v8.0 module release (#22975)

https://mattermost.atlassian.net/browse/MM-52079

```release-note
We upgrade the module version to 8.0. The new module path is github.com/mattermost-server/server/v8.
```


Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

server/model/oauth.go

@@ -0,0 +1,148 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"fmt"
+	"net/http"
+	"unicode/utf8"
+)
+
+const (
+	OAuthActionSignup     = "signup"
+	OAuthActionLogin      = "login"
+	OAuthActionEmailToSSO = "email_to_sso"
+	OAuthActionSSOToEmail = "sso_to_email"
+	OAuthActionMobile     = "mobile"
+)
+
+type OAuthApp struct {
+	Id              string      `json:"id"`
+	CreatorId       string      `json:"creator_id"`
+	CreateAt        int64       `json:"create_at"`
+	UpdateAt        int64       `json:"update_at"`
+	ClientSecret    string      `json:"client_secret"`
+	Name            string      `json:"name"`
+	Description     string      `json:"description"`
+	IconURL         string      `json:"icon_url"`
+	CallbackUrls    StringArray `json:"callback_urls"`
+	Homepage        string      `json:"homepage"`
+	IsTrusted       bool        `json:"is_trusted"`
+	MattermostAppID string      `json:"mattermost_app_id"`
+}
+
+func (a *OAuthApp) Auditable() map[string]interface{} {
+	return map[string]interface{}{
+		"id":                a.Id,
+		"creator_id":        a.CreatorId,
+		"create_at":         a.CreateAt,
+		"update_at":         a.UpdateAt,
+		"name":              a.Name,
+		"description":       a.Description,
+		"icon_url":          a.IconURL,
+		"callback_urls:":    a.CallbackUrls,
+		"homepage":          a.Homepage,
+		"is_trusted":        a.IsTrusted,
+		"mattermost_app_id": a.MattermostAppID,
+	}
+}
+
+// IsValid validates the app and returns an error if it isn't configured
+// correctly.
+func (a *OAuthApp) IsValid() *AppError {
+
+	if !IsValidId(a.Id) {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.app_id.app_error", nil, "", http.StatusBadRequest)
+	}
+
+	if a.CreateAt == 0 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.create_at.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if a.UpdateAt == 0 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.update_at.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if !IsValidId(a.CreatorId) {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.creator_id.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if a.ClientSecret == "" || len(a.ClientSecret) > 128 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.client_secret.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if a.Name == "" || len(a.Name) > 64 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.name.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if len(a.CallbackUrls) == 0 || len(fmt.Sprintf("%s", a.CallbackUrls)) > 1024 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.callback.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	for _, callback := range a.CallbackUrls {
+		if !IsValidHTTPURL(callback) {
+			return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.callback.app_error", nil, "", http.StatusBadRequest)
+		}
+	}
+
+	if a.Homepage == "" || len(a.Homepage) > 256 || !IsValidHTTPURL(a.Homepage) {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.homepage.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if utf8.RuneCountInString(a.Description) > 512 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.description.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	if a.IconURL != "" {
+		if len(a.IconURL) > 512 || !IsValidHTTPURL(a.IconURL) {
+			return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.icon_url.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+		}
+	}
+
+	if len(a.MattermostAppID) > 32 {
+		return NewAppError("OAuthApp.IsValid", "model.oauth.is_valid.mattermost_app_id.app_error", nil, "app_id="+a.Id, http.StatusBadRequest)
+	}
+
+	return nil
+}
+
+// PreSave will set the Id and ClientSecret if missing.  It will also fill
+// in the CreateAt, UpdateAt times. It should be run before saving the app to the db.
+func (a *OAuthApp) PreSave() {
+	if a.Id == "" {
+		a.Id = NewId()
+	}
+
+	if a.ClientSecret == "" {
+		a.ClientSecret = NewId()
+	}
+
+	a.CreateAt = GetMillis()
+	a.UpdateAt = a.CreateAt
+}
+
+// PreUpdate should be run before updating the app in the db.
+func (a *OAuthApp) PreUpdate() {
+	a.UpdateAt = GetMillis()
+}
+
+// Generate a valid strong etag so the browser can cache the results
+func (a *OAuthApp) Etag() string {
+	return Etag(a.Id, a.UpdateAt)
+}
+
+// Remove any private data from the app object
+func (a *OAuthApp) Sanitize() {
+	a.ClientSecret = ""
+}
+
+func (a *OAuthApp) IsValidRedirectURL(url string) bool {
+	for _, u := range a.CallbackUrls {
+		if u == url {
+			return true
+		}
+	}
+
+	return false
+}