[swift] add option for API prefix (#5567)

* [swift] add option for API prefix

* [swift] update docs

docs/generators/swift5.md

@@ -6,6 +6,7 @@ sidebar_label: swift5
 | Option | Description | Values | Default |
 | ------ | ----------- | ------ | ------- |
 |allowUnicodeIdentifiers|boolean, toggles whether unicode identifiers are allowed in names or not, default is false| |false|
+|apiNamePrefix|Prefix that will be appended to all API names ('tags'). Default: empty string. e.g. Pet => Pet.| |null|
 |ensureUniqueParams|Whether to ensure parameter names are unique in an operation (rename parameters that are not).| |true|
 |hideGenerationTimestamp|Hides the generation timestamp when files are generated.| |true|
 |lenientTypeCast|Accept and cast values for simple types (string->bool, string->int, int->string)| |false|

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConstants.java

@@ -218,6 +218,9 @@ public class CodegenConstants {
     // Codegen constants should define a description and provide proper input validation for the value of serializationLibrary
     public static final String SERIALIZATION_LIBRARY = "serializationLibrary";
 
+    public static final String API_NAME_PREFIX = "apiNamePrefix";
+    public static final String API_NAME_PREFIX_DESC = "Prefix that will be appended to all API names ('tags'). Default: empty string. e.g. Pet => Pet.";
+
     public static final String API_NAME_SUFFIX = "apiNameSuffix";
     public static final String API_NAME_SUFFIX_DESC = "Suffix that will be appended to all API names ('tags'). Default: Api. e.g. Pet => PetApi. Note: Only ruby, python, jaxrs generators suppport this feature at the moment.";
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -150,7 +150,7 @@ public class DefaultCodegen implements CodegenConfig {
     protected Map<String, String> importMapping = new HashMap<String, String>();
     protected String modelPackage = "", apiPackage = "", fileSuffix;
     protected String modelNamePrefix = "", modelNameSuffix = "";
-    protected String apiNameSuffix = "Api";
+    protected String apiNamePrefix = "", apiNameSuffix = "Api";
     protected String testPackage = "";
     /*
     apiTemplateFiles are for API outputs only (controllers/handlers).
@@ -268,6 +268,10 @@ public class DefaultCodegen implements CodegenConfig {
                     .get(CodegenConstants.ALLOW_UNICODE_IDENTIFIERS).toString()));
         }
 
+        if (additionalProperties.containsKey(CodegenConstants.API_NAME_PREFIX)) {
+            this.setApiNamePrefix((String) additionalProperties.get(CodegenConstants.API_NAME_PREFIX));
+        }
+
         if (additionalProperties.containsKey(CodegenConstants.API_NAME_SUFFIX)) {
             this.setApiNameSuffix((String) additionalProperties.get(CodegenConstants.API_NAME_SUFFIX));
         }
@@ -1042,6 +1046,14 @@ public class DefaultCodegen implements CodegenConfig {
         this.apiNameSuffix = apiNameSuffix;
     }
 
+    public String getApiNamePrefix() {
+        return apiNamePrefix;
+    }
+
+    public void setApiNamePrefix(String apiNamePrefix) {
+        this.apiNamePrefix = apiNamePrefix;
+    }
+
     public void setApiPackage(String apiPackage) {
         this.apiPackage = apiPackage;
     }
@@ -2018,7 +2030,7 @@ public class DefaultCodegen implements CodegenConfig {
         if (name.length() == 0) {
             return "DefaultApi";
         }
-        return camelize(name + "_" + apiNameSuffix);
+        return camelize(apiNamePrefix + "_" + name + "_" + apiNameSuffix);
     }
 
     /**

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/Swift5ClientCodegen.java

@@ -248,6 +248,8 @@ public class Swift5ClientCodegen extends DefaultCodegen implements CodegenConfig
                         + "string->int, int->string)")
                 .defaultValue(Boolean.FALSE.toString()));
 
+        cliOptions.add(new CliOption(CodegenConstants.API_NAME_PREFIX, CodegenConstants.API_NAME_PREFIX_DESC));
+
         supportedLibraries.put(LIBRARY_URLSESSION, "[DEFAULT] HTTP client: URLSession");
         supportedLibraries.put(LIBRARY_ALAMOFIRE, "HTTP client: Alamofire");
 
@@ -636,7 +638,7 @@ public class Swift5ClientCodegen extends DefaultCodegen implements CodegenConfig
         if (name.length() == 0) {
             return "DefaultAPI";
         }
-        return camelize(name) + "API";
+        return camelize(apiNamePrefix + "_" + name) + "API";
     }
 
     @Override

modules/openapi-generator/src/test/java/org/openapitools/codegen/options/Swift5OptionsProvider.java

@@ -78,6 +78,7 @@ public class Swift5OptionsProvider implements OptionsProvider {
                 .put(CodegenConstants.HIDE_GENERATION_TIMESTAMP, "true")
                 .put(CodegenConstants.ALLOW_UNICODE_IDENTIFIERS, ALLOW_UNICODE_IDENTIFIERS_VALUE)
                 .put(CodegenConstants.PREPEND_FORM_OR_BODY_PARAMETERS, PREPEND_FORM_OR_BODY_PARAMETERS_VALUE)
+                .put(CodegenConstants.API_NAME_PREFIX, "")
                 .put(CodegenConstants.LIBRARY, LIBRARY_VALUE)
                 .build();
     }