configuration.go

// Copyright 2020 Coinbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Generated by: OpenAPI Generator (https://openapi-generator.tech)

package client

import (
	"fmt"
	"net/http"
	"strings"
)

// contextKeys are used to identify the type of value in the context.
// Since these are string, it is possible to get a short description of the
// context key for logging and debugging using key.String().

type contextKey string

func (c contextKey) String() string {
	return "auth " + string(c)
}

var (
	// ContextOAuth2 takes an oauth2.TokenSource as authentication for the request.
	ContextOAuth2 = contextKey("token")

	// ContextBasicAuth takes BasicAuth as authentication for the request.
	ContextBasicAuth = contextKey("basic")

	// ContextAccessToken takes a string oauth2 access token as authentication for the request.
	ContextAccessToken = contextKey("accesstoken")

	// ContextAPIKey takes an APIKey as authentication for the request
	ContextAPIKey = contextKey("apikey")
)

// BasicAuth provides basic http authentication to a request passed via context using
// ContextBasicAuth
type BasicAuth struct {
	UserName string `json:"userName,omitempty"`
	Password string `json:"password,omitempty"`
}

// APIKey provides API key based authentication to a request passed via context using ContextAPIKey
type APIKey struct {
	Key    string
	Prefix string
}

// ServerVariable stores the information about a server variable
type ServerVariable struct {
	Description  string
	DefaultValue string
	EnumValues   []string
}

// ServerConfiguration stores the information about a server
type ServerConfiguration struct {
	URL         string
	Description string
	Variables   map[string]ServerVariable
}

// Configuration stores the configuration of the API client
type Configuration struct {
	BasePath      string            `json:"basePath,omitempty"`
	Host          string            `json:"host,omitempty"`
	Scheme        string            `json:"scheme,omitempty"`
	DefaultHeader map[string]string `json:"defaultHeader,omitempty"`
	UserAgent     string            `json:"userAgent,omitempty"`
	Debug         bool              `json:"debug,omitempty"`
	Servers       []ServerConfiguration
	HTTPClient    *http.Client
}

// NewConfiguration returns a new Configuration object
func NewConfiguration(basePath string, userAgent string, httpClient *http.Client) *Configuration {
	cfg := &Configuration{
		BasePath:      basePath,
		DefaultHeader: make(map[string]string),
		UserAgent:     userAgent,
		Debug:         false,
		Servers: []ServerConfiguration{
			{
				URL:         basePath,
				Description: "No description provided",
			},
		},
	}

	if httpClient != nil {
		cfg.HTTPClient = httpClient
	}

	return cfg
}

// AddDefaultHeader adds a new HTTP header to the default header in the request
func (c *Configuration) AddDefaultHeader(key string, value string) {
	c.DefaultHeader[key] = value
}

// ServerURL returns URL based on server settings
func (c *Configuration) ServerURL(index int, variables map[string]string) (string, error) {
	if index < 0 || len(c.Servers) <= index {
		return "", fmt.Errorf("Index %v out of range %v", index, len(c.Servers)-1)
	}
	server := c.Servers[index]
	url := server.URL

	// go through variables and replace placeholders
	for name, variable := range server.Variables {
		if value, ok := variables[name]; ok {
			found := bool(len(variable.EnumValues) == 0)
			for _, enumValue := range variable.EnumValues {
				if value == enumValue {
					found = true
				}
			}
			if !found {
				return "", fmt.Errorf(
					"The variable %s in the server URL has invalid value %v. Must be %v",
					name,
					value,
					variable.EnumValues,
				)
			}
			url = strings.Replace(url, "{"+name+"}", value, -1)
		} else {
			url = strings.Replace(url, "{"+name+"}", variable.DefaultValue, -1)
		}
	}
	return url, nil
}