Use ssb-backlinks for channels/hashtags if it is available

2 files changed, 32 insertions, 14 deletions

diff --git a/lib/app.js b/lib/app.js
index d1f76f3..6e182bf 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -471,3 +471,33 @@ App.prototype.streamEmojis = function () {
     pull.unique('link')
   )
 }
+
+App.prototype.streamChannel = function (opts) {
+  if (this.sbot.backlinks) return this.sbot.backlinks.read(u.mergeOpts(opts, {
+    query: [{$filter: {
+      dest: '#' + opts.channel,
+      value: {
+        content: {
+          type: 'post'
+        }
+      },
+      timestamp: {
+        $gt: opts.gt,
+        $lt: opts.lt,
+      }
+    }}]
+  }))
+
+  if (this.sbot.query) return this.sbot.query.read(u.mergeOpts(opts, {
+    query: [{$filter: {
+      value: {content: {channel: opts.channel}},
+      timestamp: {
+        $gt: opts.gt,
+        $lt: opts.lt,
+      }
+    }}]
+  }))
+
+  return pull.error(new Error(
+    'Viewing channels/tags requires the ssb-backlinks or ssb-query plugin'))
+}
diff --git a/lib/serve.js b/lib/serve.js
index 354e75f..2d088ae 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -890,23 +890,11 @@ Serve.prototype.channel = function (path) {
     lt: lt,
     gt: gt,
     limit: Number(q.limit) || 12,
-    query: [{$filter: {
-      value: {content: {channel: channel}},
-      timestamp: {
-        $gt: gt,
-        $lt: lt,
-      }
-    }}]
+    channel: channel,
   }
 
-  if (!this.app.sbot.query) return pull(
-    pull.once(u.renderError(new Error('Missing ssb-query plugin')).outerHTML),
-    this.wrapPage('#' + channel),
-    this.respondSink(400, {'Content-Type': ctype('html')})
-  )
-
   pull(
-    this.app.sbot.query.read(opts),
+    this.app.streamChannel(opts),
     this.renderThreadPaginated(opts, null, q),
     this.wrapMessages(),
     this.wrapChannel(channel),