immich-folder-album-creator/README.md

# Immich Folder Album Creator

This is a python script designed to automatically create albums in [Immich](https://immich.app/) from a folder structure mounted into the Immich container.
This is useful for automatically creating and populating albums for external libraries.
Using the provided docker image, the script can simply be added to the Immich compose stack and run along the rest of Immich's containers.

__Current compatibility:__ Immich v1.105.x and below

## Disclaimer
This script is mostly based on the following original script: [REDVM/immich_auto_album.py](https://gist.github.com/REDVM/d8b3830b2802db881f5b59033cf35702)

## Installation

### Bare Python Script
1. Download the script and its requirements
```bash
curl https://raw.githubusercontent.com/Salvoxia/immich-folder-album-creator/main/immich_auto_album.py -o immich_auto_album.py
curl https://raw.githubusercontent.com/Salvoxia/immich-folder-album-creator/main/requirements.txt -o requirements.txt
```
2. Install requirements
```bash
pip3 install -r requirements.txt
```
3. Run the script
```
python3 ./immich_auto_album.py -h
usage: immich_auto_album.py [-h] [-r ROOT_PATH] [-u] [-a ALBUM_LEVELS] [-s ALBUM_SEPARATOR] [-c CHUNK_SIZE] [-C FETCH_CHUNK_SIZE] [-l {CRITICAL,ERROR,WARNING,INFO,DEBUG}] root_path api_url api_key

Create Immich Albums from an external library path based on the top level folders

positional arguments:
  root_path             The external libarary's root path in Immich
  api_url               The root API URL of immich, e.g. https://immich.mydomain.com/api/
  api_key               The Immich API Key to use

options:
  -h, --help            show this help message and exit
  -r ROOT_PATH, --root-path ROOT_PATH
                        Additional external libarary root path in Immich; May be specified multiple times for multiple import paths or external libraries. (default: None)
  -u, --unattended      Do not ask for user confirmation after identifying albums. Set this flag to run script as a cronjob. (default: False)
  -a ALBUM_LEVELS, --album-levels ALBUM_LEVELS
                        Number of sub-folders below the root path used for album name creation. Positive numbers start from top of the folder structure, negative numbers from the bottom. Cannot be 0. (default: 1)
  -s ALBUM_SEPARATOR, --album-separator ALBUM_SEPARATOR
                        Separator string to use for compound album names created from nested folders. Only effective if -a is set to a value > 1 (default: )
  -c CHUNK_SIZE, --chunk-size CHUNK_SIZE
                        Maximum number of assets to add to an album with a single API call (default: 2000)
  -C FETCH_CHUNK_SIZE, --fetch-chunk-size FETCH_CHUNK_SIZE
                        Maximum number of assets to fetch with a single API call (default: 5000)
  -l {CRITICAL,ERROR,WARNING,INFO,DEBUG}, --log-level {CRITICAL,ERROR,WARNING,INFO,DEBUG}
                        Log level to use (default: INFO)
```

### Docker

A Docker image is provided to be used as a runtime environment. It can be used to either run the script manually, or via cronjob by providing a crontab expression to the container. The container can then be added to the Immich compose stack directly.

#### Environment Variables
The environment variables are analoguous to the script's command line arguments.

| Environment varible   |  Mandatory? | Description   |
| :------------------- | :----------- | :------------ |
| ROOT_PATH            | yes | A single or a comma separated list of import paths for external libraries in Immich                       |
| API_URL            | yes | The root API URL of immich, e.g. https://immich.mydomain.com/api/                                    |
| API_KEY            | yes | The Immich API Key to use                                                                            |
| ALBUM_LEVELS       | no | Number of sub-folders below the root path used for album name creation. Positive numbers start from top of the folder structure, negative numbers from the bottom. Cannot be 0. Refer to [How it works](#how-it-works) for a detailed explanation|
| ALBUM_SEPARATOR    | no | Separator string to use for compound album names created from nested folders. Only effective if -a is set to a value > 1 (default: " ") |
| CHUNK_SIZE         | no | Maximum number of assets to add to an album with a single API call (default: 2000)  |
| FETCH_CHUNK_SIZE   | no | Maximum number of assets to fetch with a single API call (default: 5000)            |
| LOG_LEVEL          | no | Log level to use (default: INFO), allowed values: CRITICAL,ERROR,WARNING,INFO,DEBUG |

#### Run the container with Docker

To perform a manually triggered run, use the following command:

```bash
docker run -e API_URL="https://immich.mydomain.com/api/" -e API_KEY="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" -e ROOT_PATH="/external_libs/photos" salvoxia/immich-folder-album-creator:latest /script/immich_auto_album.sh
```

To set up the container to periodically run the script, give it a name, pass the TZ variable and a valid crontab expression as environment variable. This example runs the script every hour:
```bash
docker run --name immich-folder-album-creator -e TZ="Europe/Berlin" -e CRON_EXPRESSION="0 * * * *" -e API_URL="https://immich.mydomain.com/api/" -e API_KEY="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" -e ROOT_PATH="/external_libs/photos" salvoxia/immich-folder-album-creator:latest
```

If your external library uses multiple import paths or you have set up multiple external libraries, you can pass multiple paths in `ROOT_PATH` by setting it to a comma separated list of paths:  
```bash
docker run --name immich-folder-album-creator -e TZ="Europe/Berlin" -e CRON_EXPRESSION="0 * * * *" -e API_URL="https://immich.mydomain.com/api/" -e API_KEY="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" -e ROOT_PATH="/external_libs/photos,/external_libs/more_photos" salvoxia/immich-folder-album-creator:latest
```

### Run the container with Docker-Compose

Adding the container to Immich's `docker-compose.yml` file:
```yml
version: "3.8"

#
# WARNING: Make sure to use the docker-compose.yml of the current release:
#
# https://github.com/immich-app/immich/releases/latest/download/docker-compose.yml
#
# The compose file on main may not be compatible with the latest release.
#

name: immich

services:
  immich-server:
    container_name: immich_server
    volumes:
     - /path/to/my/photos:/external_libs/photos
  ...
  immich-folder-album-creator:
    container_name: immich_folder_album_creator
    image: salvoxia/immich-folder-album-creator:latest
    restart: unless-stopped
    environment:
      API_URL: http://immich_server:3001/api
      API_KEY: xxxxxxxxxxxxxxxxx
      ROOT_PATH: /external_libs/photos
      CRON_EXPRESSION: "0 * * * *"
      TZ: Europe/Berlin

```

## How it works

The script utilizies [Immich's REST API](https://immich.app/docs/api/) to query all images indexed by Immich, extract the folder for all images that are in the top level of any provided `root_path`, then creates albums with the names of these folders (if not yet exists) and adds the images to the correct albums.

The following arguments influence what albums are created:  
`root_path`, `--album-levels` and `--album-separator`  

  - `root_path` is the base path where images are looked for. Multiple root paths can be specified by adding the `-r` argument as many times as necessary. Only images within that base path will be considered for album creation.
  - `--album-levels` controls how many levels of nested folders are considered when creating albums. The default is `1`. For examples see below.
  - `--album-separator` sets the separator used for concatenating nested folder names to create an album name. It is a blank by default.

__Examples:__  
Suppose you provide an external library to Immich under the path `/external_libs/photos`.
The folder structure of `photos` might look like this:

```
/external_libs/photos/2020
/external_libs/photos/2020/02 Feb
/external_libs/photos/2020/02 Feb/Vacation
/external_libs/photos/2020/08 Aug/Vacation
/external_libs/photos/Birthdays/John
/external_libs/photos/Birthdays/Jane
/external_libs/photos/Skiing 2023
```

Albums created for `root_path = /external_libs/photos` (`--album-levels` is implicitly set to `1`):
 - `2020` (containing all images from `2020` and all sub-folders)
 - `Birthdays` (containing all images from Birthdays itself as well as `John` and `Jane`)
 - `Skiing 2023`

Albums created for `root_path = /external_libs/photos/Birthdays`:
 - `John`
 - `Jane`

 Albums created for `root_path = /external_libs/photos` and `--album-levels = 2`:
 - `2020` (containing all images from `2020` itself, if any)
 - `2020 02 Feb` (containing all images from `2020/02 Feb` itself, `2020/02 Feb/Vacation` and `2020/02 Aug/Vacation`)
 - `Birthdays John` (containing all imags from `Birthdays/John`)
 - `Birthdays Jane` (containing all imags from `Birthdays/John`)
 - `Skiing 2023`

 Albums created for `root_path = /external_libs/photos`, `--album-levels = 3` and `--album-separator " - "` :
 - `2020` (containing all images from `2020` itself, if any)
 - `2020 - 02 Feb` (containing all images from `02 Feb` itself, if any)
 - `2020 - 02 Feb - Vacation` (containing all imags from `2020/02 Feb/Vacation`)
 - `2020 - 08 Aug - Vacation` (containing all imags from `2020/02 Aug/Vacation`)
 - `Birthdays - John`
 - `Birthdays - Jane`
 - `Skiing 2023`

  Albums created for `root_path = /external_libs/photos`, `--album-levels = -1` and `--album-separator " - "` :
 - `2020` (containing all images from `2020` itself, if any)
 - `02 Feb` (containing all images from `2020/02 Feb` itself, if any)
 - `Vacation` (containing all images from `2020/02 Feb/Vacation` AND `2020/08 Aug/Vacation`)
 - `John` (containing all imags from `Birthdays/John`)
 - `Jane` (containing all imags from `Birthdays/Jane`)
 - `Skiing 2023`
 
 Note that with negative `album-levels` images from different parent folders will be mixed in the same album if they reside in folders with the same name (see `Vacation` in example above).

Since Immich does not support real nested albums ([yet?](https://github.com/immich-app/immich/discussions/2073)), neither does this script.