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Fibonacci.java

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<body class="article toc2 toc-left">
<div id="header">
<h1>ALOM - TP 10 - Practice even more !</h1>
    <div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_présentation_et_objectifs">1. Présentation et objectifs</a></li>
<li><a href="#_game_ui">2. <code>game-ui</code></a>
<ul class="sectlevel2">
<li><a href="#_ecran_de_combat">2.1. Ecran de combat !</a>
<ul class="sectlevel3">
<li><a href="#_le_controlleur">2.1.1. Le controlleur</a></li>
</ul>
</li>
<li><a href="#_cross_origin_sur_battle_api">2.2. Cross Origin sur Battle-API</a>
<ul class="sectlevel3">
<li><a href="#_configuration">2.2.1. Configuration</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#_gain_dxp">3. Gain d&#8217;XP</a></li>
<li><a href="#_la_boutique">4. La boutique</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_présentation_et_objectifs"><a class="anchor" href="#_présentation_et_objectifs"></a><a class="link" href="#_présentation_et_objectifs">1. Présentation et objectifs</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Le but est de continuer le développement de notre architecture "à la microservice".</p>
</div>
<div class="paragraph">
<p>Nous allons :</p>
</div>
<div class="ulist">
<ul>
<li>
<p>continuer (ou commencer) le développpement de notre micro-service de combat !</p>
</li>
<li>
<p>développer un micro-service de boutique</p>
</li>
</ul>
</div>
<div class="imageblock">
<div class="content">
<img src="images/battle-architecture.png" alt="battle architecture">
</div>
<div class="title">Figure 1. Notre architecture !</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_game_ui"><a class="anchor" href="#_game_ui"></a><a class="link" href="#_game_ui">2. <code>game-ui</code></a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_ecran_de_combat"><a class="anchor" href="#_ecran_de_combat"></a><a class="link" href="#_ecran_de_combat">2.1. Ecran de combat !</a></h3>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Cette partie nécessite d&#8217;avoir un projet <code>battle-api</code> complètement fonctionnel.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Pour vous faciliter le travail, j&#8217;ai développé pour vous un écran simple de combat, ainsi qu&#8217;un javascript (vanilla), qui requête en AJAX l&#8217;api <code>/battles</code> et permet de jouer un combat !</p>
    </div>
<div class="imageblock">
<div class="content">
<img src="images/combat.png" alt="combat">
</div>
<div class="title">Figure 2. Un combat en cours !</div>
</div>
<div class="paragraph">
<p>Le JS est disponible ici : <a href="battle.js" target="_blank" rel="noopener">battle.js</a>.</p>
</div>
<div class="paragraph">
<p>L&#8217;image de fond est disponible ici : <a href="images/battle_background.png" target="_blank" rel="noopener">battle_background.png</a>.</p>
</div>
<div class="paragraph">
<p>L&#8217;écran de jeu est défini en template mustache via le code suivant :</p>
</div>
<div class="listingblock">
<div class="title">fight.html</div>
<div class="content">
<pre class="rouge highlight nowrap"><code data-lang="xml"><span class="cp">&lt;!doctype html&gt;</span>
<span class="nt">&lt;html</span> <span class="na">lang=</span><span class="s">"en"</span><span class="nt">&gt;</span>
<span class="nt">&lt;head&gt;</span>
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    <span class="nt">&lt;title&gt;</span>Pokemon Manager<span class="nt">&lt;/title&gt;</span>

    <span class="nt">&lt;link</span> <span class="na">rel=</span><span class="s">"stylesheet"</span> <span class="na">href=</span><span class="s">"https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"</span> <span class="na">integrity=</span><span class="s">"sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;</span>
    <span class="nt">&lt;link</span> <span class="na">rel=</span><span class="s">"stylesheet"</span> <span class="na">href=</span><span class="s">"https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css"</span><span class="nt">&gt;</span>
<span class="nt">&lt;/head&gt;</span>

<span class="nt">&lt;body&gt;</span>

<span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"container"</span><span class="nt">&gt;</span>
    <span class="nt">&lt;h1</span> <span class="na">class=</span><span class="s">"pt-md-5 pb-md-5"</span><span class="nt">&gt;</span>Arena <span class="nt">&lt;img</span> <span class="na">src=</span><span class="s">"/icons/fist.png"</span> <span class="na">style=</span><span class="s">"width: 32px;"</span><span class="nt">/&gt;&lt;/h1&gt;</span>

    <span class="nt">&lt;h2&gt;</span>{{trainerName}} Vs {{opponentName}}<span class="nt">&lt;/h2&gt;</span>

    <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"gameZone"</span> <span class="na">style=</span><span class="s">"width: 800px; height: 480px; position:relative; margin: auto; background: url('/images/battle_background.png')"</span><span class="nt">&gt;</span>

        <span class="nt">&lt;img</span> <span class="na">id=</span><span class="s">"{{trainerName}}-pokemon-img"</span> <span class="na">style=</span><span class="s">"position:absolute;  width: 300px; left: 0px; bottom: 0px;"</span><span class="nt">/&gt;</span>
        <span class="nt">&lt;img</span> <span class="na">id=</span><span class="s">"{{opponentName}}-pokemon-img"</span> <span class="na">style=</span><span class="s">"position:absolute; width: 200px; right: 100px; top: 100px;"</span><span class="nt">/&gt;</span>

        <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"card bg-light"</span> <span class="na">style=</span><span class="s">"width: 18rem; position:absolute; bottom:10px; right: 10px; "</span><span class="nt">&gt;</span>
            <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"card-body"</span><span class="nt">&gt;</span>
                <span class="nt">&lt;h5</span> <span class="na">class=</span><span class="s">"card-title"</span> <span class="na">id=</span><span class="s">"{{trainerName}}-pokemon-name"</span><span class="nt">&gt;&lt;/h5&gt;</span>
                <span class="nt">&lt;p&gt;</span>
                    <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"progress"</span><span class="nt">&gt;</span>
                        <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"progress-bar"</span> <span class="na">id=</span><span class="s">"{{trainerName}}-pokemon-hp"</span> <span class="na">role=</span><span class="s">"progressbar"</span> <span class="na">style=</span><span class="s">"width: 0%;"</span> <span class="na">aria-valuenow=</span><span class="s">"0"</span> <span class="na">aria-valuemin=</span><span class="s">"0"</span> <span class="na">aria-valuemax=</span><span class="s">"100"</span><span class="nt">&gt;&lt;/div&gt;</span>
                    <span class="nt">&lt;/div&gt;</span>
                <span class="nt">&lt;/p&gt;</span>

                <span class="nt">&lt;button</span> <span class="na">class=</span><span class="s">"btn btn-danger"</span> <span class="na">id=</span><span class="s">"attack-btn"</span> <span class="na">onclick=</span><span class="s">"playerCommand('ATTACK');"</span><span class="nt">&gt;</span>Attack<span class="nt">&lt;/button&gt;</span>
            <span class="nt">&lt;/div&gt;</span>
        <span class="nt">&lt;/div&gt;</span>

        <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"card bg-light"</span> <span class="na">style=</span><span class="s">"width: 18rem; position:absolute; top: 10px; left: 10px;"</span><span class="nt">&gt;</span>
            <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"card-body"</span><span class="nt">&gt;</span>
                <span class="nt">&lt;h5</span> <span class="na">class=</span><span class="s">"card-title"</span> <span class="na">id=</span><span class="s">"{{opponentName}}-pokemon-name"</span><span class="nt">&gt;&lt;/h5&gt;</span>
                <span class="nt">&lt;p&gt;</span>
                    <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"progress"</span><span class="nt">&gt;</span>
                        <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"progress-bar"</span> <span class="na">id=</span><span class="s">"{{opponentName}}-pokemon-hp"</span> <span class="na">role=</span><span class="s">"progressbar"</span> <span class="na">style=</span><span class="s">"width: 0%;"</span> <span class="na">aria-valuenow=</span><span class="s">"0"</span> <span class="na">aria-valuemin=</span><span class="s">"0"</span> <span class="na">aria-valuemax=</span><span class="s">"100"</span><span class="nt">&gt;&lt;/div&gt;</span>
                    <span class="nt">&lt;/div&gt;</span>
                <span class="nt">&lt;/p&gt;</span>
            <span class="nt">&lt;/div&gt;</span>
        <span class="nt">&lt;/div&gt;</span>

    <span class="nt">&lt;/div&gt;</span>

    <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"card card-body"</span> <span class="na">id=</span><span class="s">"message"</span> <span class="na">style=</span><span class="s">"width: 800px; margin: auto;"</span><span class="nt">&gt;</span>
        <span class="nt">&lt;/div&gt;</span>

<span class="nt">&lt;/div&gt;</span>

<span class="nt">&lt;script</span> <span class="na">src=</span><span class="s">"https://code.jquery.com/jquery-3.4.1.min.js"</span> <span class="na">integrity=</span><span class="s">"sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;&lt;/script&gt;</span>

<span class="nt">&lt;script</span> <span class="na">src=</span><span class="s">"/scripts/battle.js"</span> <span class="na">type=</span><span class="s">"application/ecmascript"</span><span class="nt">&gt;&lt;/script&gt;</span>

<span class="nt">&lt;script</span> <span class="na">type=</span><span class="s">"application/ecmascript"</span><span class="nt">&gt;</span>
    $( document ).ready(function() {
        startBattle("{{trainerName}}", "{{opponentName}}");
    });

<span class="nt">&lt;/script&gt;</span>

<span class="nt">&lt;/body&gt;</span>
<span class="nt">&lt;/html&gt;</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Le template a besoin de 2 variables : <code>trainerName</code> et <code>opponentName</code>.</p>
</div>
<div class="paragraph">
<p>Le fichier <code>battle.js</code> doit être déposé dans <code>src/main/resources/static/scripts</code>.
L&#8217;image de fond doit être déposée dans <code>src/main/resources/static/images</code>.</p>
</div>
<div class="paragraph">
<p>Le combat utilise <code>Bootstrap</code>, <code>JQuery</code> et <code>Animate.css</code>.</p>
</div>
<div class="sect3">
<h4 id="_le_controlleur"><a class="anchor" href="#_le_controlleur"></a><a class="link" href="#_le_controlleur">2.1.1. Le controlleur</a></h4>
<div class="paragraph">
<p>Le controlleur servant cet écran peut être codé de cette manière :</p>
</div>
<div class="listingblock">
<div class="title">BattleController.java</div>
<div class="content">
<pre class="rouge highlight nowrap"><code data-lang="java"><table class="linenotable"><tbody><tr><td class="linenos gl"><pre class="lineno">1
2
3
4
5
6
7
8
9
</pre></td><td class="code"><pre><span class="nd">@GetMapping</span><span class="o">(</span><span class="s">"/fight/{opponent}"</span><span class="o">)</span>
<span class="kd">public</span> <span class="nc">ModelAndView</span> <span class="nf">fight</span><span class="o">(</span><span class="nc">Principal</span> <span class="n">principal</span><span class="o">,</span> <span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">opponent</span><span class="o">){</span>
    <span class="kt">var</span> <span class="n">modelAndView</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ModelAndView</span><span class="o">(</span><span class="s">"fight"</span><span class="o">);</span>

    <span class="n">modelAndView</span><span class="o">.</span><span class="na">addObject</span><span class="o">(</span><span class="s">"trainerName"</span><span class="o">,</span> <span class="n">principal</span><span class="o">.</span><span class="na">getName</span><span class="o">());</span>
    <span class="n">modelAndView</span><span class="o">.</span><span class="na">addObject</span><span class="o">(</span><span class="s">"opponentName"</span><span class="o">,</span> <span class="n">opponent</span><span class="o">);</span>

    <span class="k">return</span> <span class="n">modelAndView</span><span class="o">;</span>
<span class="o">}</span>
</pre></td></tr></tbody></table></code></pre>
</div>
</div>
<div class="paragraph">
<p>De cette manière, on peut déclencher un combat en se rendant sur l&#8217;URL <a href="http://localhost:9000/fight/Misty" class="bare" target="_blank" rel="noopener">http://localhost:9000/fight/Misty</a></p>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_cross_origin_sur_battle_api"><a class="anchor" href="#_cross_origin_sur_battle_api"></a><a class="link" href="#_cross_origin_sur_battle_api">2.2. Cross Origin sur Battle-API</a></h3>
<div class="paragraph">
<p>Le script <code>battle.js</code> appelle l&#8217;API battle. Cette API est appelée en <code>Cross-Origin</code>.
Du point de vue du navigateur web (firefox/chrome), l&#8217;origine est composée :</p>
</div>
<div class="ulist">
    <ul>
<li>
<p>du scheme (ex: http/https)</p>
</li>
<li>
<p>de l&#8217;hôte (ex: localhost)</p>
</li>
<li>
<p>du port (ex: 9000/8080&#8230;&#8203;)</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Lorsqu&#8217;une requête est émise vers une autre origine que celle de la page affichée, le navigateur
exécute tout d&#8217;abord une requête <code>HEAD</code>, pour demander au serveur s&#8217;il accepte d&#8217;être appelé
depuis une autre origine que lui-même. C&#8217;est une mécanique de sécurité permettant d&#8217;éviter
les appels indésirables sur une API.</p>
</div>
<div class="paragraph">
<p>Nous devons donc activer le support du <code>Cross-Origin</code> sur notre API battle, pour qu&#8217;elle
accepte les requêtes provenant du navigateur web.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
Nous n&#8217;avons à gérer le <code>Cross-Origin</code> uniquement quand c&#8217;est un navigateur qui est la source d&#8217;une requête.
Pas besoin de <code>Cross-Origin</code> pour les appels entre APIs.
</td>
</tr>
</table>
</div>
<div class="sect3">
<h4 id="_configuration"><a class="anchor" href="#_configuration"></a><a class="link" href="#_configuration">2.2.1. Configuration</a></h4>
<div class="paragraph">
<p>La configuration du <code>Cross-Origin</code> en Spring se fait en ajoutant l&#8217;annotation <code>@CrossOrigin</code> sur les controlleurs ou méthodes
à autoriser.
Ajoutez cette annotation sur le controlleur de votre <code>battle-api</code>.</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_gain_dxp"><a class="anchor" href="#_gain_dxp"></a><a class="link" href="#_gain_dxp">3. Gain d&#8217;XP</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Avec l&#8217;arrivée des combats, on constate que les statistiques de nos chers Pokemon sont importantes.
Les combats successifs mettent les Pokemon et leurs dresseurs à rude épreuve.</p>
</div>
<div class="paragraph">
<p>Ajoutez la statistique "experience" aux Pokemon, dans l&#8217;API Trainer.
La statistique "level" devient une propriété calculée.</p>
</div>
<div class="paragraph">
<p>Le niveau du Pokemon "level" est la racine cubique du nombre de points d&#8217;expérience (arrondi à l&#8217;inférieur).
À l&#8217;inverse, un pokemon d&#8217;un certain niveau possède en points d&#8217;expérience la valeur du niveau au cube.</p>
</div>
<div class="paragraph">
<p>Par exemple, Ondine (Misty), possède un Stari et un Staross, de niveaux 18 et 21.
Stari a donc 18³ points d&#8217;expérience, soit 5832.
Staross a 21³ points d&#8217;xp, soit 9261.</p>
</div>
<div class="paragraph">
<p>Avec 6245 points d&#8217;expérience, Pikachu est au niveau 18 également. Pour passer au niveau 19, il lui faudra 19³-6245 points d&#8217;XP supplémentaire.</p>
</div>
<div class="paragraph">
    <p>Les niveaux des Pokemon sont limités à 100 pour un nombre d&#8217;XP maximum de 1 000 000.</p>
</div>
<div class="paragraph">
<p>Le gain d&#8217;expérience lors d&#8217;un combat est régi par la formule suivante :</p>
</div>
<div class="paragraph">
<p><code>1.5*(baseExperience)*(level pokemon vaincu)</code></p>
</div>
<div class="paragraph">
<p>Quand Pikachu met KO le Stari d&#8217;Ondine, il gagne <code>1.5 * 112 * 18 = 3024</code> points d&#8217;expérience</p>
</div>
<div class="paragraph">
<p>L&#8217;expérience des Pokemon grandi à chaque combat, et leur niveau avec.</p>
</div>
<div class="paragraph">
<p>Dans l&#8217;API Battle, lorsqu&#8217;un Pokemon en met KO un autre, modifiez l&#8217;expérience du Pokemon qui a gagné avec ces formules,
et sauvegardez la nouvelle information dans l&#8217;API Trainer (via un PUT HTTP)</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_la_boutique"><a class="anchor" href="#_la_boutique"></a><a class="link" href="#_la_boutique">4. La boutique</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Le lien pour créer le squelette de votre projet sur GitLab est le suivant : <a href="https://gitlab-classrooms.cleverapps.io/assignments/8c429976-236d-42f8-9450-4905167ab962/accept" class="external" target="_blank" rel="noopener">GitLab Classrooms</a>.</p>
</div>
<div class="paragraph">
<p>Les dresseurs de Pokemon ont un portefeuille virtuel composé de Poké-Dollar 💰.</p>
</div>
<div class="paragraph">
<p>Ils peuvent créditer leur portefeuille en achetant des Poké-Dollar, au taux de change d'1 euro pour 20 000 💰.
Chaque dresseur démarre avec la somme de 10 000 💰 offerts.
Un dresseur qui se crée un compte, peut aussi également choisir un Pokemon offert parmi les 3 starters (id 1, 4, 7).</p>
</div>
<div class="paragraph">
<p>Une boutique leur permet :</p>
</div>
<div class="ulist">
<ul>
<li>
<p>d&#8217;acheter des Pokeballs contenant des Pokemon aléatoires !</p>
</li>
<li>
<p>d&#8217;acheter des bonbons pour augmenter le niveau d&#8217;un Pokemon !</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Voici quelques objets disponibles dans la boutique:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 33.3334%;">
</colgroup>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Super Bonbon</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Augmente le niveau d&#8217;un Pokemon !</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">5 000 💰</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pokeball</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Contient un Pokemon aléatoire commun de niveau 5</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">10 000 💰</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">SuperBall</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Contient un Pokemon aléatoire non-commun de niveau 10</p></td>
    <td class="tableblock halign-left valign-top"><p class="tableblock">25 000 💰</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">HyperBall</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Contient un Pokemon aléatoire rare de niveau 20</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">50 000 💰</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">MasterBall</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Contient un Pokemon aléatoire légendaire (un seul achat max par dresseur) de niveau 40</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">100 000 💰</p></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>L&#8217;achat d&#8217;une PokeBall, SuperBall, HyperBall ou MasterBall a pour effet d&#8217;ajouter le Pokemon à la liste des Pokemon du dresseur, avec le niveau 5.</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<caption class="title">Table 1. Ids de rareté des Pokémon (probabilités égales pour chaque id)</caption>
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pokemons communs</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">10 13 16 19 41 133 48 43 129 96 52 21 69 46 98 116</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pokemons non-communs</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">35 32 29 23 104 118 60 90 39 81 92 102 79 54 124 120 72 132</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pokemons rares</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">147 58 74 95 77 37 109 27 126 63 25 125 66 88 111 100 108 123 127 114 138 140</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Pokemons légendaires</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">144 145 146 150 151</p></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>La boutique doit :</p>
</div>
<div class="ulist">
<ul>
<li>
<p>gérer le portefeuille de chaque dresseur, et lui permettre de l&#8217;approvisionner via une API REST</p>
</li>
<li>
<p>exposer une API REST consommable par le <code>game-ui</code> pour afficher la liste des produits</p>
</li>
<li>
<p>mettre à jour l&#8217;équipe du dresseur lors d&#8217;un achat (avec un PUT REST)</p>
</li>
</ul>
</div>
</div>
</div>
</div>
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