feat: add dysfunctional busy line buttons

modules/voip/asterisk/default.nix

@@ -29,6 +29,7 @@ let
   extensionInfo = lib.mapAttrs (_ext: keys:
     let sample = allPhones.${lib.head keys}; in {
       inherit keys;
+      personKey   = sample.personKey;
       mailboxExt  = sample.mailboxExt;
       ringTimeout =
         if sample.personKey != null
@@ -272,6 +273,12 @@ let
           else "exten => ${ext},1,Dial(${dialStr},${toString info.ringTimeout})"
       ) extensionInfo)
 
+    # BLF hints for person extensions
+    + "\n" + lib.concatStringsSep "\n" (lib.mapAttrsToList (ext: info:
+        lib.optionalString (info.personKey != null)
+          "exten => ${ext},hint,${lib.concatStringsSep "&" (map (k: "PJSIP/${k}") info.keys)}"
+      ) extensionInfo)
+
     # Page and app extensions from cfg.extensions
     + "\n" + lib.concatStringsSep "\n" (lib.mapAttrsToList (ext: extCfg:
         if extCfg.mode == "page"

modules/voip/provisioning/default.nix

@@ -43,9 +43,16 @@ pkgs.linkFarm "voip-tftp-root" (
         familyLineEnabled = hasTrunk && phone.personKey != null && phone.sharedLine;
         intercomLineIndex = if familyLineEnabled then 3 else 2;
 
+        # BLF targets: all persons except the one owning this phone
+        blfPersons = lib.filter (p: p.extension != phone.extension)
+          (lib.mapAttrsToList (_: person: {
+            inherit (person) extension displayName;
+          }) cfg.persons);
+
         files = t.mkFiles ({
           mac           = key;
           inherit (phone) label password displayName;
+          inherit blfPersons;
           serverAddress = cfg.serverAddress;
           ntpServer     = cfg.ntpServer;
           sipPort       = cfg.sipPort;

modules/voip/provisioning/templates/cisco-8961.nix

@@ -23,6 +23,7 @@ in {
     , hasTrunk           ? false
     , hasIntercomButton  ? false
     , pageExtension      ? null
+    , blfPersons         ? []
     }:
     let
       # Line button assignments:
@@ -30,6 +31,7 @@ in {
       #   button 2 / lineIndex 2 — family L2 line       (when familyLineEnabled)
       #   button N / lineIndex N — intercom              (when intercomEnabled; N = 2 or 3)
       intercomButton = if familyLineEnabled then 3 else 2;
+      firstBlfButton = 1 + (if familyLineEnabled then 1 else 0) + (if intercomEnabled then 1 else 0) + 1;
 
       dialplanFile = cisco.dialplanFilename mac;
 
@@ -173,7 +175,14 @@ in {
                   <busyTrigger>1</busyTrigger>
                   <contact>${mac}-intercom</contact>
                </line>
-      '' else ""}      </sipLines>
+      '' else ""}${lib.concatImapStrings (i: p: ''
+               <line button="${toString (firstBlfButton + i - 1)}">
+                  <featureID>21</featureID>
+                  <featureLabel>${p.displayName}</featureLabel>
+                  <featureOptionMask>1</featureOptionMask>
+                  <speedDialNumber>${p.extension}</speedDialNumber>
+               </line>
+      '') blfPersons}      </sipLines>
             <voipControlPort>${toString sipPort}</voipControlPort>
             <startMediaPort>16348</startMediaPort>
             <stopMediaPort>20134</stopMediaPort>
@@ -253,7 +262,7 @@ in {
       # as digits match a pattern with timeout="0", or after the timeout for
       # timeout > 0.  Explicit patterns must come before the catch-all.
       h = builtins.hashString "sha256" (builtins.toJSON {
-        inherit mac allExtensions allStarExtensions hasTrunk hasIntercomButton intercomLineIndex;
+        inherit mac allExtensions allStarExtensions hasTrunk hasIntercomButton intercomLineIndex blfPersons;
       });
       versionStamp = "${builtins.substring 0 8 h}-${builtins.substring 8 4 h}-${builtins.substring 12 4 h}-${builtins.substring 16 4 h}-${builtins.substring 20 12 h}";
       extMatch = ext: "  <TEMPLATE match=\"${ext}\" timeout=\"0\" />";