Expose public/ API as submodule (#23345)

* model -> public/model

* plugin -> public/plugin

* public/model/utils -> public/utils

* platform/shared/mlog -> public/shared/mlog

* platform/shared/i18n -> public/shared/i18n

* platform/shared/markdown -> public/shared/markdown

* platform/services/timezones -> public/shared/timezones

* channels/einterfaces -> einterfaces

* expose public/ submodule

* go mod tidy

* .github: cache-dependency-path, setup-go-work

* modules-tidy for public/ too

* remove old gomodtidy

server/public/model/command_test.go

@@ -0,0 +1,117 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCommandIsValid(t *testing.T) {
+	o := Command{
+		Id:          NewId(),
+		Token:       NewId(),
+		CreateAt:    GetMillis(),
+		UpdateAt:    GetMillis(),
+		CreatorId:   NewId(),
+		TeamId:      NewId(),
+		Trigger:     "trigger",
+		URL:         "http://example.com",
+		Method:      CommandMethodGet,
+		DisplayName: "",
+		Description: "",
+	}
+
+	require.Nil(t, o.IsValid())
+
+	o.Id = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Id = NewId()
+	require.Nil(t, o.IsValid())
+
+	o.Token = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Token = NewId()
+	require.Nil(t, o.IsValid())
+
+	o.CreateAt = 0
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.CreateAt = GetMillis()
+	require.Nil(t, o.IsValid())
+
+	o.UpdateAt = 0
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.UpdateAt = GetMillis()
+	require.Nil(t, o.IsValid())
+
+	o.CreatorId = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.CreatorId = NewId()
+	require.Nil(t, o.IsValid())
+
+	o.TeamId = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.TeamId = NewId()
+	require.Nil(t, o.IsValid())
+
+	o.Trigger = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Trigger = strings.Repeat("1", 129)
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Trigger = strings.Repeat("1", 128)
+	require.Nil(t, o.IsValid())
+
+	o.URL = ""
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.URL = "1234"
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.URL = "https:////example.com"
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.URL = "https://example.com"
+	require.Nil(t, o.IsValid())
+
+	o.Method = "https://example.com"
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Method = CommandMethodGet
+	require.Nil(t, o.IsValid())
+
+	o.Method = CommandMethodPost
+	require.Nil(t, o.IsValid())
+
+	o.DisplayName = strings.Repeat("1", 65)
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.DisplayName = strings.Repeat("1", 64)
+	require.Nil(t, o.IsValid())
+
+	o.Description = strings.Repeat("1", 129)
+	require.NotNil(t, o.IsValid(), "should be invalid")
+
+	o.Description = strings.Repeat("1", 128)
+	require.Nil(t, o.IsValid())
+}
+
+func TestCommandPreSave(t *testing.T) {
+	o := Command{}
+	o.PreSave()
+}
+
+func TestCommandPreUpdate(t *testing.T) {
+	o := Command{}
+	o.PreUpdate()
+}