Move to SPDX licenses (#449)

* Move to SPDX licenses

Found a way to do this without breaking API compat, so here it is, instead of waiting for v3

Resolves MOD-129
Resolves #396

* License URL updates

* what was I thinking

* Do a thing

* Add open source filter

* Remove dead imports

* Borrow

* Update 20220910132835_spdx-licenses.sql

* Add license text route

* Update migration

* Address comments

src/routes/projects.rs

@@ -857,12 +857,18 @@ pub async fn project_edit(
                     ));
                 }
 
-                let license_id = database::models::categories::License::get_id(
-                    license,
-                    &mut *transaction,
-                )
-                .await?
-                .expect("No database entry found for license");
+                let mut license = license.clone();
+
+                if license.to_lowercase() == "arr" {
+                    license = models::projects::DEFAULT_LICENSE_ID.to_string();
+                }
+
+                spdx::Expression::parse(&*license).map_err(|err| {
+                    ApiError::InvalidInput(format!(
+                        "Invalid SPDX license identifier: {}",
+                        err
+                    ))
+                })?;
 
                 sqlx::query!(
                     "
@@ -870,7 +876,7 @@ pub async fn project_edit(
                     SET license = $1
                     WHERE (id = $2)
                     ",
-                    license_id as database::models::LicenseId,
+                    license,
                     id as database::models::ids::ProjectId,
                 )
                 .execute(&mut *transaction)