Web app vs CMS backend

The idea of birgire is interesting but this can already be done with a single post per user.

Create users with the role “Contributor” and then each user create a post with this content

button 1 text
a sentence, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

button 2 text
a big sentence ………

and then the page with the button is generated with this plugin :

<?php
/*
Plugin Name: One Sentence to bring them all and in the darkness bind them
Version: 1
*/

if (!function_exists("add_action")) {
    echo "plugin";
    exit();
}



add_action("admin_menu", function () {

    $current_user = wp_get_current_user();

    if (!in_array("contributor", $current_user->roles)) {
        return;
    }


    add_menu_page(
          "Sentences"
        , "Sentences"
        , "read" //, "manage_options"
        , "Sentences"
        , function () {
            do_action("OneSentence/Sentences");
        }
        , NULL
        , 0
    );


});


add_action("OneSentence/Sentences", function () {


    $current_user = wp_get_current_user();


    $posts = get_posts([
        "author" => $current_user->ID,
        "post_status" => "pending",
        "orderby" => "ID",
        "order" => "ASC",
        "posts_per_page" => 1,
    ]);


    if (!isset($posts[0])) {
        return;
    }

    ?>
        <div>
            When the button have a green background, the sentence is in the clipboard and can be past everywhere.
        </div>
    <?php

    $text = $posts[0]->post_content;

    $tab1 = explode("&nbsp;", $text);


    foreach ($tab1 as $e) {

        $e = trim($e);

        if (empty($e)) {
            continue;
        }

        $tab2 = explode("\n", $e);

        $bouton_text = trim($tab2[0]);
        $content = trim($tab2[2]);

        ?>

            <button
                class="button_sentence"
                data-content="<?php echo htmlspecialchars($content);?>"
            >
                <?php echo htmlspecialchars($bouton_text);?></button>

        <?php


    } // END foreach ($tab1 as $e) {


    ?>
    <script>

        $ = jQuery;

        $(function () {

            //console.clear();

            $(".button_sentence").click(function () {

                $(".button_sentence").css("background", "initial");


                let element = $(this);

                let textarea = document.createElement("textarea");
                textarea.textContent = element.data("content");
                document.body.appendChild(textarea);
                textarea.select();

                try {

                    document.execCommand("copy");

                    element.css("background", "green");

                } catch (ex) {
                    console.warn("Copy to clipboard failed.", ex);
                    return false;
                } finally {
                    document.body.removeChild(textarea);
                }



            });



        });

    </script>
    <?php


}); // END add_action("OneSentence/Sentences", function () {