export function verifyUniqueness()

in compiler/src/model/utils.ts [1317:1448]
113 lines of code
42 McCabe index (conditional complexity)

export function verifyUniqueness (project: Project): void {
  const types: Map<string, string[]> = new Map()
  const common: string[] = []

  // get global `_types`
  for (const sourceFile of project.getSourceFiles()) {
    const path = dirname(sourceFile.getFilePath().replace(/.*[/\\]specification[/\\]?/, ''))
    if (!path.startsWith('_types')) continue

    for (const declaration of sourceFile.getClasses()) {
      const name = declaration.getName()
      assert(declaration, name != null, 'Anonymous classes cannot exists')
      assert(declaration, !name.endsWith('Request') && !name.endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(name), `${name} is already defined in the global types`)
      common.push(name)
    }

    for (const declaration of sourceFile.getInterfaces()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      common.push(declaration.getName())
    }

    for (const declaration of sourceFile.getEnums()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      common.push(declaration.getName())
    }

    for (const declaration of sourceFile.getTypeAliases()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      common.push(declaration.getName())
    }
  }

  // nested `_types`
  for (const sourceFile of project.getSourceFiles()) {
    const path = dirname(sourceFile.getFilePath().replace(/.*[/\\]specification[/\\]?/, ''))
    if (path.startsWith('_types')) continue
    if (!path.includes('_types')) continue

    const namespace = path.startsWith('_global') ? `_global${'/'}${path.split('/')[1]}` : path.split('/')[0]
    const names = types.get(namespace) ?? []

    for (const declaration of sourceFile.getClasses()) {
      const name = declaration.getName()
      assert(declaration, name != null, 'Anonymous classes cannot exists')
      assert(declaration, !name.endsWith('Request') && !name.endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(name), `${name} is already defined in ${namespace} is already defined in the global types`)
      assert(declaration, !names.includes(name), `${name} is already defined in ${namespace} local types`)
      names.push(name)
    }

    for (const declaration of sourceFile.getInterfaces()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    for (const declaration of sourceFile.getEnums()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    for (const declaration of sourceFile.getTypeAliases()) {
      assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    types.set(namespace, names)
  }

  // every other namespaced type
  for (const sourceFile of project.getSourceFiles()) {
    const path = dirname(sourceFile.getFilePath().replace(/.*[/\\]specification[/\\]?/, ''))
    if (path.includes('_types')) continue

    const namespace = path.startsWith('_global') ? `_global${'/'}${path.split('/')[1]}` : path.split('/')[0]
    const names = types.get(path) ?? []
    const localTypes = types.get(namespace) ?? []

    for (const declaration of sourceFile.getClasses()) {
      const name = declaration.getName()
      assert(declaration, name != null, 'Anonymous classes cannot exists')
      if (name !== 'Request' && name !== 'Response') {
        assert(declaration, !name.endsWith('Request') && !name.endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      }
      assert(declaration, !names.includes(name), `${name} is already defined`)
      assert(declaration, !common.includes(name), `${name} is already defined in the global types`)
      assert(declaration, !localTypes.includes(name), `${name} is already defined in ${namespace} local types`)
      names.push(name)
    }

    for (const declaration of sourceFile.getInterfaces()) {
      if (declaration.getName() !== 'Request' && declaration.getName() !== 'Response') {
        assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      }
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined`)
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !localTypes.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    for (const declaration of sourceFile.getEnums()) {
      if (declaration.getName() !== 'Request' && declaration.getName() !== 'Response') {
        assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      }
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined`)
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !localTypes.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    for (const declaration of sourceFile.getTypeAliases()) {
      if (declaration.getName() !== 'Request' && declaration.getName() !== 'Response') {
        assert(declaration, !declaration.getName().endsWith('Request') && !declaration.getName().endsWith('Response'), 'A type cannot end with "Request" or "Response"')
      }
      assert(declaration, !names.includes(declaration.getName()), `${declaration.getName()} is already defined`)
      assert(declaration, !common.includes(declaration.getName()), `${declaration.getName()} is already defined in the global types`)
      assert(declaration, !localTypes.includes(declaration.getName()), `${declaration.getName()} is already defined in ${namespace} local types`)
      names.push(declaration.getName())
    }

    types.set(path, names)
  }
}