feature #102 Adding support for scheduled tasks (Nyholm)

This PR was squashed before being merged into the master branch.

Discussion
----------

Adding support for scheduled tasks

This is awfully similar to Messenger component.

I decided on this approach because I might want to schedule a task for 2-3 weeks. That is too much for Messenger's `DelayStamp` with AMQP.

Commits
-------

dd6aca7 Adding envar
6a20992 Added config and migrations
3b5ab60 Make sure symfony cloud have a database
29caf57 Adding support for scheduled tasks

Author: weaverryan

.env

@@ -25,3 +25,11 @@ BOT_USERNAME='carsonbot-test'
 ###> knplabs/github-api ###
 #GITHUB_TOKEN=XXX
 ###< knplabs/github-api ###
+
+###> doctrine/doctrine-bundle ###
+# Format described at https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/configuration.html#connecting-using-a-url
+# For an SQLite database, use: "sqlite:///%kernel.project_dir%/var/data.db"
+# For a PostgreSQL database, use: "postgresql://db_user:[email protected]:5432/db_name?serverVersion=11&charset=utf8"
+# IMPORTANT: You MUST configure your server version, either here or in config/packages/doctrine.yaml
+DATABASE_URL=sqlite:///%kernel.project_dir%/var/data.db
+###< doctrine/doctrine-bundle ###

.symfony.cloud.yaml

@@ -6,6 +6,7 @@ runtime:
     extensions:
         - apcu
         - mbstring
+        - pdo_pgsql
 
 build:
     flavor: none
@@ -31,3 +32,11 @@ hooks:
     deploy: |
         set -x -e
         (>&2 symfony-deploy)
+
+crons:
+    run_Tasks:
+        spec: */5 * * * *
+        cmd: croncape bin/console app:task:run
+
+relationships:
+    database: "mydatabase:postgresql"

.symfony/services.yaml

@@ -0,0 +1,5 @@
+mydatabase:
+    # supported versions: 9.6, 10, 11, 12
+    # 9.3 is also available but not maintained upstream
+    type: postgresql:12
+    disk: 1024

composer.json

@@ -4,6 +4,10 @@
     "license": "MIT",
     "require": {
         "php": ">=7.2",
+        "composer/package-versions-deprecated": "^1.11",
+        "doctrine/doctrine-bundle": "^2.1",
+        "doctrine/doctrine-migrations-bundle": "^3.0",
+        "doctrine/orm": "^2.7",
         "incenteev/composer-parameter-handler": "~2.0",
         "knplabs/github-api": "^2.1",
         "nyholm/psr7": "^1.3",