3 files changed, 160 insertions, 16 deletions

diff --git a/user-profiles/feeds/default.nix b/user-profiles/feeds/default.nix
index cfecf17e..82be90c7 100644
--- a/user-profiles/feeds/default.nix
+++ b/user-profiles/feeds/default.nix
@@ -1,18 +1,11 @@
-{ config, flakeInputs, userName, pkgs, lib, ... }:
-
-with lib;
-
-let
-  cfg = config.home-manager.users.${userName};
-  inherit (flakeInputs.home-manager.lib) hm;
-  
-  imm = flakeInputs.imm.defaultPackage.${config.nixpkgs.system};
-in {
-  config.home-manager.users.${userName} = {
-    home.packages = [ imm ];
-
-    home.activation.createImm = hm.dag.entryAfter ["writeBoundary"] ''
-      $DRY_RUN_CMD mkdir -p $VERBOSE_ARG ${cfg.xdg.configHome}/imm
-    '';
+{ config, flakeInputs, pkgs, lib, userName, customUtils, ... }:
+{
+  home-manager.users.${userName} = {...}: {
+    imports = [
+      (customUtils.overrideModuleArgs
+        (import ./module.nix)
+        (inputs: inputs // { inherit flakeInputs; inherit (config.nixpkgs) system; })
+      )
+    ];
   };
 }
diff --git a/user-profiles/feeds/imm-notmuch-insert.py b/user-profiles/feeds/imm-notmuch-insert.py
new file mode 100644
index 00000000..855f3a83
--- /dev/null
+++ b/user-profiles/feeds/imm-notmuch-insert.py
@@ -0,0 +1,37 @@
+#!@python@/bin/python
+
+import json
+import sys
+import subprocess
+from io import StringIO
+from email.message import EmailMessage
+import configparser
+from os import environ
+from dateutil.parser import isoparse
+
+def main():
+    notmuchConfig = configparser.ConfigParser()
+    notmuchConfig.read(environ.get('NOTMUCH_CONFIG'))
+
+    callbackMessage = json.load(sys.stdin)
+
+    msg = EmailMessage()
+    authors = ', '.join(map(lambda author: author['name'], callbackMessage['feed_item']['authors']))
+    msg['From'] = f"{callbackMessage['feed_definition']['title']} ({authors}) <imm@imm.invalid>"
+    msg['To'] = f"{notmuchConfig['user']['name']} <{notmuchConfig['user']['primary_email']}>"
+    msg['Subject'] = callbackMessage['feed_item']['title']
+    msg['Message-ID'] = f"{callbackMessage['feed_item']['identifier']@imm.invalid}"
+    for link in callbackMessage['feed_item']['links']:
+        msg.add_header('Link', link)
+    if 'date' in callbackMessage['feed_item']:
+        date = isoparse(callbackMessage['feed_item']['date'])
+        msg['Date'] = date.strftime('%a, %e %b %Y %T %z')
+
+    subprocess.run(
+        args=['notmuch', 'insert'],
+        check=True,
+        stdin=StringIO(bytes(msg))
+    )
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/user-profiles/feeds/module.nix b/user-profiles/feeds/module.nix
new file mode 100644
index 00000000..7a29331b
--- /dev/null
+++ b/user-profiles/feeds/module.nix
@@ -0,0 +1,114 @@
+{ config, flakeInputs, pkgs, lib, system, ... }:
+
+with lib;
+
+let
+  inherit (flakeInputs.home-manager.lib) hm;
+
+  configPath = "${config.xdg.configHome}/feeds/notmuchrc";
+  databasePath = "${config.xdg.dataHome}/feeds";
+  
+  imm = flakeInputs.imm.defaultPackage.${system};
+  immWrapped = pkgs.runCommand "${imm.name}-wrapped-${config.home.username}"
+    { nativeBuildInputs = with pkgs; [ makeWrapper imm ];
+    } ''
+      mkdir -p $out/bin
+      makeWrapper ${imm}/bin/imm $out/bin/imm \
+        --add-flags --callbacks=${notmuchCallbacks}
+    '';
+
+  notmuchCallbacks = pkgs.writeText "imm-callbacks-${config.home.username}.dhall" ''
+    let Callback : Type =
+      { _executable : Text
+      , _arguments : List Text
+      }
+
+    let notmuchInsert =
+      { _executable = "${immNotmuchInsert}/bin/imm-notmuch-insert"
+      , _arguments = []
+      }
+
+    let config : List Callback = [ notmuchInsert ]
+    in config    
+  '';
+
+  immNotmuchInsert = pkgs.stdenv.mkDerivation rec {
+    name = "imm-notmuch-insert-${config.home.username}";
+    src = ./imm-notmuch-insert.py;
+
+    phases = [ "buildPhase" "checkPhase" "installPhase" "fixupPhase" ];
+
+    python = pkgs.python39.withPackages (ps: with ps; [ configparser ]);
+
+    nativeBuildInputs = with pkgs; [ makeWrapper ];
+
+    buildPhase = ''
+      substituteAll $src imm-notmuch-insert
+    '';
+
+    doCheck = true;
+    checkPhase = ''
+      ${python}/bin/python -m py_compile imm-notmuch-insert
+    '';
+
+    installPhase = ''
+      install -m 0755 -D -t $out/bin \
+        imm-notmuch-insert
+    '';
+
+    fixupPhase = ''
+      wrapProgram $out/bin/imm-notmuch-insert \
+        --prefix PATH : ${pkgs.notmuch}/bin \
+        --set NOTMUCH_CONFIG ${configPath}
+    '';
+  };
+
+  mkIniKeyValue = key: value:
+    let
+      tweakVal = v:
+        if isString v then
+          v
+        else if isList v then
+          concatMapStringsSep ";" tweakVal v
+        else if isBool v then
+          (if v then "true" else "false")
+        else
+          toString v;
+    in "${key}=${tweakVal value}";
+
+  notmuchIni = {
+    database = { path = databasePath; };
+
+    maildir = { synchronize_flags = false; };
+
+    new = {
+      ignore = [];
+      tags = ["new"];
+    };
+
+    user = {
+      name = config.home.username;
+      primary_email = "${config.home.username}@imm.invalid";
+    };
+
+    search = { exclude_tags = ["deleted"]; };
+  };
+in {
+  config = {
+    home.packages = [ immWrapped ];
+
+    home.activation.createImm = hm.dag.entryAfter ["writeBoundary"] ''
+      $DRY_RUN_CMD mkdir -p $VERBOSE_ARG ${config.xdg.configHome}/imm
+    '';
+
+    xdg.configFile."feeds/notmuchrc".text =
+      let toIni = generators.toINI { mkKeyValue = mkIniKeyValue; };
+      in ''
+        # Generated by Home Manager.
+      '' + toIni notmuchIni;
+    
+    home.activation.createFeedsDatabase = hm.dag.entryAfter ["writeBoundary"] ''
+      $DRY_RUN_CMD mkdir -p $VERBOSE_ARG ${databasePath}
+    '';
+  };
+}