# Quick Start Guide

The following Description applies to Ubuntu or similar.

## Clone repository
  Clone this repository `git clone https://gitlab.cip.ifi.lmu.de/jost/UniWorX.git` and navigate into the new directory `cd UniWorX`.

## LDAP
  install:  
  `sudo apt-get install slapd ldap-utils`


## PostgreSQL
  install:  
  `sudo apt-get install postgresql`

  switch to user *postgres* (got created during installation):  
  `sudo -i -u postgres`

  add db user *uniworx*:  
  `createuser --interactive`

  you'll get a prompt:

  ```
  Enter name of role to add:` - [enter 'uniworx']
  Shall the new role be a superuser? (y/n)` - [not exactly sure. Guess not?]
  ```

  create database *uniworx*:  
  `createdb uniworx`

  to access the database as user *uniworx* you now need to add a new linux-user called *uniworx*:  
  `sudo adduser uniworx`

  log-in as new user *uniworx*:  
  `sudo -i -u uniworx`

  you can now use `psql uniworx` to execute SQL-commands and such.

## stack
  Install with:  
  `curl -sSL https://get.haskellstack.org/ | sh`

  setup stack and install dependencies:  
  `stack setup`

  During this step or the next you might get an error that says something about missing C libraries for `ldap` and `lber`. You can install these using  
  `sudo apt-get install libsasl2-dev libldap2-dev`

  If you get an error that says *You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.*  
  Go ahead an install `libpq-dev` with  
  `sudo apt-get install libpq-dev`

  Build the app:  
  `stack build`

  This might take a few minutes if not hours... be prepared.

  install yesod:  
  `stack install yesod-bin --install-ghc`

## Add Dumy-Data and run the app
  After building the app you can prepare the database and add some dummy data:
  `./fill-db.hs`

  Run the app:  
  `./start.sh`

  `Devel application launched: http://localhost:3000`  
  means you are good to go.

  If you followed the steps above you should now be able to login as user Gregor Kleen using `LDAP:g.kleen@ifi.lmu.de` as dummy login.

***

# Sources and more infos
  PostgreSQl:   
  https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-16-04

  stack:   https://docs.haskellstack.org/en/stable/README/#how-to-install

  ldap:  https://wiki.ubuntuusers.de/OpenLDAP_ab_Precise/


***

# PostgreSQL

Starten als Root:

# systemctl start postgresql
# find / -name postgresql.conf
# cd /var/lib/pgsql/data/
# su - postgres


psql -U uniworx -d uniworx -h 127.0.0.1 -w

--Zeige Tabellen
\dt

--Zeige Tabellen Inhalt:
TABLE "user";
-- Die Anführungszeichen können manchmal weggelassen werden, aber
-- bei user sind sie notwendig, da es auch Schlüsselwort in sql ist.

--Lösche Tabelle "course" und alle davon abhängigen:
DROP TABLE "course" CASCADE;

-- UserId 5 zum Lecturer in SchoolId 1 machen (27 ist laufende Nummer)
INSERT INTO "user_lecturer" (id,"user","school") VALUES (27,5,1);

-- Beenden:
\q

-- Hilfe:
\help