[TYPESCRIPT-ANGULAR] File list in multipart breaks ganerated angular client

[wutzebaer]

Description

I define a list of files on my yaml file and the gernerated angular code is broken

Swagger-codegen version

v3.0.16

Swagger declaration file content or url

openapi: 3.0.1
info:
  title: OpenAPI definition
  version: v0
servers:
  - url: 'http://localhost:8080'
    description: Generated server url
paths:
  '/kunde/{kundenId}/message':
    post:
      tags:
        - kunde-controller
      operationId: uploadmessage
      parameters:
        - name: kundenId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                message:
                  type: string
                files:
                  type: array
                  items:
                    type: string
                    format: binary
      responses:
        '200':
          description: default response

Command line used for generation

java -jar swagger-codegen-cli.jar generate -i input.yaml -l typescript-angular

Steps to reproduce

git clone https://github.com/swagger-api/swagger-codegen --branch v3.0.16
mvn -f swagger-codegen/pom.xml clean package -DskipTest=true
copy swagger-codegen\modules\swagger-codegen-cli\target\swagger-codegen-cli.jar .
java -jar swagger-codegen-cli.jar generate -i input.yaml -l typescript-angular

Suggest a fix/enhancement

When i define one file it works correctly and generates the following code

        let useForm = false;
        let convertFormParamsToString = false;
        // use FormData to transmit files using content-type "multipart/form-data"
        // see https://stackoverflow.com/questions/4007969/application-x-www-form-urlencoded-or-multipart-form-data
        useForm = canConsumeForm;
        if (useForm) {

when defining as list it generates this, the canConsumeForm-part is missing

        let useForm = false;
        let convertFormParamsToString = false;
        if (useForm) {

when i manually set useForm=true in the generated code, everything works fine

[majster]

Mustache template has this prepared (type="string", format="binary"), but Codegen is still checking if type == "file".

https://github.com/OpenAPITools/openapi-generator/blob/478219744e71b1faf6e6d5dee7c15a24605429f1/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java#L4803

Workaround is to implement service by hand :(