From cb57a3ecd501823f03d05e627f71964cc16303f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A9rard=20Collin?= <gerard.collin@appliweb.net>
Date: Fri, 21 Jun 2024 18:44:58 +0200
Subject: [PATCH] Support for Bookworm & avoid reinstall

---
 helpers/helpers.v1.d/mongodb | 41 +++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/helpers/helpers.v1.d/mongodb b/helpers/helpers.v1.d/mongodb
index d40d11bfe..d226443a4 100644
--- a/helpers/helpers.v1.d/mongodb
+++ b/helpers/helpers.v1.d/mongodb
@@ -293,6 +293,7 @@ ynh_mongo_remove_db() {
 }
 
 # Install MongoDB and integrate MongoDB service in YunoHost
+# It can upgrade / downgrade the desired mongo version to ensure a compatible one is installed
 #
 # usage: ynh_install_mongo [--mongo_version=mongo_version]
 # | arg: -m, --mongo_version=		- Version of MongoDB to install
@@ -311,15 +312,39 @@ ynh_install_mongo() {
 	local mongo_debian_release=$(ynh_get_debian_release)
 
 	if [[ $(cat /proc/cpuinfo) != *"avx"* && "$mongo_version" != "4.4" ]]; then
-    ynh_print_warn --message="Installing Mongo 4.4 as $mongo_version is not compatible with your cpu (see https://docs.mongodb.com/manual/administration/production-notes/#x86_64)."
-    mongo_version="4.4"
-  fi
-  if [[ "$mongo_version" == "4.4" ]]; then
-    ynh_print_warn --message="Switched to buster install as Mongo 4.4 is not compatible with $mongo_debian_release."
-    mongo_debian_release=buster
-  fi
+    	ynh_print_warn --message="Installing Mongo 4.4 as $mongo_version is not compatible with your cpu (see https://docs.mongodb.com/manual/administration/production-notes/#x86_64)."
+    	mongo_version="4.4"
+	fi
+	if [[ "$mongo_version" == "4.4" ]]; then
+		ynh_print_warn --message="Switched to buster install as Mongo 4.4 is not compatible with $mongo_debian_release."
+		mongo_debian_release=buster
+	fi
 
-	ynh_install_extra_app_dependencies --repo="deb http://repo.mongodb.org/apt/debian $mongo_debian_release/mongodb-org/$mongo_version main" --package="mongodb-org mongodb-org-server mongodb-org-tools mongodb-mongosh" --key="https://www.mongodb.org/static/pgp/server-$mongo_version.asc"
+	if [[ "$mongo_debian_release" == "bookworm" && "$mongo_version" != "7."* ]]; then
+		ynh_print_warn --message="Switched to Mongo v7 as $mongo_version is not compatible with $mongo_debian_release"
+		mongo_version = "7.0"
+	fi
+
+	# Check if MongoDB is already installed
+	local install_package=true
+	local current_version=$(ynh_package_version --package="mongodb-org-server")
+	current_version=$(cut -c 1-3 <<< "$current_version")
+	
+	if [[ "a$current_version" != "a" ]]; then
+		if (( $(bc <<< "$current_version < $mongo_version") )); then
+			ynh_print_info --message="Upgrading Mongo from version $current_version to $mongo_version"
+		else
+			if (( $(bc <<< "$current_version >= $mongo_version") )); then
+				ynh_print_info --message="Mongo version $current_version is already installed and will be kept instead of requested version $mongo_version"
+				install_package=false
+			fi
+		fi
+	fi
+
+	if [[ "$install_package" = true ]]; then
+		ynh_install_extra_app_dependencies --repo="deb http://repo.mongodb.org/apt/debian $mongo_debian_release/mongodb-org/$mongo_version main" --package="mongodb-org mongodb-org-server mongodb-org-tools mongodb-mongosh" --key="https://www.mongodb.org/static/pgp/server-$mongo_version.asc"
+	fi
+	
 	mongodb_servicename=mongod
 
 	# Make sure MongoDB is started and enabled