Generate types for unused schema components

[BerkliumBirb]

Sometimes backend need to pass object that is not referenced explicitly in API or is wrapped in JWS. In such cases backend developers just expose schemas for such types to conduct a contract. NestJS for example have special extra models configuration property.

Oazapfts only generates types for objects used explicitly and all extra objects are silently dropped from generated code. This behavior is not desirable in many cases.

[Xiphe]

I think it would not hurt to just expose all schemas regardless of if they're used within the methods or not 👍

[bonsmik]

Not enough familiar with the code generation but something like this in generate.ts would do the trick:

   if ( this.spec.components && this.spec.components.schemas)  {
      Object.keys(this.spec.components.schemas).forEach((obj) => {
        const alias = this.aliases.find(a=>a.name.text === obj)
        if ( alias === undefined) {
          const oo = (this.spec.components?.schemas as any)[obj];
          const schema = this.resolve<SchemaObject>(oo);
          const type = this.getTypeFromSchema(schema);
          const name = obj
          const identifier = toIdentifier(name, true);
          const alias = this.getUniqueAlias(identifier);
          this.aliases.push(
            cg.createTypeAliasDeclaration({
              modifiers: [cg.modifier.export],
              name: alias,
              type,
            })
          );
        }
      })
    }

Tested with simple test and not sure if this would be feasible to be used in more advanced scenarios

[Xiphe]

Currently don't have the time to proactively add this. PR's are very welcome!

[trim21]

Currently we are also using https://www.npmjs.com/package/openapi-typescript to generate an extra copy of types as a workaround.

types are not bundled and don't affect perf，it's much simpler to just generate them twice for us.