From 0e66579f3685d723c408ed3b5d8e7508f27a607d Mon Sep 17 00:00:00 2001
From: svemagie <869694+svemagie@users.noreply.github.com>
Date: Sun, 8 Mar 2026 15:27:42 +0100
Subject: [PATCH] feat(where): add OwnYourSwarm checkins page and metadata

---
 .env.example                     |   6 +-
 .github/workflows/deploy.yml     |   6 +
 _data/whereCheckins.js           | 353 +++++++++++++++++++++++++++++++
 _includes/layouts/base.njk       |   2 +
 slashes.njk                      |   8 +
 theme/_data/whereCheckins.js     | 353 +++++++++++++++++++++++++++++++
 theme/_includes/layouts/base.njk |   2 +
 theme/slashes.njk                |  11 +-
 theme/where.njk                  | 131 ++++++++++++
 where.njk                        | 131 ++++++++++++
 10 files changed, 1001 insertions(+), 2 deletions(-)
 create mode 100644 _data/whereCheckins.js
 create mode 100644 theme/_data/whereCheckins.js
 create mode 100644 theme/where.njk
 create mode 100644 where.njk

diff --git a/.env.example b/.env.example
index d214757..d7a5d6a 100644
--- a/.env.example
+++ b/.env.example
@@ -25,4 +25,8 @@ ACTIVITYPUB_HANDLE=
 AUTHOR_AVATAR=/images/avatar.jpg
 AUTHOR_TITLE=
 AUTHOR_PRONOUN=
-SITE_LOCALE=de
\ No newline at end of file
+SITE_LOCALE=de
+
+# --- Where page (OwnYourSwarm/Swarm checkins) ---
+OWNYOURSWARM_FEED_URL=
+OWNYOURSWARM_FEED_TOKEN=
\ No newline at end of file
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 31909e4..80f3ebb 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -40,6 +40,8 @@ jobs:
           AUTHOR_TITLE: ${{ secrets.AUTHOR_TITLE }}
           AUTHOR_PRONOUN: ${{ secrets.AUTHOR_PRONOUN }}
           SITE_LOCALE: ${{ secrets.SITE_LOCALE }}
+          OWNYOURSWARM_FEED_URL: ${{ secrets.OWNYOURSWARM_FEED_URL }}
+          OWNYOURSWARM_FEED_TOKEN: ${{ secrets.OWNYOURSWARM_FEED_TOKEN }}
         run: |
           {
             printf 'SITE_URL=%s\n' "$SITE_URL"
@@ -59,6 +61,8 @@ jobs:
             printf 'AUTHOR_TITLE=%s\n' "$AUTHOR_TITLE"
             printf 'AUTHOR_PRONOUN=%s\n' "$AUTHOR_PRONOUN"
             printf 'SITE_LOCALE=%s\n' "$SITE_LOCALE"
+            printf 'OWNYOURSWARM_FEED_URL=%s\n' "$OWNYOURSWARM_FEED_URL"
+            printf 'OWNYOURSWARM_FEED_TOKEN=%s\n' "$OWNYOURSWARM_FEED_TOKEN"
           } > .env
 
       - name: Build site
@@ -76,6 +80,8 @@ jobs:
           GITHUB_USERNAME: ${{ secrets.GH_USERNAME }}
           MASTODON_INSTANCE: ${{ secrets.MASTODON_INSTANCE }}
           MASTODON_USER: ${{ secrets.MASTODON_USER }}
+          OWNYOURSWARM_FEED_URL: ${{ secrets.OWNYOURSWARM_FEED_URL }}
+          OWNYOURSWARM_FEED_TOKEN: ${{ secrets.OWNYOURSWARM_FEED_TOKEN }}
 
       - name: Deploy via SCP
         uses: appleboy/scp-action@v0.1.7
diff --git a/_data/whereCheckins.js b/_data/whereCheckins.js
new file mode 100644
index 0000000..dcf17a1
--- /dev/null
+++ b/_data/whereCheckins.js
@@ -0,0 +1,353 @@
+/**
+ * Where/Checkin data
+ *
+ * Fetches h-entry checkins from an OwnYourSwarm-connected endpoint.
+ * Expected payload: MF2 JSON with h-entry objects containing `checkin` and/or `location`.
+ */
+
+import EleventyFetch from "@11ty/eleventy-fetch";
+
+const FEED_URL = process.env.OWNYOURSWARM_FEED_URL || "https://ownyourswarm.p3k.io/";
+const FEED_TOKEN = process.env.OWNYOURSWARM_FEED_TOKEN || "";
+
+function first(value) {
+  if (Array.isArray(value)) return value[0];
+  return value;
+}
+
+function asText(value) {
+  if (value === null || value === undefined) return "";
+  if (typeof value === "string") return value;
+  if (typeof value === "number") return String(value);
+  if (typeof value === "object") {
+    if (typeof value.value === "string") return value.value;
+    if (typeof value.text === "string") return value.text;
+  }
+  return "";
+}
+
+function asNumber(value) {
+  const raw = first(value);
+  const num = Number(raw);
+  return Number.isFinite(num) ? num : null;
+}
+
+function joinLocation(locality, region, country) {
+  return [locality, region, country].filter(Boolean).join(", ");
+}
+
+function buildCandidateUrls(baseUrl) {
+  const raw = (baseUrl || "").trim();
+  if (!raw) return [];
+
+  const urls = [raw];
+
+  try {
+    const parsed = new URL(raw);
+    const pathWithoutSlash = parsed.pathname.replace(/\/$/, "");
+    const basePath = `${parsed.origin}${pathWithoutSlash}`;
+
+    const withFormat = new URL(parsed.toString());
+    withFormat.searchParams.set("format", "json");
+    urls.push(withFormat.toString());
+
+    const withOutput = new URL(parsed.toString());
+    withOutput.searchParams.set("output", "json");
+    urls.push(withOutput.toString());
+
+    if (pathWithoutSlash) {
+      urls.push(`${basePath}.json`);
+      urls.push(`${basePath}/checkins.json`);
+      urls.push(`${basePath}/feed.json`);
+      urls.push(`${basePath}/api/checkins`);
+    } else {
+      urls.push(`${parsed.origin}/checkins.json`);
+      urls.push(`${parsed.origin}/feed.json`);
+      urls.push(`${parsed.origin}/api/checkins`);
+    }
+  } catch {
+    // If URL parsing fails, we still try the raw URL above.
+  }
+
+  return [...new Set(urls)];
+}
+
+async function fetchJson(url) {
+  const headers = FEED_TOKEN ? { Authorization: `Bearer ${FEED_TOKEN}` } : {};
+  const fetchOptions = Object.keys(headers).length ? { headers } : undefined;
+
+  try {
+    return await EleventyFetch(url, {
+      duration: "15m",
+      type: "json",
+      fetchOptions,
+    });
+  } catch (jsonError) {
+    // Some endpoints serve JSON with an incorrect content type. Retry as text.
+    const text = await EleventyFetch(url, {
+      duration: "15m",
+      type: "text",
+      fetchOptions,
+    });
+    const trimmed = text.trim();
+    if (!trimmed.startsWith("{") && !trimmed.startsWith("[")) {
+      throw jsonError;
+    }
+    return JSON.parse(trimmed);
+  }
+}
+
+function looksLikeCheckinEntry(entry) {
+  if (!entry || typeof entry !== "object") return false;
+  const type = Array.isArray(entry.type) ? entry.type : [];
+  if (type.includes("h-entry")) {
+    const props = entry.properties || {};
+    return Boolean(props.checkin || props.location);
+  }
+  return false;
+}
+
+function extractEntries(payload) {
+  const queue = [];
+  if (Array.isArray(payload)) {
+    queue.push(...payload);
+  } else if (payload && typeof payload === "object") {
+    queue.push(payload);
+  }
+
+  const entries = [];
+
+  while (queue.length) {
+    const item = queue.shift();
+    if (!item || typeof item !== "object") continue;
+
+    if (looksLikeCheckinEntry(item)) {
+      entries.push(item);
+    }
+
+    if (Array.isArray(item.items)) queue.push(...item.items);
+    if (Array.isArray(item.children)) queue.push(...item.children);
+    if (item.data && Array.isArray(item.data.items)) queue.push(...item.data.items);
+  }
+
+  return entries;
+}
+
+function uniqueStrings(values) {
+  return [...new Set(values.filter(Boolean))];
+}
+
+function parsePersonCard(card) {
+  if (!card || typeof card !== "object") return null;
+  const props = card.properties || {};
+
+  const urls = Array.isArray(props.url)
+    ? props.url.map((url) => asText(url)).filter(Boolean)
+    : [];
+  const photos = Array.isArray(props.photo)
+    ? props.photo.map((photo) => asText(photo)).filter(Boolean)
+    : [];
+
+  return {
+    name: asText(first(props.name)),
+    url: urls[0] || "",
+    urls,
+    photo: photos[0] || "",
+  };
+}
+
+function parseCategory(categoryValues) {
+  const tags = [];
+  const people = [];
+
+  for (const value of categoryValues) {
+    if (typeof value === "string") {
+      tags.push(value.trim());
+      continue;
+    }
+
+    if (!value || typeof value !== "object") continue;
+    const type = Array.isArray(value.type) ? value.type : [];
+    if (type.includes("h-card")) {
+      const person = parsePersonCard(value);
+      if (person && (person.name || person.url)) {
+        people.push(person);
+      }
+    }
+  }
+
+  return {
+    tags: uniqueStrings(tags),
+    people,
+  };
+}
+
+function normalizeCheckin(entry) {
+  const props = entry.properties || {};
+
+  if (!props.checkin && !props.location) {
+    return null;
+  }
+
+  const checkinCard = first(props.checkin);
+  const locationCard = first(props.location);
+
+  const checkinProps =
+    checkinCard && typeof checkinCard === "object" && checkinCard.properties
+      ? checkinCard.properties
+      : {};
+  const locationProps =
+    locationCard && typeof locationCard === "object" && locationCard.properties
+      ? locationCard.properties
+      : {};
+
+  const venueUrlsRaw = Array.isArray(checkinProps.url)
+    ? checkinProps.url
+    : checkinProps.url
+      ? [checkinProps.url]
+      : [];
+  const venueUrls = venueUrlsRaw.map((url) => asText(url)).filter(Boolean);
+
+  const name = asText(first(checkinProps.name)) || "Unknown place";
+  const venueUrl = venueUrls[0] || asText(checkinCard?.value);
+  const venueWebsiteUrl = venueUrls[1] || "";
+  const venueSocialUrl = venueUrls[2] || "";
+
+  const locality = asText(first(checkinProps.locality)) || asText(first(locationProps.locality));
+  const region = asText(first(checkinProps.region)) || asText(first(locationProps.region));
+  const country =
+    asText(first(checkinProps["country-name"])) ||
+    asText(first(locationProps["country-name"]));
+  const postalCode =
+    asText(first(checkinProps["postal-code"])) ||
+    asText(first(locationProps["postal-code"]));
+
+  const latitude =
+    asNumber(checkinProps.latitude) ?? asNumber(locationProps.latitude) ?? asNumber(props.latitude);
+  const longitude =
+    asNumber(checkinProps.longitude) ?? asNumber(locationProps.longitude) ?? asNumber(props.longitude);
+
+  const published = asText(first(props.published));
+  const syndication = asText(first(props.syndication));
+  const visibility = asText(first(props.visibility)).toLowerCase();
+
+  const categoryValues = Array.isArray(props.category) ? props.category : [];
+  const category = parseCategory(categoryValues);
+
+  const checkedInByCard = first(props["checked-in-by"]);
+  const checkedInBy = parsePersonCard(checkedInByCard);
+
+  const photos = Array.isArray(props.photo)
+    ? props.photo.map((photo) => asText(photo)).filter(Boolean)
+    : [];
+
+  const mapUrl =
+    latitude !== null && longitude !== null
+      ? `https://www.openstreetmap.org/?mlat=${latitude}&mlon=${longitude}#map=16/${latitude}/${longitude}`
+      : "";
+
+  const coordinatesText =
+    latitude !== null && longitude !== null
+      ? `${latitude.toFixed(5)}, ${longitude.toFixed(5)}`
+      : "";
+
+  const locationText = joinLocation(locality, region, country);
+  const timestamp = published ? Date.parse(published) || 0 : 0;
+  const id = syndication || `${published}-${name}-${coordinatesText}`;
+
+  return {
+    id,
+    published,
+    timestamp,
+    syndication,
+    visibility,
+    isPrivate: visibility === "private",
+    name,
+    photos,
+    tags: category.tags,
+    taggedPeople: category.people,
+    checkedInBy,
+    venueUrl,
+    venueWebsiteUrl,
+    venueSocialUrl,
+    locality,
+    region,
+    country,
+    postalCode,
+    locationText,
+    latitude,
+    longitude,
+    coordinatesText,
+    mapUrl,
+  };
+}
+
+function normalizeCheckins(entries) {
+  const seen = new Set();
+  const checkins = [];
+
+  for (const entry of entries) {
+    const normalized = normalizeCheckin(entry);
+    if (!normalized) continue;
+    if (seen.has(normalized.id)) continue;
+    seen.add(normalized.id);
+    checkins.push(normalized);
+  }
+
+  return checkins.sort((a, b) => b.timestamp - a.timestamp);
+}
+
+export default async function () {
+  const checkedAt = new Date().toISOString();
+  const candidateUrls = buildCandidateUrls(FEED_URL);
+  const errors = [];
+
+  for (const url of candidateUrls) {
+    try {
+      console.log(`[whereCheckins] Fetching: ${url}`);
+      const payload = await fetchJson(url);
+      const entries = extractEntries(payload);
+      const checkins = normalizeCheckins(entries);
+
+      if (checkins.length > 0) {
+        const withCoordinates = checkins.filter(
+          (item) => item.latitude !== null && item.longitude !== null
+        ).length;
+
+        return {
+          feedUrl: url,
+          checkins,
+          source: "ownyourswarm",
+          available: true,
+          checkedAt,
+          triedUrls: candidateUrls,
+          errors,
+          stats: {
+            total: checkins.length,
+            withCoordinates,
+          },
+        };
+      }
+
+      errors.push(`No checkin h-entry objects found at ${url}`);
+    } catch (error) {
+      const message = `[whereCheckins] Unable to use ${url}: ${error.message}`;
+      console.log(message);
+      errors.push(message);
+    }
+  }
+
+  return {
+    feedUrl: FEED_URL,
+    checkins: [],
+    source: "unavailable",
+    available: false,
+    checkedAt,
+    triedUrls: candidateUrls,
+    errors,
+    stats: {
+      total: 0,
+      withCoordinates: 0,
+    },
+  };
+}
diff --git a/_includes/layouts/base.njk b/_includes/layouts/base.njk
index 053c598..8a53e50 100644
--- a/_includes/layouts/base.njk
+++ b/_includes/layouts/base.njk
@@ -187,6 +187,7 @@
               {% if blogrollStatus and blogrollStatus.source == "indiekit" %}<a href="/blogroll/" role="menuitem">Blogroll</a>{% endif %}
               {% if podrollStatus and podrollStatus.source == "indiekit" %}<a href="/podroll/" role="menuitem">Podroll</a>{% endif %}
               {% if newsActivity and newsActivity.source == "indiekit" %}<a href="/news/" role="menuitem">News</a>{% endif %}
+              <a href="/where/" role="menuitem">Where</a>
               <a href="/slashes/" role="menuitem">All Pages</a>
             </div>
           </div>
@@ -253,6 +254,7 @@
           {% if blogrollStatus and blogrollStatus.source == "indiekit" %}<a href="/blogroll/">Blogroll</a>{% endif %}
           {% if podrollStatus and podrollStatus.source == "indiekit" %}<a href="/podroll/">Podroll</a>{% endif %}
           {% if newsActivity and newsActivity.source == "indiekit" %}<a href="/news/">News</a>{% endif %}
+          <a href="/where/">Where</a>
           <a href="/slashes/">All Pages</a>
         </div>
       </div>
diff --git a/slashes.njk b/slashes.njk
index ff0d74e..387ce52 100644
--- a/slashes.njk
+++ b/slashes.njk
@@ -205,6 +205,14 @@ eleventyImport:
         </div>
         <p class="text-surface-600 dark:text-surface-400 mt-2">Social interactions (likes, reposts, replies)</p>
       </li>
+      <li class="h-entry post-card">
+        <div class="post-header">
+          <h3 class="text-xl font-semibold">
+            <a href="/where/" class="p-name u-url text-surface-900 dark:text-surface-100 hover:text-accent-600 dark:hover:text-accent-400">/where</a>
+          </h3>
+        </div>
+        <p class="text-surface-600 dark:text-surface-400 mt-2">Location check-ins from OwnYourSwarm</p>
+      </li>
       <li class="h-entry post-card">
         <div class="post-header">
           <h3 class="text-xl font-semibold">
diff --git a/theme/_data/whereCheckins.js b/theme/_data/whereCheckins.js
new file mode 100644
index 0000000..dcf17a1
--- /dev/null
+++ b/theme/_data/whereCheckins.js
@@ -0,0 +1,353 @@
+/**
+ * Where/Checkin data
+ *
+ * Fetches h-entry checkins from an OwnYourSwarm-connected endpoint.
+ * Expected payload: MF2 JSON with h-entry objects containing `checkin` and/or `location`.
+ */
+
+import EleventyFetch from "@11ty/eleventy-fetch";
+
+const FEED_URL = process.env.OWNYOURSWARM_FEED_URL || "https://ownyourswarm.p3k.io/";
+const FEED_TOKEN = process.env.OWNYOURSWARM_FEED_TOKEN || "";
+
+function first(value) {
+  if (Array.isArray(value)) return value[0];
+  return value;
+}
+
+function asText(value) {
+  if (value === null || value === undefined) return "";
+  if (typeof value === "string") return value;
+  if (typeof value === "number") return String(value);
+  if (typeof value === "object") {
+    if (typeof value.value === "string") return value.value;
+    if (typeof value.text === "string") return value.text;
+  }
+  return "";
+}
+
+function asNumber(value) {
+  const raw = first(value);
+  const num = Number(raw);
+  return Number.isFinite(num) ? num : null;
+}
+
+function joinLocation(locality, region, country) {
+  return [locality, region, country].filter(Boolean).join(", ");
+}
+
+function buildCandidateUrls(baseUrl) {
+  const raw = (baseUrl || "").trim();
+  if (!raw) return [];
+
+  const urls = [raw];
+
+  try {
+    const parsed = new URL(raw);
+    const pathWithoutSlash = parsed.pathname.replace(/\/$/, "");
+    const basePath = `${parsed.origin}${pathWithoutSlash}`;
+
+    const withFormat = new URL(parsed.toString());
+    withFormat.searchParams.set("format", "json");
+    urls.push(withFormat.toString());
+
+    const withOutput = new URL(parsed.toString());
+    withOutput.searchParams.set("output", "json");
+    urls.push(withOutput.toString());
+
+    if (pathWithoutSlash) {
+      urls.push(`${basePath}.json`);
+      urls.push(`${basePath}/checkins.json`);
+      urls.push(`${basePath}/feed.json`);
+      urls.push(`${basePath}/api/checkins`);
+    } else {
+      urls.push(`${parsed.origin}/checkins.json`);
+      urls.push(`${parsed.origin}/feed.json`);
+      urls.push(`${parsed.origin}/api/checkins`);
+    }
+  } catch {
+    // If URL parsing fails, we still try the raw URL above.
+  }
+
+  return [...new Set(urls)];
+}
+
+async function fetchJson(url) {
+  const headers = FEED_TOKEN ? { Authorization: `Bearer ${FEED_TOKEN}` } : {};
+  const fetchOptions = Object.keys(headers).length ? { headers } : undefined;
+
+  try {
+    return await EleventyFetch(url, {
+      duration: "15m",
+      type: "json",
+      fetchOptions,
+    });
+  } catch (jsonError) {
+    // Some endpoints serve JSON with an incorrect content type. Retry as text.
+    const text = await EleventyFetch(url, {
+      duration: "15m",
+      type: "text",
+      fetchOptions,
+    });
+    const trimmed = text.trim();
+    if (!trimmed.startsWith("{") && !trimmed.startsWith("[")) {
+      throw jsonError;
+    }
+    return JSON.parse(trimmed);
+  }
+}
+
+function looksLikeCheckinEntry(entry) {
+  if (!entry || typeof entry !== "object") return false;
+  const type = Array.isArray(entry.type) ? entry.type : [];
+  if (type.includes("h-entry")) {
+    const props = entry.properties || {};
+    return Boolean(props.checkin || props.location);
+  }
+  return false;
+}
+
+function extractEntries(payload) {
+  const queue = [];
+  if (Array.isArray(payload)) {
+    queue.push(...payload);
+  } else if (payload && typeof payload === "object") {
+    queue.push(payload);
+  }
+
+  const entries = [];
+
+  while (queue.length) {
+    const item = queue.shift();
+    if (!item || typeof item !== "object") continue;
+
+    if (looksLikeCheckinEntry(item)) {
+      entries.push(item);
+    }
+
+    if (Array.isArray(item.items)) queue.push(...item.items);
+    if (Array.isArray(item.children)) queue.push(...item.children);
+    if (item.data && Array.isArray(item.data.items)) queue.push(...item.data.items);
+  }
+
+  return entries;
+}
+
+function uniqueStrings(values) {
+  return [...new Set(values.filter(Boolean))];
+}
+
+function parsePersonCard(card) {
+  if (!card || typeof card !== "object") return null;
+  const props = card.properties || {};
+
+  const urls = Array.isArray(props.url)
+    ? props.url.map((url) => asText(url)).filter(Boolean)
+    : [];
+  const photos = Array.isArray(props.photo)
+    ? props.photo.map((photo) => asText(photo)).filter(Boolean)
+    : [];
+
+  return {
+    name: asText(first(props.name)),
+    url: urls[0] || "",
+    urls,
+    photo: photos[0] || "",
+  };
+}
+
+function parseCategory(categoryValues) {
+  const tags = [];
+  const people = [];
+
+  for (const value of categoryValues) {
+    if (typeof value === "string") {
+      tags.push(value.trim());
+      continue;
+    }
+
+    if (!value || typeof value !== "object") continue;
+    const type = Array.isArray(value.type) ? value.type : [];
+    if (type.includes("h-card")) {
+      const person = parsePersonCard(value);
+      if (person && (person.name || person.url)) {
+        people.push(person);
+      }
+    }
+  }
+
+  return {
+    tags: uniqueStrings(tags),
+    people,
+  };
+}
+
+function normalizeCheckin(entry) {
+  const props = entry.properties || {};
+
+  if (!props.checkin && !props.location) {
+    return null;
+  }
+
+  const checkinCard = first(props.checkin);
+  const locationCard = first(props.location);
+
+  const checkinProps =
+    checkinCard && typeof checkinCard === "object" && checkinCard.properties
+      ? checkinCard.properties
+      : {};
+  const locationProps =
+    locationCard && typeof locationCard === "object" && locationCard.properties
+      ? locationCard.properties
+      : {};
+
+  const venueUrlsRaw = Array.isArray(checkinProps.url)
+    ? checkinProps.url
+    : checkinProps.url
+      ? [checkinProps.url]
+      : [];
+  const venueUrls = venueUrlsRaw.map((url) => asText(url)).filter(Boolean);
+
+  const name = asText(first(checkinProps.name)) || "Unknown place";
+  const venueUrl = venueUrls[0] || asText(checkinCard?.value);
+  const venueWebsiteUrl = venueUrls[1] || "";
+  const venueSocialUrl = venueUrls[2] || "";
+
+  const locality = asText(first(checkinProps.locality)) || asText(first(locationProps.locality));
+  const region = asText(first(checkinProps.region)) || asText(first(locationProps.region));
+  const country =
+    asText(first(checkinProps["country-name"])) ||
+    asText(first(locationProps["country-name"]));
+  const postalCode =
+    asText(first(checkinProps["postal-code"])) ||
+    asText(first(locationProps["postal-code"]));
+
+  const latitude =
+    asNumber(checkinProps.latitude) ?? asNumber(locationProps.latitude) ?? asNumber(props.latitude);
+  const longitude =
+    asNumber(checkinProps.longitude) ?? asNumber(locationProps.longitude) ?? asNumber(props.longitude);
+
+  const published = asText(first(props.published));
+  const syndication = asText(first(props.syndication));
+  const visibility = asText(first(props.visibility)).toLowerCase();
+
+  const categoryValues = Array.isArray(props.category) ? props.category : [];
+  const category = parseCategory(categoryValues);
+
+  const checkedInByCard = first(props["checked-in-by"]);
+  const checkedInBy = parsePersonCard(checkedInByCard);
+
+  const photos = Array.isArray(props.photo)
+    ? props.photo.map((photo) => asText(photo)).filter(Boolean)
+    : [];
+
+  const mapUrl =
+    latitude !== null && longitude !== null
+      ? `https://www.openstreetmap.org/?mlat=${latitude}&mlon=${longitude}#map=16/${latitude}/${longitude}`
+      : "";
+
+  const coordinatesText =
+    latitude !== null && longitude !== null
+      ? `${latitude.toFixed(5)}, ${longitude.toFixed(5)}`
+      : "";
+
+  const locationText = joinLocation(locality, region, country);
+  const timestamp = published ? Date.parse(published) || 0 : 0;
+  const id = syndication || `${published}-${name}-${coordinatesText}`;
+
+  return {
+    id,
+    published,
+    timestamp,
+    syndication,
+    visibility,
+    isPrivate: visibility === "private",
+    name,
+    photos,
+    tags: category.tags,
+    taggedPeople: category.people,
+    checkedInBy,
+    venueUrl,
+    venueWebsiteUrl,
+    venueSocialUrl,
+    locality,
+    region,
+    country,
+    postalCode,
+    locationText,
+    latitude,
+    longitude,
+    coordinatesText,
+    mapUrl,
+  };
+}
+
+function normalizeCheckins(entries) {
+  const seen = new Set();
+  const checkins = [];
+
+  for (const entry of entries) {
+    const normalized = normalizeCheckin(entry);
+    if (!normalized) continue;
+    if (seen.has(normalized.id)) continue;
+    seen.add(normalized.id);
+    checkins.push(normalized);
+  }
+
+  return checkins.sort((a, b) => b.timestamp - a.timestamp);
+}
+
+export default async function () {
+  const checkedAt = new Date().toISOString();
+  const candidateUrls = buildCandidateUrls(FEED_URL);
+  const errors = [];
+
+  for (const url of candidateUrls) {
+    try {
+      console.log(`[whereCheckins] Fetching: ${url}`);
+      const payload = await fetchJson(url);
+      const entries = extractEntries(payload);
+      const checkins = normalizeCheckins(entries);
+
+      if (checkins.length > 0) {
+        const withCoordinates = checkins.filter(
+          (item) => item.latitude !== null && item.longitude !== null
+        ).length;
+
+        return {
+          feedUrl: url,
+          checkins,
+          source: "ownyourswarm",
+          available: true,
+          checkedAt,
+          triedUrls: candidateUrls,
+          errors,
+          stats: {
+            total: checkins.length,
+            withCoordinates,
+          },
+        };
+      }
+
+      errors.push(`No checkin h-entry objects found at ${url}`);
+    } catch (error) {
+      const message = `[whereCheckins] Unable to use ${url}: ${error.message}`;
+      console.log(message);
+      errors.push(message);
+    }
+  }
+
+  return {
+    feedUrl: FEED_URL,
+    checkins: [],
+    source: "unavailable",
+    available: false,
+    checkedAt,
+    triedUrls: candidateUrls,
+    errors,
+    stats: {
+      total: 0,
+      withCoordinates: 0,
+    },
+  };
+}
diff --git a/theme/_includes/layouts/base.njk b/theme/_includes/layouts/base.njk
index cf5c196..a6a4401 100644
--- a/theme/_includes/layouts/base.njk
+++ b/theme/_includes/layouts/base.njk
@@ -166,6 +166,7 @@
             <div class="nav-dropdown-menu" x-show="open" x-transition x-cloak>
               <a href="/slashes/">All Pages</a>
               <a href="/cv/">/cv</a>
+              <a href="/where/">/where</a>
               {% for item in collections.pages %}
               <a href="{{ item.url }}">/{{ item.fileSlug }}</a>
               {% endfor %}
@@ -252,6 +253,7 @@
         <div class="mobile-nav-submenu" x-show="slashOpen" x-collapse>
           <a href="/slashes/">All Pages</a>
           <a href="/cv/">/cv</a>
+          <a href="/where/">/where</a>
           {% for item in collections.pages %}
           <a href="{{ item.url }}">/{{ item.fileSlug }}</a>
           {% endfor %}
diff --git a/theme/slashes.njk b/theme/slashes.njk
index 8c2a14c..8ef470a 100644
--- a/theme/slashes.njk
+++ b/theme/slashes.njk
@@ -63,7 +63,8 @@ eleventyImport:
         (newsActivity and newsActivity.source == "indiekit") or
         (youtubeChannel and youtubeChannel.source == "indiekit") or
         (blogrollStatus and blogrollStatus.source == "indiekit") or
-        (podrollStatus and podrollStatus.source == "indiekit") %}
+      (podrollStatus and podrollStatus.source == "indiekit") or
+      (whereCheckins and whereCheckins.source != "error") %}
   {% if hasActivityPages %}
   <div class="mb-8">
     <h2 class="text-lg font-semibold text-surface-800 dark:text-surface-200 mb-4">Activity Feeds</h2>
@@ -138,6 +139,14 @@ eleventyImport:
         <p class="text-surface-600 dark:text-surface-400 mt-2">YouTube channel</p>
       </li>
       {% endif %}
+      <li class="post-card">
+        <div class="post-header">
+          <h3 class="text-xl font-semibold">
+            <a href="/where/" class="text-surface-900 dark:text-surface-100 hover:text-accent-600 dark:hover:text-accent-400">/where</a>
+          </h3>
+        </div>
+        <p class="text-surface-600 dark:text-surface-400 mt-2">Location check-ins from OwnYourSwarm</p>
+      </li>
     </ul>
   </div>
   {% endif %}
diff --git a/theme/where.njk b/theme/where.njk
new file mode 100644
index 0000000..1bf9c6d
--- /dev/null
+++ b/theme/where.njk
@@ -0,0 +1,131 @@
+---
+layout: layouts/base.njk
+title: Where
+permalink: /where/
+withSidebar: true
+---
+{% set checkins = whereCheckins.checkins or [] %}
+
+<div class="where-page">
+  <header class="mb-6 sm:mb-8">
+    <h1 class="text-2xl sm:text-3xl md:text-4xl font-bold text-surface-900 dark:text-surface-100 mb-2">Where</h1>
+    <p class="text-surface-600 dark:text-surface-400">
+      Recent check-ins from Swarm via OwnYourSwarm, rendered from check-in metadata.
+    </p>
+    {% if whereCheckins.available %}
+    <p class="text-xs text-surface-600 dark:text-surface-400 mt-2">
+      Loaded {{ whereCheckins.stats.total }} check-ins{% if whereCheckins.stats.withCoordinates %} ({{ whereCheckins.stats.withCoordinates }} with coordinates){% endif %}.
+    </p>
+    {% endif %}
+  </header>
+
+  {% if checkins.length %}
+  <section class="space-y-4" aria-label="Recent check-ins">
+    {% for checkin in checkins %}
+    <article class="p-4 sm:p-5 bg-surface-50 dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700 shadow-sm">
+      <div class="flex items-start gap-3 sm:gap-4">
+        <div class="w-10 h-10 rounded-full bg-emerald-100 dark:bg-emerald-900/40 flex items-center justify-center flex-shrink-0 mt-0.5">
+          <svg class="w-5 h-5 text-emerald-700 dark:text-emerald-400" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17.657 16.657L13.414 20.9a2 2 0 01-2.828 0l-4.243-4.243a8 8 0 1111.314 0z"/>
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 11a3 3 0 11-6 0 3 3 0 016 0z"/>
+          </svg>
+        </div>
+
+        <div class="flex-1 min-w-0">
+          <h2 class="text-lg sm:text-xl font-semibold text-surface-900 dark:text-surface-100">
+            {% if checkin.venueUrl %}
+            <a href="{{ checkin.venueUrl }}" class="hover:text-emerald-600 dark:hover:text-emerald-400" target="_blank" rel="noopener">{{ checkin.name }}</a>
+            {% else %}
+            {{ checkin.name }}
+            {% endif %}
+          </h2>
+
+          {% if checkin.locationText or checkin.postalCode %}
+          <p class="text-sm text-surface-600 dark:text-surface-400 mt-1">
+            {{ checkin.locationText }}{% if checkin.locationText and checkin.postalCode %}, {% endif %}{{ checkin.postalCode }}
+          </p>
+          {% endif %}
+
+          <div class="text-xs text-surface-600 dark:text-surface-400 mt-2 flex flex-wrap items-center gap-2">
+            {% if checkin.published %}
+            <time class="font-mono" datetime="{{ checkin.published }}">{{ checkin.published | date("MMM d, yyyy") }}</time>
+            {% endif %}
+            {% if checkin.coordinatesText %}
+            <span class="px-2 py-0.5 rounded-full bg-surface-100 dark:bg-surface-700">{{ checkin.coordinatesText }}</span>
+            {% endif %}
+            {% if checkin.isPrivate %}
+            <span class="px-2 py-0.5 rounded-full bg-amber-100 dark:bg-amber-900/40 text-amber-800 dark:text-amber-300">Private</span>
+            {% endif %}
+            {% if checkin.checkedInBy and (checkin.checkedInBy.name or checkin.checkedInBy.url) %}
+            <span class="px-2 py-0.5 rounded-full bg-surface-100 dark:bg-surface-700">
+              Checked in by {% if checkin.checkedInBy.url %}<a href="{{ checkin.checkedInBy.url }}" class="hover:text-emerald-600 dark:hover:text-emerald-400" target="_blank" rel="noopener">{{ checkin.checkedInBy.name or checkin.checkedInBy.url }}</a>{% else %}{{ checkin.checkedInBy.name }}{% endif %}
+            </span>
+            {% endif %}
+          </div>
+
+          {% if checkin.tags and checkin.tags.length %}
+          <div class="mt-3 flex flex-wrap gap-2 text-xs">
+            {% for tag in checkin.tags | head(8) %}
+            <span class="inline-flex items-center px-2.5 py-1 rounded-full bg-indigo-100 dark:bg-indigo-900/30 text-indigo-800 dark:text-indigo-300">#{{ tag }}</span>
+            {% endfor %}
+          </div>
+          {% endif %}
+
+          {% if checkin.taggedPeople and checkin.taggedPeople.length %}
+          <div class="mt-2 flex flex-wrap gap-2 text-xs">
+            {% for person in checkin.taggedPeople | head(6) %}
+            {% if person.url %}
+            <a href="{{ person.url }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">{{ person.name or person.url }}</a>
+            {% else %}
+            <span class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300">{{ person.name }}</span>
+            {% endif %}
+            {% endfor %}
+          </div>
+          {% endif %}
+
+          <div class="mt-3 flex flex-wrap gap-2 text-xs">
+            {% if checkin.syndication %}
+            <a href="{{ checkin.syndication }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Swarm</a>
+            {% endif %}
+            {% if checkin.mapUrl %}
+            <a href="{{ checkin.mapUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-emerald-100/70 dark:bg-emerald-900/30 text-emerald-800 dark:text-emerald-300 hover:bg-emerald-200/70 dark:hover:bg-emerald-900/50" target="_blank" rel="noopener">Map</a>
+            {% endif %}
+            {% if checkin.venueWebsiteUrl %}
+            <a href="{{ checkin.venueWebsiteUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Website</a>
+            {% endif %}
+            {% if checkin.venueSocialUrl %}
+            <a href="{{ checkin.venueSocialUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Social</a>
+            {% endif %}
+          </div>
+
+          {% if checkin.photos and checkin.photos.length %}
+          <div class="mt-3 flex flex-wrap gap-2">
+            {% for photo in checkin.photos | head(3) %}
+            <a href="{{ photo }}" target="_blank" rel="noopener" class="block">
+              <img src="{{ photo }}" alt="Check-in photo" class="w-16 h-16 sm:w-20 sm:h-20 rounded-lg object-cover border border-surface-200 dark:border-surface-700" loading="lazy" eleventy:ignore>
+            </a>
+            {% endfor %}
+          </div>
+          {% endif %}
+        </div>
+      </div>
+    </article>
+    {% endfor %}
+  </section>
+  {% else %}
+  <section class="p-4 sm:p-5 bg-surface-50 dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700 shadow-sm" aria-live="polite">
+    <h2 class="text-lg font-semibold text-surface-900 dark:text-surface-100 mb-2">No check-ins available yet</h2>
+    <p class="text-sm text-surface-600 dark:text-surface-400 mb-2">
+      This page expects an endpoint that returns MF2 JSON h-entry checkins with properties like <code>published</code>, <code>checkin</code>, <code>location</code>, <code>category</code>, and <code>checked-in-by</code>.
+    </p>
+    {% if whereCheckins.feedUrl %}
+    <p class="text-sm text-surface-600 dark:text-surface-400 mb-2">
+      Current feed URL: <code>{{ whereCheckins.feedUrl }}</code>
+    </p>
+    {% endif %}
+    <p class="text-sm text-surface-600 dark:text-surface-400">
+      Configure <code>OWNYOURSWARM_FEED_URL</code> (and optionally <code>OWNYOURSWARM_FEED_TOKEN</code>) in your environment or deploy secrets.
+    </p>
+  </section>
+  {% endif %}
+</div>
diff --git a/where.njk b/where.njk
new file mode 100644
index 0000000..1bf9c6d
--- /dev/null
+++ b/where.njk
@@ -0,0 +1,131 @@
+---
+layout: layouts/base.njk
+title: Where
+permalink: /where/
+withSidebar: true
+---
+{% set checkins = whereCheckins.checkins or [] %}
+
+<div class="where-page">
+  <header class="mb-6 sm:mb-8">
+    <h1 class="text-2xl sm:text-3xl md:text-4xl font-bold text-surface-900 dark:text-surface-100 mb-2">Where</h1>
+    <p class="text-surface-600 dark:text-surface-400">
+      Recent check-ins from Swarm via OwnYourSwarm, rendered from check-in metadata.
+    </p>
+    {% if whereCheckins.available %}
+    <p class="text-xs text-surface-600 dark:text-surface-400 mt-2">
+      Loaded {{ whereCheckins.stats.total }} check-ins{% if whereCheckins.stats.withCoordinates %} ({{ whereCheckins.stats.withCoordinates }} with coordinates){% endif %}.
+    </p>
+    {% endif %}
+  </header>
+
+  {% if checkins.length %}
+  <section class="space-y-4" aria-label="Recent check-ins">
+    {% for checkin in checkins %}
+    <article class="p-4 sm:p-5 bg-surface-50 dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700 shadow-sm">
+      <div class="flex items-start gap-3 sm:gap-4">
+        <div class="w-10 h-10 rounded-full bg-emerald-100 dark:bg-emerald-900/40 flex items-center justify-center flex-shrink-0 mt-0.5">
+          <svg class="w-5 h-5 text-emerald-700 dark:text-emerald-400" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17.657 16.657L13.414 20.9a2 2 0 01-2.828 0l-4.243-4.243a8 8 0 1111.314 0z"/>
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 11a3 3 0 11-6 0 3 3 0 016 0z"/>
+          </svg>
+        </div>
+
+        <div class="flex-1 min-w-0">
+          <h2 class="text-lg sm:text-xl font-semibold text-surface-900 dark:text-surface-100">
+            {% if checkin.venueUrl %}
+            <a href="{{ checkin.venueUrl }}" class="hover:text-emerald-600 dark:hover:text-emerald-400" target="_blank" rel="noopener">{{ checkin.name }}</a>
+            {% else %}
+            {{ checkin.name }}
+            {% endif %}
+          </h2>
+
+          {% if checkin.locationText or checkin.postalCode %}
+          <p class="text-sm text-surface-600 dark:text-surface-400 mt-1">
+            {{ checkin.locationText }}{% if checkin.locationText and checkin.postalCode %}, {% endif %}{{ checkin.postalCode }}
+          </p>
+          {% endif %}
+
+          <div class="text-xs text-surface-600 dark:text-surface-400 mt-2 flex flex-wrap items-center gap-2">
+            {% if checkin.published %}
+            <time class="font-mono" datetime="{{ checkin.published }}">{{ checkin.published | date("MMM d, yyyy") }}</time>
+            {% endif %}
+            {% if checkin.coordinatesText %}
+            <span class="px-2 py-0.5 rounded-full bg-surface-100 dark:bg-surface-700">{{ checkin.coordinatesText }}</span>
+            {% endif %}
+            {% if checkin.isPrivate %}
+            <span class="px-2 py-0.5 rounded-full bg-amber-100 dark:bg-amber-900/40 text-amber-800 dark:text-amber-300">Private</span>
+            {% endif %}
+            {% if checkin.checkedInBy and (checkin.checkedInBy.name or checkin.checkedInBy.url) %}
+            <span class="px-2 py-0.5 rounded-full bg-surface-100 dark:bg-surface-700">
+              Checked in by {% if checkin.checkedInBy.url %}<a href="{{ checkin.checkedInBy.url }}" class="hover:text-emerald-600 dark:hover:text-emerald-400" target="_blank" rel="noopener">{{ checkin.checkedInBy.name or checkin.checkedInBy.url }}</a>{% else %}{{ checkin.checkedInBy.name }}{% endif %}
+            </span>
+            {% endif %}
+          </div>
+
+          {% if checkin.tags and checkin.tags.length %}
+          <div class="mt-3 flex flex-wrap gap-2 text-xs">
+            {% for tag in checkin.tags | head(8) %}
+            <span class="inline-flex items-center px-2.5 py-1 rounded-full bg-indigo-100 dark:bg-indigo-900/30 text-indigo-800 dark:text-indigo-300">#{{ tag }}</span>
+            {% endfor %}
+          </div>
+          {% endif %}
+
+          {% if checkin.taggedPeople and checkin.taggedPeople.length %}
+          <div class="mt-2 flex flex-wrap gap-2 text-xs">
+            {% for person in checkin.taggedPeople | head(6) %}
+            {% if person.url %}
+            <a href="{{ person.url }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">{{ person.name or person.url }}</a>
+            {% else %}
+            <span class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300">{{ person.name }}</span>
+            {% endif %}
+            {% endfor %}
+          </div>
+          {% endif %}
+
+          <div class="mt-3 flex flex-wrap gap-2 text-xs">
+            {% if checkin.syndication %}
+            <a href="{{ checkin.syndication }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Swarm</a>
+            {% endif %}
+            {% if checkin.mapUrl %}
+            <a href="{{ checkin.mapUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-emerald-100/70 dark:bg-emerald-900/30 text-emerald-800 dark:text-emerald-300 hover:bg-emerald-200/70 dark:hover:bg-emerald-900/50" target="_blank" rel="noopener">Map</a>
+            {% endif %}
+            {% if checkin.venueWebsiteUrl %}
+            <a href="{{ checkin.venueWebsiteUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Website</a>
+            {% endif %}
+            {% if checkin.venueSocialUrl %}
+            <a href="{{ checkin.venueSocialUrl }}" class="inline-flex items-center px-2.5 py-1 rounded-full bg-surface-100 dark:bg-surface-700 text-surface-700 dark:text-surface-300 hover:bg-surface-200 dark:hover:bg-surface-600" target="_blank" rel="noopener">Social</a>
+            {% endif %}
+          </div>
+
+          {% if checkin.photos and checkin.photos.length %}
+          <div class="mt-3 flex flex-wrap gap-2">
+            {% for photo in checkin.photos | head(3) %}
+            <a href="{{ photo }}" target="_blank" rel="noopener" class="block">
+              <img src="{{ photo }}" alt="Check-in photo" class="w-16 h-16 sm:w-20 sm:h-20 rounded-lg object-cover border border-surface-200 dark:border-surface-700" loading="lazy" eleventy:ignore>
+            </a>
+            {% endfor %}
+          </div>
+          {% endif %}
+        </div>
+      </div>
+    </article>
+    {% endfor %}
+  </section>
+  {% else %}
+  <section class="p-4 sm:p-5 bg-surface-50 dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700 shadow-sm" aria-live="polite">
+    <h2 class="text-lg font-semibold text-surface-900 dark:text-surface-100 mb-2">No check-ins available yet</h2>
+    <p class="text-sm text-surface-600 dark:text-surface-400 mb-2">
+      This page expects an endpoint that returns MF2 JSON h-entry checkins with properties like <code>published</code>, <code>checkin</code>, <code>location</code>, <code>category</code>, and <code>checked-in-by</code>.
+    </p>
+    {% if whereCheckins.feedUrl %}
+    <p class="text-sm text-surface-600 dark:text-surface-400 mb-2">
+      Current feed URL: <code>{{ whereCheckins.feedUrl }}</code>
+    </p>
+    {% endif %}
+    <p class="text-sm text-surface-600 dark:text-surface-400">
+      Configure <code>OWNYOURSWARM_FEED_URL</code> (and optionally <code>OWNYOURSWARM_FEED_TOKEN</code>) in your environment or deploy secrets.
+    </p>
+  </section>
+  {% endif %}
+</div>