Add search engine support for files (#16190)

* Add search engine support for files

* Fixing i18n

* Fix golangci-lint

* Fix consistency problem in the Search receiver functio of the SqlFileStore

* Fixing some tests

* Fixing test

* Apply suggestions from code review

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Addressing PR review comments

* Removing some empty lines

* Address PR review comments

* Fixing problem after merge master

* Fixing spelling problem

* Add missed translations

* Fixing certain global variable usages after merge master

* Fixing some constants usage

* Fixing goimports order

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

i18n/en.json

@@ -5822,6 +5822,10 @@
     "id": "bleveengine.create_channel_index.error",
     "translation": "Error creating the bleve channel index."
   },
+  {
+    "id": "bleveengine.create_file_index.error",
+    "translation": "Error creating the bleve file index."
+  },
   {
     "id": "bleveengine.create_post_index.error",
     "translation": "Error creating the bleve post index."
@@ -5838,14 +5842,30 @@
     "id": "bleveengine.delete_channel_posts.error",
     "translation": "Failed to delete channel posts"
   },
+  {
+    "id": "bleveengine.delete_file.error",
+    "translation": "Failed to delete the file."
+  },
+  {
+    "id": "bleveengine.delete_files_batch.error",
+    "translation": "Failed to delete the files."
+  },
   {
     "id": "bleveengine.delete_post.error",
     "translation": "Failed to delete the post."
   },
+  {
+    "id": "bleveengine.delete_post_files.error",
+    "translation": "Fiiled to delete the post files."
+  },
   {
     "id": "bleveengine.delete_user.error",
     "translation": "Failed to delete the user."
   },
+  {
+    "id": "bleveengine.delete_user_files.error",
+    "translation": "Failed to delete the user files."
+  },
   {
     "id": "bleveengine.delete_user_posts.error",
     "translation": "Failed to delete user posts"
@@ -5854,6 +5874,10 @@
     "id": "bleveengine.index_channel.error",
     "translation": "Failed to index the channel."
   },
+  {
+    "id": "bleveengine.index_file.error",
+    "translation": "Failed to index the file."
+  },
   {
     "id": "bleveengine.index_post.error",
     "translation": "Failed to index the post."
@@ -5866,6 +5890,10 @@
     "id": "bleveengine.indexer.do_job.bulk_index_channels.batch_error",
     "translation": "Failed to index channel batch."
   },
+  {
+    "id": "bleveengine.indexer.do_job.bulk_index_files.batch_error",
+    "translation": "Failed to index file batch."
+  },
   {
     "id": "bleveengine.indexer.do_job.bulk_index_posts.batch_error",
     "translation": "Failed to index post batch."
@@ -5910,6 +5938,10 @@
     "id": "bleveengine.search_channels.error",
     "translation": "Channel search failed to complete."
   },
+  {
+    "id": "bleveengine.search_files.error",
+    "translation": "File search failed to complete."
+  },
   {
     "id": "bleveengine.search_posts.error",
     "translation": "Post search failed to complete."
@@ -5930,6 +5962,10 @@
     "id": "bleveengine.stop_channel_index.error",
     "translation": "Failed to close channel index."
   },
+  {
+    "id": "bleveengine.stop_file_index.error",
+    "translation": "Failed to close file index."
+  },
   {
     "id": "bleveengine.stop_post_index.error",
     "translation": "Failed to close post index."
@@ -6150,6 +6186,10 @@
     "id": "ent.elasticsearch.create_template_channels_if_not_exists.template_create_failed",
     "translation": "Failed to create Elasticsearch template for channels"
   },
+  {
+    "id": "ent.elasticsearch.create_template_file_info_if_not_exists.template_create_failed",
+    "translation": "Failed to create Elasticsearch template for files"
+  },
   {
     "id": "ent.elasticsearch.create_template_posts_if_not_exists.template_create_failed",
     "translation": "Failed to create Elasticsearch template for posts"
@@ -6174,14 +6214,26 @@
     "id": "ent.elasticsearch.delete_channel_posts.error",
     "translation": "Failed to delete channel posts"
   },
+  {
+    "id": "ent.elasticsearch.delete_file.error",
+    "translation": "Failed to delete file"
+  },
   {
     "id": "ent.elasticsearch.delete_post.error",
     "translation": "Failed to delete the post"
   },
+  {
+    "id": "ent.elasticsearch.delete_post_files.error",
+    "translation": "Failed to delete post files"
+  },
   {
     "id": "ent.elasticsearch.delete_user.error",
     "translation": "Failed to delete the user"
   },
+  {
+    "id": "ent.elasticsearch.delete_user_files.error",
+    "translation": "Failed to delete user files"
+  },
   {
     "id": "ent.elasticsearch.delete_user_posts.error",
     "translation": "Failed to delete user posts"
@@ -6198,6 +6250,10 @@
     "id": "ent.elasticsearch.index_channels_batch.error",
     "translation": "Unable to get the channels batch for indexing."
   },
+  {
+    "id": "ent.elasticsearch.index_file.error",
+    "translation": "Failed to index the file"
+  },
   {
     "id": "ent.elasticsearch.index_post.error",
     "translation": "Failed to index the post"
@@ -6250,6 +6306,18 @@
     "id": "ent.elasticsearch.search_channels.unmarshall_channel_failed",
     "translation": "Failed to decode search results"
   },
+  {
+    "id": "ent.elasticsearch.search_files.disabled",
+    "translation": "Elasticsearch files searching is disabled on this server"
+  },
+  {
+    "id": "ent.elasticsearch.search_files.search_failed",
+    "translation": "Search failed to complete"
+  },
+  {
+    "id": "ent.elasticsearch.search_files.unmarshall_file_failed",
+    "translation": "Failed to decode search results"
+  },
   {
     "id": "ent.elasticsearch.search_posts.disabled",
     "translation": "Elasticsearch searching is disabled on this server"