Polish IT Conferences

app.php

<?php

    require 'vendor/autoload.php';

    define('DATA_URL', 'https://raw.githubusercontent.com/cezarypiatek/polish-it-conferences/master/%s.md');
    $years = [date('Y'), strftime('%Y', strtotime('next year'))];

    $data = implode("\n", array_map(function ($year) {
        return @file_get_contents(sprintf(DATA_URL, $year));
    }, $years));

    preg_match_all('/
        ^\|
        \s* (?P<name>[^|]+?) \s*\|
        \s* (?P<city>[^|]+?) \s*\|
        \s* (?P<date_start>\d\d\d\d-\d\d-\d\d) (?:[ ]-[ ](?P<date_end>\d\d\d\d-\d\d-\d\d))? \s*\|
        \s* \[[^]]+\]\((?P<link>https?:\/\/[^)]+)\) \s*\|
        \s* [^|]* \s*\|
        \s* (?P<category>[^|]+?) \s*\|

    /xm', $data, $conferences, PREG_SET_ORDER);

    $vCalendar = array_reduce($conferences, function ($calendar, $c) {
        $event = new \Eluceo\iCal\Component\Event();
        $event
            ->setDtStart(new \DateTime($c['date_start']))
            ->setDtEnd(new \DateTime($c['date_end'] ?: $c['date_start']))
            ->setNoTime(true)
            ->setSummary($c['name'])
            ->setLocation($c['city'])
            ->setCategories(array_map('trim', explode(',', $c['category'])))
            ->setDescription($c['link'])
            ->setDescriptionHTML(sprintf('<a href="%1$s">%1$s</a>', $c['link']));

        $calendar->addComponent($event);

        return $calendar;
    }, new \Eluceo\iCal\Component\Calendar('conferences.narzekasz.pl'));

    echo $vCalendar->render();

Makefile

EXECUTABLES = php aws curl awk
K := $(foreach exec,$(EXECUTABLES),\
        $(if $(shell which $(exec)),,$(error "No $(exec) in PATH")))

all: vendor app.php
	php app.php > conferences.ical
	aws s3 cp --acl public-read --content-type "text/calendar" conferences.ical s3://polish-it-conferences/conferences.ical --profile polish-it-conferences

vendor: composer composer.json composer.lock
	./composer install

composer.json:
	./composer req eluceo/ical

composer:
	curl -s https://composer.github.io/installer.sig > composer-setup.sig
	curl -s https://getcomposer.org/installer > composer-setup.php
	awk '{print $$0 "  composer-setup.php"}' composer-setup.sig | sha384sum --check
	php composer-setup.php --quiet
	rm composer-setup.*
	mv composer.phar composer

app.php:
	curl -s 'https://gist.githubusercontent.com/mlebkowski/f89cf00a7716c183bb7bb622ee4e333b/raw/app.php' > app.php

clean:
	rm -fr composer.json composer.lock composer vendor/ app.php conferences.ical