Add missing tabs to org projects page (#22705)

Fixes https://github.com/go-gitea/gitea/issues/22676

Context Data `IsOrganizationMember` and `IsOrganizationOwner` is used to
control the visibility of `people` and `team` tab.

https://github.com/go-gitea/gitea/blob/2871ea08096cba15546f357d0ec473734ee9d8be/templates/org/menu.tmpl#L19-L40

And because of the reuse of user projects page, User Context is changed
to Organization Context. But the value of `IsOrganizationMember` and
`IsOrganizationOwner` are not being given.

I reused func `HandleOrgAssignment` to add them to the ctx, but may have
some unnecessary variables, idk whether it is ok.

I found there is a missing `PageIsViewProjects` at create project page.

2 files changed, 31 insertions, 0 deletions

diff --git a/models/organization/org.go b/models/organization/org.go
index f05027be7..269b3e832 100644
--- a/models/organization/org.go
+++ b/models/organization/org.go
@@ -239,6 +239,32 @@ func (org *Organization) CustomAvatarRelativePath() string {
 	return org.Avatar
 }
 
+// UnitPermission returns unit permission
+func (org *Organization) UnitPermission(ctx context.Context, doer *user_model.User, unitType unit.Type) perm.AccessMode {
+	if doer != nil {
+		teams, err := GetUserOrgTeams(ctx, org.ID, doer.ID)
+		if err != nil {
+			log.Error("GetUserOrgTeams: %v", err)
+			return perm.AccessModeNone
+		}
+
+		if err := teams.LoadUnits(ctx); err != nil {
+			log.Error("LoadUnits: %v", err)
+			return perm.AccessModeNone
+		}
+
+		if len(teams) > 0 {
+			return teams.UnitMaxAccess(unitType)
+		}
+	}
+
+	if org.Visibility.IsPublic() {
+		return perm.AccessModeRead
+	}
+
+	return perm.AccessModeNone
+}
+
 // CreateOrganization creates record of a new organization.
 func CreateOrganization(org *Organization, owner *user_model.User) (err error) {
 	if !owner.CanCreateOrganization() {
diff --git a/models/user/user.go b/models/user/user.go
index f6fafe64f..454779b9e 100644
--- a/models/user/user.go
+++ b/models/user/user.go
@@ -393,6 +393,11 @@ func (u *User) IsOrganization() bool {
 	return u.Type == UserTypeOrganization
 }
 
+// IsIndividual returns true if user is actually a individual user.
+func (u *User) IsIndividual() bool {
+	return u.Type == UserTypeIndividual
+}
+
 // DisplayName returns full name if it's not empty,
 // returns username otherwise.
 func (u *User) DisplayName() string {