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# Script for sending user defined updates using DO API
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# 2015 Artem Yakimenko <code at temik dot me>
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#
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# activated inside /etc/config/ddns by setting
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#
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# option update_script '/usr/lib/ddns/update_do.sh'
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#
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# the script is parsed (not executed) inside send_update() function
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# of /usr/lib/ddns/dynamic_dns_functions.sh
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# so you can use all available functions and global variables inside this script
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# already defined in dynamic_dns_updater.sh and dynamic_dns_functions.sh
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#
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# It make sence to define the update url ONLY inside this script
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# because it's anyway unique to the update script
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# otherwise it should work with the default scripts
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#
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# Options are passed from /etc/config/ddns:
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# Username - the record name DO Zone
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# Password - API Token
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# Domain - the domain managed by DO
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# Parm_opt - The Record ID in the DO API structure
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local __URL="https://api.digitalocean.com/v2/domains/[DOMAIN]/records/[RECORD_ID]"
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local __HEADER="Authorization: Bearer [PASSWORD]"
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local __HEADER_CONTENT="Content-Type: application/json"
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local __BODY='{"name":"[NAME]","data": "[IP]"}'
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# inside url we need username and password
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[ -z "$domain" ] && write_log 14 "Service section not configured correctly! Missing 'domain'"
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[ -z "$username" ] && write_log 14 "Service section not configured correctly! Missing 'Zone name in Username'"
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[ -z "$password" ] && write_log 14 "Service section not configured correctly! Missing 'password'"
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[ -z "$param_opt" ] && write_log 14 "Service section not configured correctly! Missing 'Zone ID in Optional Parameter'"
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# do replaces in URL, header and body:
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__URL=$(echo $__URL | sed -e "s#\[RECORD_ID\]#$param_opt#g" \
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-e "s#\[DOMAIN\]#$domain#g")
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__HEADER=$(echo $__HEADER| sed -e "s#\[PASSWORD\]#$password#g")
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__HEADER_CONTENT=$(echo $__HEADER_CONTENT)
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__BODY=$(echo $__BODY | sed -e "s#\[NAME\]#$username#g" -e "s#\[IP\]#$__IP#g")
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#Send PUT request
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curl -X PUT -H "$__HEADER_CONTENT" -H "$__HEADER" -d "$__BODY" "$__URL"
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write_log 7 "DDNS Provider answered:\n$(cat $DATFILE)"
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# analyse provider answers
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# If IP is contained in the returned datastructure - API call was sucessful
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grep -E "$__IP" $DATFILE >/dev/null 2>&1
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return $? # "0" if IP has been changed or no change is needed
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