Allow user to load variables from different places

cloudflare-templatev6.sh

@@ -1,6 +1,16 @@
 #!/bin/bash
 ## change to "bin/sh" when necessary
 
+display_help(){
+  logger "Usage: $0 [local|file|pass]"
+  logger "  local - Load variables from this script"
+  logger "  file  - Load variables from a file"
+  logger "  pass  - Load variables from pass"
+}
+
+load_variables(){
+  case "$1" in
+    "local")
         ##############  CLOUDFLARE CREDENTIALS  ##############
         # @auth_email           - The email used to login 'https://dash.cloudflare.com'
         # @auth_method          - Set to "global" for Global API Key or "token" for Scoped API Token
@@ -44,20 +54,46 @@ sitename=""
         slackchannel=""
         slackuri=""
         discorduri=""
+      ;;
+    "file")
+        # Load variables from file
+        CONFIG_FILE="$HOME/.cloudflare/config6.ini"
+
+        # Check if the configuration file exists
+        if [ -f "$CONFIG_FILE" ]; then
+            # Load configuration from the file
+            source "$CONFIG_FILE"
+        else
+            logger "Error: Configuration file '$CONFIG_FILE' not found."
+            exit 1
+        fi
+        ;;
+    "pass")
+        # Load variables from pass
+        source <(pass credentials/cloudflare)
+        ;;
+    *)
+        logger "Invalid load_variables option"
+        exit 1
+        ;;
+  esac
+}
 
+validate_variables(){
+  # Validate required variables
+  if [[ -z $auth_email || -z $auth_key || -z $zone_identifier || -z $record_name ]]; then
+    logger "Missing required variables. Please provide values for 'auth_email', 'auth_key', 'zone_identifier', and 'record_name'."
+    exit 1
+  fi
+}
 
 
-################################################
-## Make sure we have a valid IPv6 connection
-################################################
+check_ipv6_is_available(){
     if ! { curl -6 -s --head --fail https://ipv6.google.com >/dev/null; }; then
         logger -s "$log_header_name: Unable to establish a valid IPv6 connection to a known host."
         exit 1
     fi
 
-################################################
-## Finding our IPv6 address
-################################################
     # Regex credits to https://stackoverflow.com/a/17871737
     ipv6_regex="(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))"
 
@@ -87,36 +123,29 @@ if [[ ! $ip =~ ^$ipv6_regex$ ]]; then
         logger -s "$log_header_name: Failed to find a valid IPv6 address."
         exit 1
     fi
+}
 
-################################################
-## Check and set the proper auth header
-################################################
+set_auth_headers(){
     if [[ "${auth_method}" == "global" ]]; then
         auth_header="X-Auth-Key:"
     else
         auth_header="Authorization: Bearer"
     fi
+}
 
-################################################
-## Seek for the AAAA record
-################################################
+check_if_aaaa_record_exists(){
     logger "$log_header_name: Check Initiated"
     record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?type=AAAA&name=$record_name" \
         -H "X-Auth-Email: $auth_email" \
         -H "$auth_header $auth_key" \
         -H "Content-Type: application/json")
-
-################################################
-## Check if the domain has an AAAA record
-################################################
     if [[ $record == *"\"count\":0"* ]]; then
         logger -s "$log_header_name: Record does not exist, perhaps create one first? (${ip} for ${record_name})"
         exit 1
     fi
+}
 
-################################################
-## Get existing IP
-################################################
+get_current_ip_from_cloudflare(){
     old_ip=$(echo "$record" | sed -E 's/.*"content":"'${ipv6_regex}'".*/\1/')
 
     # Make sure the extracted IPv6 address is valid
@@ -130,24 +159,18 @@ if [[ $ip == $old_ip ]]; then
         logger "$log_header_name: IP ($ip) for ${record_name} has not changed."
         exit 0
     fi
+}
 
-################################################
-## Set the record identifier from result
-################################################
+update_ip_on_cloudflare(){
     record_identifier=$(echo "$record" | sed -E 's/.*"id":"([A-Za-z0-9_]+)".*/\1/')
-
-################################################
-## Change the IP@Cloudflare using the API
-################################################
     update=$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" \
         -H "X-Auth-Email: $auth_email" \
         -H "$auth_header $auth_key" \
         -H "Content-Type: application/json" \
         --data "{\"content\":\"$ip\",\"ttl\":\"$ttl\",\"proxied\":$proxy}")
+}
 
-################################################
-## Report the status
-################################################
+send_webhooks(){
     case "$update" in
     *"\"success\":false"*)
         echo -e "$log_header_name: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS:\n$update" | logger -s
@@ -184,3 +207,26 @@ case "$update" in
         exit 0
         ;;
     esac
+}
+
+main(){
+    validate_variables
+    check_ipv6_is_available
+    set_auth_headers
+    check_if_aaaa_record_exists
+    get_current_ip_from_cloudflare
+    update_ip_on_cloudflare
+    send_webhooks
+}
+
+# switch for environment variables loading
+case "$1" in
+    "local"|"file"|"pass")
+        load_variables "$1"
+        main
+        ;;
+    *)
+        display_help
+        exit 1
+        ;;
+esac