pokemon/src/pages/partials/cards.astro

---
import { client } from '../../db/typesense';
import RarityIcon from '../../components/RarityIcon.astro';
import FirstEditionIcon from "../../components/FirstEditionIcon.astro";
export const prerender = false;

import * as util from 'util';


// all the facet fields we want to use for filtering
const facetFields:any = {
    //"productLineName": "Product Line",
    "setName": "Set",
    "variant": "Variant",
    "rarityName": "Rarity",
    "cardType": "Card Type",
    "energyType": "Energy Type"
}

// ── Allowed sort values ───────────────────────────────────────────────────
const sortMap: Record<string, string> = {
    'releaseDate:desc,number:asc': '_text_match:asc,releaseDate:desc,number:asc',
    'releaseDate:asc,number:asc':  '_text_match:asc,releaseDate:asc,number:asc',
    'marketPrice:desc':            'marketPrice:desc,releaseDate:desc,number:asc',
    'marketPrice:asc':             'marketPrice:asc,releaseDate:desc,number:asc',
    'number:asc':                  '_text_match:asc,number:asc',
    'number:desc':                 '_text_match:asc,number:desc',
};
const DEFAULT_SORT = '_text_match:asc,releaseDate:desc,number:asc';

// get the query from post request using form data
const formData = await Astro.request.formData();
const query = formData.get('q')?.toString() || '';
const start = Number(formData.get('start')?.toString() || '0');
const sortKey = formData.get('sort')?.toString() || '';
const resolvedSort = sortMap[sortKey] ?? DEFAULT_SORT;

// ── Language filter ───────────────────────────────────────────────────────
// Expects a `language` field on your card documents in Typesense.
// Valid values: 'en', 'jp' — anything else (or 'all') means no filter.
const language = formData.get('language')?.toString() || 'all';
const languageFilter = language === 'en' ? " && productLineName:=`Pokemon`"
                     : language === 'jp' ? " && productLineName:=`Pokemon Japan`"
                     : '';

// ── Query alias expansion ─────────────────────────────────────────────────
// Intercepts known shorthand queries that can't be handled by Typesense
// synonyms alone (e.g. terms that need to match across multiple set names)
// and rewrites them into a direct filter, clearing the query so it doesn't
// also try to text-match against card names.
const EREADER_SETS = ['Expedition Base Set', 'Aquapolis', 'Skyridge', 'Battle-e'];
const EREADER_RE = /^(e-?reader|e reader)$/i;

let resolvedQuery = query;
let queryFilter = '';

if (EREADER_RE.test(query.trim())) {
    resolvedQuery = '';
    queryFilter = `setName:=[${EREADER_SETS.map(s => '`' + s + '`').join(',')}]`;
}

const filters = Array.from(formData.entries())
    .filter(([key]) => key !== 'q' && key !== 'start' && key !== 'sort' && key !== 'language')
    .reduce((acc, [key, value]) => {
        if (!acc[key]) {
            acc[key] = [];
        }
        acc[key].push(value.toString());
        return acc;
    }, {} as Record<string, string[]>);

const filterChecked = (field: string, value: string) => {
    return (filters[field]?.includes(value) ?? false) ? 'checked' : '';
};

const filterBy = Object.entries(filters).map(([field, values]) => {
    return `${field}:=[${values.map(v => '`'+v+'`').join(',')}]`;
}).join(' && ');

const facetFilter = (facet:string) => {
    const otherFilters = Object.entries(filters)
        .filter(([field]) => field !== facet)
        .map(([field, values]) => `${field}:=[${values.map(v => '`'+v+'`').join(',')}]`)
        .join(' && ');
    // Language filter is always included so facet counts stay accurate
    return `sealed:false${languageFilter}${queryFilter ? ` && ${queryFilter}` : ''}${otherFilters ? ` && ${otherFilters}` : ''}`;
};


// primary search values (for cards)
let searchArray = [{
    collection: 'cards',
    filter_by: `sealed:false${languageFilter}${queryFilter ? ` && ${queryFilter}` : ''}${filterBy ? ` && ${filterBy}` : ''}`,
    per_page: 20,
    facet_by: '',
    max_facet_values: 0,
    page: Math.floor(start / 20) + 1,
    sort_by: resolvedSort,
    include_fields: '$skus(*)',
}];

// on first load (start === 0) we want to get the facets for the filters
if (start === 0) {
    for (const facet of Object.keys(facetFields)) {
        searchArray.push({
            collection: 'cards',
            filter_by: facetFilter(facet),
            per_page: 0,
            facet_by: facet,
            max_facet_values: 500,
            page: 1,
            sort_by: '',
            include_fields: '',
        });
    }
}

const searchRequests = { searches: searchArray };
const commonSearchParams = {
    q: resolvedQuery,
    query_by: 'content,setName,productLineName,rarityName,energyType,cardType'
};

// use typesense to search for cards matching the query and return the productIds of the results
const searchResults = await client.multiSearch.perform(searchRequests, commonSearchParams);
const cardResults = searchResults.results[0] as any;

const pokemon = cardResults.hits?.map((hit: any) => hit.document) ?? [];
const totalHits = cardResults?.found;


// format price to 2 decimal places (or 0 if price >=100) and adds a $ sign, if the price is null it returns "–"
const formatPrice = (condition:string, skus: any) => {
    const sku:any = skus.find((price:any) => price.condition === condition);
    if (typeof sku === 'undefined' || typeof sku.marketPrice === 'undefined') return '—';

    const price = Number(sku.marketPrice) / 100.0;
    if (price > 99.99)  return `$${Math.round(price)}`;
    return `$${price.toFixed(2)}`;
};

const conditionOrder = ["Near Mint", "Lightly Played", "Moderately Played", "Heavily Played", "Damaged"];
const conditionShort = (condition:string) => {
    return {
        "Near Mint": "NM",
        "Lightly Played": "LP",
        "Moderately Played": "MP",
        "Heavily Played": "HP",
        "Damaged": "DMG"
    }[condition] || condition.split(' ').map((w) => w[0]).join('');
}

const facetNames = (name:string) => {
    return facetFields[name] || name;
}

const facets = searchResults.results.slice(1).map((result: any) => {
    const facet = result.facet_counts?.[0];
    if (!facet) return null;
    
    // Sort: checked items first, then alphabetically
    facet.counts = facet.counts.sort((a: any, b: any) => {
        const aChecked = filters[facet.field_name]?.includes(a.value) ?? false;
        const bChecked = filters[facet.field_name]?.includes(b.value) ?? false;
        if (aChecked && !bChecked) return -1;
        if (!aChecked && bChecked) return 1;
        return a.value.localeCompare(b.value);
    });
    
    return facet;
}).filter(Boolean);

---

{(start === 0) &&

    <div id="facetContainer" hx-swap-oob="true">
        <div class="bg-dark sticky-top p-2 d-flex justify-content-end align-items-center">
            <button type="button" data-bs-dismiss="offcanvas" class="btn btn-danger me-2" id="clear-filters">Clear</button>
            <button type="submit" form="searchform" data-bs-dismiss="offcanvas" class="btn btn-success">Apply Filters</button>
        </div>
        {facets.map((facet) => (
            <div class="mt-2 mb-4 facet-group row align-items-center justify-content-between">
                <div class="fs-5 m-0 col-auto pb-1 border-bottom border-light-subtle">{facetNames(facet.field_name)}</div>
                {(facet.counts.length > 20) &&
                    <input class="facet-filter form-control col-auto me-3" type="text" id={`filter_${facet.field_name}`} placeholder="Search..." />
                }
                <div class="facet-list col-12 mt-2">
                    {facet.counts.map((count:any) => (
                        <div class="facet-item form-check form-switch" data-facet-value={count.value.toLowerCase()}>
                            <label class="form-check-label fs-7">
                                <input type="checkbox" name={facet.field_name} value={count.value} checked={filterChecked(facet.field_name, count.value)} class="form-check-input" form="searchform" />
                                {count.value} <span class="badge text-bg-light align-baseline">{count.count}</span>
                            </label>
                        </div>
                    ))}
                </div>
            </div>
        ))}
    </div>
    <div id="sortBy" class="d-flex flex-fill align-items-center me-auto gap-2" hx-swap-oob="true">
        <div class="dropdown">
            <button class="btn btn-sm btn-dark dropdown-toggle" data-bs-toggle="dropdown" aria-expanded="false">Sort by</button>
            <ul class="dropdown-menu dropdown-menu-dark">
                <li><a class="dropdown-item sort-option" href="#" data-sort="releaseDate:desc,number:asc" data-label="Set: Newest to Oldest">Set: Newest to Oldest</a></li>
                <li><a class="dropdown-item sort-option" href="#" data-sort="releaseDate:asc,number:asc"  data-label="Set: Oldest to Newest">Set: Oldest to Newest</a></li>
                <li><a class="dropdown-item sort-option" href="#" data-sort="marketPrice:desc"            data-label="Price: High to Low">Price: High to Low</a></li>
                <li><a class="dropdown-item sort-option" href="#" data-sort="marketPrice:asc"             data-label="Price: Low to High">Price: Low to High</a></li>
                <li><a class="dropdown-item sort-option" href="#" data-sort="number:asc"                  data-label="Card Number: Ascending">Card Number: Ascending</a></li>
                <li><a class="dropdown-item sort-option" href="#" data-sort="number:desc"                 data-label="Card Number: Descending">Card Number: Descending</a></li>
            </ul>
        </div>
        <span id="sortLabel" class="ms-1 text-secondary small">{sortKey ? ({"releaseDate:desc,number:asc":"Set: Newest to Oldest","releaseDate:asc,number:asc":"Set: Oldest to Newest","marketPrice:desc":"Price: High to Low","marketPrice:asc":"Price: Low to High","number:asc":"Card Number: Ascending","number:desc":"Card Number: Descending"}[sortKey] ?? '') : ''}</span>
        <div class="btn-group btn-group-sm ms-2 flex-shrink-0" role="group" aria-label="Language filter">
            <button type="button" class={`btn btn-dark language-btn${language === 'all' ? ' active' : ''}`} data-lang="all">All</button>
            <button type="button" class={`btn btn-dark language-btn${language === 'en'  ? ' active' : ''}`} data-lang="en">EN</button>
            <button type="button" class={`btn btn-dark language-btn${language === 'jp'  ? ' active' : ''}`} data-lang="jp">JP</button>
        </div>
    </div>
    <div id="totalResults" class="d-flex text-secondary small d-none align-items-center" hx-swap-oob="true">
        {totalHits} {totalHits === 1 ? ' result' : ' results'}
    </div>
    <div id="activeFilters" class="d-flex small ms-auto align-items-center" hx-swap-oob="true">
        {(Object.entries(filters).length > 0) && 
        <span class="me-1 small">Filtered by:</span>
        <ul class="list-group list-group-horizontal">
            {Object.entries(filters).map(([filter, values]) => (
                values.map((value) => (
                    <li data-facet={filter} data-value={value} class="list-group-item small p-2 remove-filter">{value}</li>
                ))
            ))}
        </ul>
        <span class="ms-2"><button type="button" class="btn-close" aria-label="Clear all filters" id="clear-all-filters"></button></span>
        }
    </div>
    <script define:vars={{ totalHits, filters, facets }} is:inline>

        // Filter the facet values to make things like Set easier to find
        const facetfilters = document.querySelectorAll('.facet-filter');
        for (const facetfilter of facetfilters) {
            const facetgroup = facetfilter.closest('.facet-group');
            const facetlist = facetgroup.querySelector('.facet-list');
            const facetitems = facetlist.querySelectorAll('.facet-item');
            facetfilter.addEventListener('input', (e) => {
                const match = e.target.value.toLowerCase();
                for (const item of facetitems) {
                    const text = item.getAttribute('data-facet-value');
                    if (text.includes(match)) item.style.display = ''; // Show
                    else item.style.display = 'none'; // Hide
                }
            });
        }
        
        // Clear all facets and resubmit the form with only the text box
        const clearAllFilters = (e) => {
            const facetContainer = document.getElementById('facetContainer');
            for (const item of facetContainer.querySelectorAll('input[type=checkbox]')) {
                item.checked = false;
            }
            document.getElementById('searchform').dispatchEvent(new Event('submit', {bubbles:true, cancelable:true}));
        }
        document.getElementById('clear-filters').addEventListener('click', (e) => clearAllFilters(e));
        document.getElementById('clear-all-filters').addEventListener('click', (e) => clearAllFilters(e));

        // Remove single facet value
        for (const li of document.querySelectorAll('.remove-filter')) {
            li.addEventListener('click', (e) => {
                const filter = li.getAttribute('data-facet');
                const value = li.getAttribute('data-value');
                document.querySelector(`.form-check-input[name="${filter}"][value="${value}"]`).checked = false;
                document.getElementById('searchform').dispatchEvent(new Event('submit', {bubbles:true, cancelable:true}));
            });
        }

    </script>
}

{pokemon.length === 0 && (
    <div id="notfound" hx-swap-oob="true">
        Pokemon not found
    </div>
)}

{pokemon.map((card:any) => (
    <div class="col">
        <div class="inventory-button position-relative float-end shadow-filter text-center d-none">
            <div class="inventory-label pt-2">+/-</div>
        </div>
        <div class="card-trigger position-relative" data-card-id={card.cardId} hx-get={`/partials/card-modal?cardId=${card.cardId}`} hx-target="#cardModal" hx-trigger="click" data-bs-toggle="modal" data-bs-target="#cardModal" onclick="const cardTitle = this.querySelector('#cardImage').getAttribute('alt'); dataLayer.push({'event': 'virtualPageview', 'pageUrl': this.getAttribute('hx-get'), 'pageTitle': cardTitle, 'previousUrl': '/pokemon'});">
            <div class="image-grow rounded-4 card-image" data-energy={card.energyType} data-rarity={card.rarityName} data-variant={card.variant} data-name={card.productName}><img src={`/cards/${card.productId}.jpg`} alt={card.productName} id="cardImage" loading="lazy" decoding="async" class="img-fluid rounded-4 mb-2 w-100" onerror="this.onerror=null; this.src='/cards/default.jpg'; this.closest('.image-grow')?.setAttribute('data-default','true')"/><span class="position-absolute top-50 start-0 d-inline medium-icon"><FirstEditionIcon edition={card?.variant} /></span></div>
        </div>
        <div class="row row-cols-5 gx-1 price-row mb-2">
            {conditionOrder.map((condition) => (
                <div class="col price-label ps-1">
                    { conditionShort(condition) }
                    <br />{formatPrice(condition, card.skus)}
                </div>
            ))}
        </div>
        <div class="h5 my-0">{card.productName}</div>
        <div class="d-flex flex-row lh-1 mt-1 justify-content-between">
            <div class="text-secondary flex-grow-1 d-none d-lg-flex">{card.setName}</div>
            <div class="text-body-tertiary">{card.number}</div>
            <span class="ps-2 small-icon"><RarityIcon rarity={card.rarityName} /></span>
        </div>
        <div class="text-body-tertiary">{card.variant}</div><span class="d-none">{card.productId}</span>
    </div>

))}
{start + 20 < totalHits &&
    <div hx-post="/partials/cards" hx-trigger="revealed" hx-include="#searchform" hx-target="#cardGrid" hx-swap="beforeend" hx-on--after-request="afterUpdate(event)">
        Loading...
    </div>
}