Item pages describe the item (name, rarity, kind, its words, how many own it, how it is got) instead of its flavor text alone (#59)

ddiff --git a/server/http/pages.js b/server/http/pages.js
iindex c8a62cc..6d7a334 100644
---- a/server/http/pages.js
++++ b/server/http/pages.js
@@@ -56,6 +56,21 @@ function card(d, { href = `/items/${d.id}`, extra = '', owned = null, worn = fal
  </li>`;
  }
  
++/** An item page's meta description (≤ 160 characters): its name, rarity and kind, its own words, how many own it, how it is got. */
++function itemDescription(d, k) {
++    const what = `${d.name}, a ${RARITY_LABEL[d.rarity].toLowerCase()} ${k.name.toLowerCase()} on OpenVibe`;
++    const words = d.description ? ` "${String(d.description).replace(/\s+/g, ' ').trim().replace(/[.!?]+$/, '')}".` : '.';
++    const owned = Number(d.supply && d.supply.issued) || 0;
++    const supply = d.supply && d.supply.cap != null ? ` ${owned} of ${d.supply.cap} given.` : ` Owned by ${owned} ${owned === 1 ? 'person' : 'people'}.`;
++    const grantors = d.grantors || [];
++    const how = d.status !== 'published' ? ' No longer given.'
++        : grantors.includes('service:quest') ? ' Earned on OpenVibe.Quest.'
++        : grantors.includes('service:games') ? ' Earned on OpenVibe.Games.'
++        : ' Given by its issuer, never sold.';
++    const text = `${what}${words}${supply}${how}`;
++    return text.length <= 160 ? text : `${text.slice(0, 159).replace(/\s+\S*$/, '')}…`;
++}
++
  function createPageRoutes(ctx) {
      const { config, inv } = ctx;
      const r = asyncRouter();
@@@ -145,7 +160,8 @@ ${shown.map((k) => html`<section class="inv-kind" aria-labelledby="k-${k.id.repl
          page(req, res, {
              index: d.status === 'published', cache: signedIn(req) ? null : PUBLIC_CACHE,
              title: `${d.name} · ${RARITY_LABEL[d.rarity]} ${k.name.toLowerCase()}`,
--            description: d.description || `${d.name}, a ${RARITY_LABEL[d.rarity].toLowerCase()} ${k.name.toLowerCase()} on OpenVibe.`,
++            // What the item is, how many people own it and how it is got; its flavor text alone ("Angelic") said none of that.
++            description: itemDescription(d, k),
              body: html`<p class="crumbs"><a href="/items">Every item</a> › <a href="/items?kind=${encodeURIComponent(k.id)}">${k.name}</a></p>
  <div class="inv-detail r-${d.rarity}">
    ${art(d, { size: 'xl' })}
ddiff --git a/test/grantors.test.js b/test/grantors.test.js
iindex 6cc31b8..6179e69 100644
---- a/test/grantors.test.js
++++ b/test/grantors.test.js
@@@ -34,6 +34,12 @@ const { boot, check, done } = require('./helpers/boot');
              const cap = await t.get(`/items/${(await inv.byAlias('service:live', 'hat_crown')).id}`);
              assert.ok(!cap.text.includes('How to get it'), 'an item nobody else gives has no such section');
              assert.ok(cap.text.includes('Only its issuer can give this item'));
++            // Each item page describes itself: name, rarity and kind, how many own it, how it is got (≤ 160 characters).
++            const descOf = (html) => ((html.match(/<meta name="description" content="([^"]*)">/) || [])[1] || '').replace(/&quot;/g, '"').replace(/&#39;/g, "'");
++            assert.match(descOf(page.text), /^.+, an? (common|uncommon|rare|epic|legendary) .+ on OpenVibe[.: ].* (Owned by \d+ (person|people)|\d+ of \d+ given)\. Earned on OpenVibe\.Quest\.$/);
++            assert.match(descOf(golden.text), /Earned on OpenVibe\.Games\.$/);
++            assert.match(descOf(cap.text), /Given by its issuer, never sold\.$|…$/);
++            for (const html of [page.text, golden.text, cap.text]) assert.ok(descOf(html).length <= 160, descOf(html));
              const again = await require('../server/inventory/seed').seed(inv, { log: { log() {} } });
              assert.strictEqual(again.grantors, 0, 'a second boot changes nothing');
          });