add hashtag indexing

lib/mix/tasks/pleroma/search.ex

@@ -9,6 +9,7 @@ defmodule Mix.Tasks.Pleroma.Search do
   alias Pleroma.Activity
   alias Pleroma.Pagination
   alias Pleroma.User
+  alias Pleroma.Hashtag
 
   @shortdoc "Manages elasticsearch"
 
@@ -29,8 +30,16 @@ def run(["import", "users" | _rest]) do
     |> get_all(:users)
   end
 
+  def run(["import", "hashtags" | _rest]) do
+    start_pleroma()
+
+    from(h in Hashtag)
+    |> Pleroma.Repo.all()
+    |> Pleroma.Elasticsearch.bulk_post(:hashtags)
+  end
+
   defp get_all(query, index, max_id \\ nil) do
-    params = %{limit: 2000}
+    params = %{limit: 1000}
 
     params =
       if max_id == nil do

lib/pleroma/elasticsearch/document_mappings/hashtag.ex

@@ -0,0 +1,10 @@
+defmodule Pleroma.Elasticsearch.DocumentMappings.Hashtag do
+  def id(obj), do: obj.id
+
+  def encode(hashtag) do
+    %{
+      hashtag: hashtag.name,
+      timestamp: hashtag.inserted_at
+    }
+  end
+end

lib/pleroma/elasticsearch/store.ex

@@ -85,6 +85,25 @@ def bulk_post(data, :users) do
     )
   end
 
+  def bulk_post(data, :hashtags) do
+    d =
+      data
+      |> Enum.map(fn d ->
+        [
+          %{index: %{_id: DocumentMappings.Hashtag.id(d)}},
+          DocumentMappings.Hashtag.encode(d)
+        ]
+      end)
+      |> List.flatten()
+
+    Elastix.Bulk.post(
+      url(),
+      d,
+      index: "hashtags",
+      type: "hashtag"
+    )
+  end
+
   def search_activities(q) do
     Elastix.Search.search(
       url(),

priv/es-mappings/hashtag.json

@@ -1,5 +1,9 @@
 {
   "properties": {
+    "timestamp": {
+      "type": "date",
+      "index": true
+    },
     "hashtag": {
       "type": "text"
     }