ハミダシクリエイティブの新着ニュースをWebhookを通じてDiscordに通知する。

hamikuri_news_notify.php

<?php
function sendDiscordWebhook($message)
{
    $url = "<DISCORD WEBHOOK URL>";
    
    $data = [
        "content" => $message
    ];
    $header = array(
        "Content-Type: application/json",
        "Content-Length: ".strlen(json_encode($data)),
        "User-Agent: DiscordBot (http://example.com, v0.0.1)"
    );
    $context = array(
        "http" => array(
            "method"  => "POST",
            "header"  => implode("\r\n", $header),
            "content" => json_encode($data)
        )
    );
    $context = stream_context_create($context);
    file_get_contents($url, false, $context);
}
$rss_url = "http://madosoft.net/hamidashi/wp-json/wp/v2/posts?categories=3";
$str = file_get_contents($rss_url);
$json = json_decode($str, true);

if (file_exists(__DIR__ . "/hamikuri_readed.json")) {
    $readed = json_decode(file_get_contents(__DIR__ . "/hamikuri_readed.json"), true);
} else {
    $readed = [];
}

foreach ($json as $article) {
    $id = $article["id"];
    $article_link = $article["link"];
    $title = $article["title"]["rendered"];
    $content = $article["content"]["rendered"];

    if (in_array($id, $readed)) {
        continue;
    }

    preg_match_all("/<a href=\"(.+?)\".*>(.+?)<\/a>/", $content, $m, PREG_SET_ORDER);
    $link_id = 1;
    $links = [];
    foreach ($m as $a_tag) {
        $tag = $a_tag[0];
        $link = $a_tag[1];
        $text = $a_tag[2];
        $text = trim($text);
        if (in_array($link, $links)) {
            $_link_id = array_search($link, $links);
            $content = str_replace($tag, " " . $text . " [*" . $_link_id . "] ", $content);
            continue;
        }
        $content = str_replace($tag, " " . $text . "[*" . $link_id . "] ", $content);
        $links[$link_id] = $link;
        $link_id++;
    }
    $content = strip_tags($content);
    $content = trim($content);

    $content .= "\n\n";
    foreach ($links as $link_id => $link) {
        $content .= "*" . $link_id . ": " . $link . "\n";
    }

    echo "[$id] $title```$content```$article_link\n";
    sendDiscordWebhook(":new:__**$title**__```$content```$article_link");

    $readed[] = $id;
}
file_put_contents(__DIR__ . "/hamikuri_readed.json", json_encode($readed));