ogn-python/README.md

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# ogn-python
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A database backend for the [Open Glider Network](http://wiki.glidernet.org/).
The ogn-python module saves all received beacons into a database with [SQLAlchemy](http://www.sqlalchemy.org/).
It connects to the OGN aprs servers with [python-ogn-client](https://github.com/glidernet/python-ogn-client).
It requires [PostgreSQL](http://www.postgresql.org/) and [PostGIS](http://www.postgis.net/).
[Examples](https://github.com/glidernet/ogn-python/wiki/Examples)
## Installation and Setup
1. Checkout the repository
```
git clone https://github.com/glidernet/ogn-python.git
```
2. Install python requirements
```
pip install -r requirements.txt
```
3. Install [PostgreSQL](http://www.postgresql.org/) with [PostGIS](http://www.postgis.net/) Extension.
Create a database (use "ogn" as default, otherwise you have to modify the configuration, see below)
4. Optional: Install redis for asynchronous tasks (like takeoff/landing-detection)
```
apt-get install redis-server
```
5. Create database
```
./manage.py db.init
```
There is also a [Vagrant](https://www.vagrantup.com/) environment for the development of ogn-python.
You can create and start this virtual machine with `vagrant up` and login with `vagrant ssh`.
The code of ogn-python will be available in the shared folder `/vagrant`.
## Usage
### Running the aprs client and task server
To schedule tasks like takeoff/landing-detection (`logbook.compute`),
[Celery](http://www.celeryproject.org/) with [Redis](http://www.redis.io/) is used.
The following scripts run in the foreground and should be deamonized
(eg. use [supervisord](http://supervisord.org/)).
- Start the aprs client
```
./manage.py gateway.run
```
- Start a task server (make sure redis is up and running)
```
celery -A ogn.collect worker -l info
```
- Start the task scheduler (make sure a task server is up and running)
```
celery -A ogn.collect beat -l info
```
To load a custom configuration, create a file `myconfig.py` (see [config/default.py](config/default.py))
and set the environment variable `OGN_CONFIG_MODULE` accordingly.
```
touch myconfig.py
export OGN_CONFIG_MODULE="myconfig"
./manage.py gateway.run
```
### manage.py - CLI options
```
usage: manage [<namespace>.]<command> [<args>]
positional arguments:
command the command to run
optional arguments:
-h, --help show this help message and exit
available commands:
[bulkimport]
convert_logfile Convert ogn logfiles to csv logfiles (one for aircraft beacons and one for receiver beacons) <arg: path>. Logfile name: blablabla.txt_YYYY-MM-DD.
create_indices Create indices for AircraftBeacon.
drop_indices Drop indices of AircraftBeacon.
import_csv_logfile Import csv logfile <arg: csv logfile>.
[db]
drop Drop all tables.
import_airports Import airports from a ".cup" file
import_ddb Import registered devices from the DDB.
import_ddb_file Import registered devices from a local file.
init Initialize the database.
upgrade Upgrade database to the latest version.
[gateway]
run Run the aprs client.
[igcexport]
write Export igc file for <address> at <date>.
[logbook]
compute_logbook Compute logbook.
compute_takeoff_landingCompute takeoffs and landings.
show Show a logbook for <airport_name>.
[stats]
airports Compute airport statistics.
devices Compute device statistics
receivers Compute receiver statistics.
[show.airport]
list_all Show a list of all airports.
[show.deviceinfos]
stats Show some stats on registered devices.
[show.devices]
aircraft_type_stats Show stats about aircraft types used by devices.
hardware_stats Show stats about hardware version used by devices.
software_stats Show stats about software version used by devices.
stealth_stats Show stats about stealth flag set by devices.
[show.receiver]
hardware_stats Show some statistics of receiver hardware.
list_all Show a list of all receivers.
software_stats Show some statistics of receiver software.
```
Only the command `logbook.compute` requires a running task server (celery) at the moment.
### Available tasks
- `ogn.collect.database.import_ddb` - Import registered devices from the DDB.
- `ogn.collect.database.import_file` - Import registered devices from a local file.
- `ogn.collect.database.update_country_code` - Update country code in receivers table if None.
- `ogn.collect.database.update_devices` - Add/update entries in devices table and update foreign keys in aircraft beacons.
- `ogn.collect.database.update_receivers` - Add/update_receivers entries in receiver table and update receivers foreign keys and distance in aircraft beacons and update foreign keys in receiver beacons.
- `ogn.collect.logbook.update_logbook` - Add/update logbook entries.
- `ogn.collect.logbook.update_max_altitude` - Add max altitudes in logbook when flight is complete (takeoff and landing).
- `ogn.collect.stats.update_device_stats` - Add/update entries in device stats table.
- `ogn.collect.stats.update_receiver_stats` - Add/update entries in receiver stats table.
- `ogn.collect.takeoff_landing.update_takeoff_landing` - Compute takeoffs and landings.
If the task server is up and running, tasks could be started manually.
```
python3
>>>from ogn.collect.database import import_ddb
>>>import_ddb.delay()
```
## License
Licensed under the [AGPLv3](LICENSE).