Allow to specify ordering when retrieving meta data

The query now searches in more fields. For example, when getting a
list of tags, the query is applied to the tag name *and* category.
When listing persons, the query now also looks in the associated
organization name.

This has been used to make some headers in the meta data tables
clickable to sort the list accordingly.

Refs: #965, #538

modules/webapp/src/main/elm/Data/CustomFieldOrder.elm

@@ -0,0 +1,31 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.CustomFieldOrder exposing (CustomFieldOrder(..), asString)
+
+
+type CustomFieldOrder
+    = LabelAsc
+    | LabelDesc
+    | FormatAsc
+    | FormatDesc
+
+
+asString : CustomFieldOrder -> String
+asString order =
+    case order of
+        LabelAsc ->
+            "label"
+
+        LabelDesc ->
+            "-label"
+
+        FormatAsc ->
+            "type"
+
+        FormatDesc ->
+            "-type"

modules/webapp/src/main/elm/Data/EquipmentOrder.elm

@@ -0,0 +1,23 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.EquipmentOrder exposing (EquipmentOrder(..), asString)
+
+
+type EquipmentOrder
+    = NameAsc
+    | NameDesc
+
+
+asString : EquipmentOrder -> String
+asString order =
+    case order of
+        NameAsc ->
+            "name"
+
+        NameDesc ->
+            "-name"

modules/webapp/src/main/elm/Data/FolderOrder.elm

@@ -0,0 +1,31 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.FolderOrder exposing (FolderOrder(..), asString)
+
+
+type FolderOrder
+    = NameAsc
+    | NameDesc
+    | OwnerAsc
+    | OwnerDesc
+
+
+asString : FolderOrder -> String
+asString order =
+    case order of
+        NameAsc ->
+            "name"
+
+        NameDesc ->
+            "-name"
+
+        OwnerAsc ->
+            "owner"
+
+        OwnerDesc ->
+            "-owner"

modules/webapp/src/main/elm/Data/OrganizationOrder.elm

@@ -0,0 +1,23 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.OrganizationOrder exposing (OrganizationOrder(..), asString)
+
+
+type OrganizationOrder
+    = NameAsc
+    | NameDesc
+
+
+asString : OrganizationOrder -> String
+asString order =
+    case order of
+        NameAsc ->
+            "name"
+
+        NameDesc ->
+            "-name"

modules/webapp/src/main/elm/Data/PersonOrder.elm

@@ -0,0 +1,31 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.PersonOrder exposing (PersonOrder(..), asString)
+
+
+type PersonOrder
+    = NameAsc
+    | NameDesc
+    | OrgAsc
+    | OrgDesc
+
+
+asString : PersonOrder -> String
+asString order =
+    case order of
+        NameAsc ->
+            "name"
+
+        NameDesc ->
+            "-name"
+
+        OrgAsc ->
+            "org"
+
+        OrgDesc ->
+            "-org"

modules/webapp/src/main/elm/Data/TagOrder.elm

@@ -0,0 +1,31 @@
+{-
+   Copyright 2020 Docspell Contributors
+
+   SPDX-License-Identifier: GPL-3.0-or-later
+-}
+
+
+module Data.TagOrder exposing (TagOrder(..), asString)
+
+
+type TagOrder
+    = NameAsc
+    | NameDesc
+    | CategoryAsc
+    | CategoryDesc
+
+
+asString : TagOrder -> String
+asString order =
+    case order of
+        NameAsc ->
+            "name"
+
+        NameDesc ->
+            "-name"
+
+        CategoryAsc ->
+            "category"
+
+        CategoryDesc ->
+            "-category"