From 0432e9d86f86953e7249906a352cadb88ebb3446 Mon Sep 17 00:00:00 2001
From: Vera Lewis <vera.lewis@xenami.net>
Date: Sun, 31 Mar 2024 01:32:50 -0500
Subject: [PATCH] Added re-encryption capability to init function and changed
 create to use stored gpg recipients

---
 vns | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 78 insertions(+), 17 deletions(-)

diff --git a/vns b/vns
index c2111d4..cfb0299 100644
--- a/vns
+++ b/vns
@@ -65,15 +65,68 @@ vns_sanityCheck () {
 
 vns_init () {
 
-    # initStore
+    # init (GPG recipients...)
     # Prepares $VNS_STORE for use
 
-    if [ -d "$VNS_STORE/.vns_git" ]; then
-        vns_raise "Store already initialized" 2; 
-    fi
-    
-    git init "$VNS_STORE"
+    if [ "$#" -lt 1 ]; then
+        vns_raise "No GPG Recipients Specified" 3
 
+    elif [ -d "$VNS_STORE/.git" ]; then
+    
+        # Reset list of GPG recipients
+        echo -n '' > "${VNS_STORE}/.gpg-id"
+
+        vns_reencrypt "$VNS_STORE" "$@"
+
+    else
+        # Create a new VNS Store
+        git init "$VNS_STORE"
+        
+        # Make initial commit
+        vns_git add .gpg-id
+        vns_git commit -am "Initialized VNS Store"
+
+    fi
+ 
+    # Store GPG Recipients for later note creation
+    # whether re-encrypting, or initializing a new store
+    for recipient in "$@"; do
+        echo "$recipient" >> "${VNS_STORE}/.gpg-id"
+    done
+}
+
+vns_reencrypt () {
+    # reencrypt (GPG recipients...)
+
+    # Remove script name from arguments list
+    shift 
+
+    # Construct list of arguments from provided recipients
+    local -a GPG_RECIPS;
+    for recipient in "$@"; do
+       GPG_RECIPS=( "${GPG_RECIPS[@]}" "-r" "$recipient" )
+    done
+
+    # Find all notes and re-encrypt them 
+    find "${VNS_STORE}" -name "*.gpg" | while read -r FILE; do\
+        gpg --batch -d "$FILE" 2>/dev/null | gpg --batch "${GPG_RECIPS[@]}" -e -o "${FILE}_new".gpg >/dev/null 2>&1
+        mv "${FILE}_new.gpg" "$FILE"; 
+    done
+
+    vns_report "Re-encrypted existing notes with $*"
+    vns_git commit -am "Re-encrypted existing notes with ${GPG_RECIPS[*]}" >/dev/null 2>&1 
+}
+
+vns_gpgid () {
+
+    # gpgid
+    # Echo all recipients listed in .gpg-id
+
+    # shellcheck disable=SC2002
+    cat "${VNS_STORE}/.gpg-id" | while read -r recipient; do
+       echo "-r"
+       echo "$recipient"
+    done
 }
 
 vns_printHelp (){
@@ -82,9 +135,9 @@ vns_printHelp (){
     # Prints help information to stdout
 
     printf "%s"   "usage: vns [-cedlp] <notebook/section/name>"
-    printf "\\n%s" "       vns -I"
+    printf "\\n%s" "       vns -I GPG_RECIPIENT (GPG_RECIPIENTS...)"
     printf "\\n%s" "       vns -h"
-    printf "\\n%s" "       vns vns_git ..."
+    printf "\\n%s" "       vns git ..."
     printf "\\n"
     printf "\\n%s" "  -c : Create note"
     printf "\\n%s" "  -d : Delete note(s)"
@@ -151,6 +204,18 @@ vns_rm () {
 
 }
 
+vns_header () {
+    # header (title)
+    # Print note title and date in Markdown format
+
+    if [ "$#" -lt 1 ]; then
+        vns_raise "header: no note title provided" 4
+    else
+        echo "# $1"
+        printf "## %s" "$(date)"
+    fi
+}
+
 vns_create () {
 
     # create (note)
@@ -169,17 +234,13 @@ vns_create () {
 
     # If the note belongs to a new notebook, create the notebook
     if [ ! -d "$(dirname "$1")" ]; then mkdir -p "$VNS_STORE/$(dirname "$1")"; fi
+    
+    # Create empty note
+    vns_header "$(basename "$1")" | gpg --batch "$(vns_gpgid)" --encrypt -o "$VNS_STORE/$1.gpg"
 
-    # Create-Edit the note
+    # Edit the note
     vim "$VNS_STORE/$1.gpg"
 
-    # Warn the user if the note failed to encrypt
-    if ! file "$VNS_STORE/$1.gpg" | grep "PGP" -qs; then
-        printf "$VNS_RED_COLOR!$VNS_RESET_COLOR - %s\\n    %s\\n"\
-        "The created note was not encrypted."\
-        "Check your vim-gnupg setup."
-    fi
-
     # Update vns_git
     vns_git add "$VNS_STORE/$1.gpg" > /dev/null
     vns_git commit -m "Added $1" > /dev/null
@@ -354,7 +415,7 @@ vns_git () {
 vns () {
 
     # Bypass sanity check if told to initialize store
-    if [ "$*" != "-I" ]; then 
+    if [ "$1" != "-I" ]; then 
         vns_sanityCheck;
     fi