\" on \(.created_at)"' |