#+TITLE: Conex Builder Documentation
#+PROPERTY: header-args:sql :engine postgres :dbhost "localhost" :dbport 5432 :dbuser "conex" :dbpassword "1234" :database "iterone"

* Database

** Create DB

#+begin_src sh
sudo su - postgres
psql
#+end_src

Then:

#+BEGIN_SRC sql
CREATE DATABASE iterone OWNER conex;
#+END_SRC

** Sites table

#+BEGIN_SRC sql :results silent
DROP TABLE IF EXISTS changes;
DROP TABLE IF EXISTS payments;
DROP TABLE IF EXISTS sites;

CREATE TABLE sites (
    id     SERIAL PRIMARY KEY,
    folder VARCHAR(35) UNIQUE NOT NULL,
    status VARCHAR(4),
    due    TIMESTAMPTZ NOT NULL,
    name   VARCHAR(50),
    sur    VARCHAR(50),
    email  VARCHAR(100) NOT NULL,
    phone  VARCHAR(20),
    code   VARCHAR(2),
    title  VARCHAR(35) NOT NULL,
    slogan VARCHAR(100) NOT NULL,
    banner TEXT,
    raw    JSONB NOT NULL,
    auth   INTEGER,
    valid  TIMESTAMPTZ
);
#+END_SRC

#+BEGIN_SRC sql
SELECT * FROM sites;
#+END_SRC

#+RESULTS:
| id | folder | status | due | name | sur | email | phone | code | title | slogan | banner | raw | auth | valid |
|----+--------+--------+-----+------+-----+-------+-------+------+-------+--------+--------+-----+------+-------|

** Payments table

#+BEGIN_SRC sql :results silent
DROP TABLE IF EXISTS changes;
DROP TABLE IF EXISTS payments;

CREATE TABLE payments (
    id       SERIAL PRIMARY KEY,
    capture  VARCHAR(100) NOT NULL,
    site     INTEGER REFERENCES sites(id) NOT NULL,
    amount   DECIMAL(10, 2) NOT NULL,
    currency VARCHAR(3) NOT NULL,
    status   VARCHAR(18) NOT NULL, -- PayPal capture status length -- https://developer.paypal.com/docs/api/orders/v2/#orders_capture
    date     TIMESTAMPTZ NOT NULL
);
#+END_SRC

#+BEGIN_SRC sql
SELECT * FROM payments;
#+END_SRC

#+RESULTS:
| id | capture | site | amount | currency | status | date |
|----+---------+------+--------+----------+--------+------|

* Error codes

** http.Error

** Fatalf

Fatal error will cause program shutdown by calling ~os.Exit(1)~.

*** Error 000: Missing credentials

*Package*: ~main~
*Function*: ~init()~
*Libraries*: ~os~, ~log~, ~github.com/joho/godotenv~

Authentication and other parameters are located in the ~.env~ file which mist be
located at the root of main binary execution.

Possible causes for error are: 

- Binary execution directory doesn't have the ~.env~ file
- Missing parameters for initializing environment values
- Corruption of ~.env~ file
- Library error
  
Steps to troubleshoot:

1. Check ~.env~ exists
2. Check ~.env~ authentication values
3. Check ~.env~ file integrity
4. Update, rollback or troubleshoot library

*** Error 001: Can't connect to database

*Package*: ~main~
*Function*: ~init()~
*Libraries*: ~os~, ~log~

The ~db~ object manages database queries. This object is used to ping the
database, a correct ping depends on correctly set credentials, and properly
initialized ~db~ object.

Possible causes for error are: 

- Wrong database credentials
- Missing database credentials

Steps to troubleshoot:

1. Check set, correct and valid credentials in ~.env~ file

*** Error: 002: Can't start server

*Package*: ~main~
*Function*: ~main()~
*Libraries*: ~os~, ~log~, ~net/http~, ~os/signal~

The server runs in a Goroutine, started on a port defined in ~.env~.

Possible causes for error are: 

- Port is in use
- Port usage denied

Steps to troubleshoot:

1. Check set, correct and valid port in ~.env~ file