1// Code generated by smithy-go-codegen DO NOT EDIT.
2
3package appconfig
4
5import (
6	"context"
7	"fmt"
8	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
9	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
10	"github.com/aws/aws-sdk-go-v2/service/appconfig/types"
11	"github.com/aws/smithy-go/middleware"
12	smithyhttp "github.com/aws/smithy-go/transport/http"
13)
14
15// List the environments for an application.
16func (c *Client) ListEnvironments(ctx context.Context, params *ListEnvironmentsInput, optFns ...func(*Options)) (*ListEnvironmentsOutput, error) {
17	if params == nil {
18		params = &ListEnvironmentsInput{}
19	}
20
21	result, metadata, err := c.invokeOperation(ctx, "ListEnvironments", params, optFns, addOperationListEnvironmentsMiddlewares)
22	if err != nil {
23		return nil, err
24	}
25
26	out := result.(*ListEnvironmentsOutput)
27	out.ResultMetadata = metadata
28	return out, nil
29}
30
31type ListEnvironmentsInput struct {
32
33	// The application ID.
34	//
35	// This member is required.
36	ApplicationId *string
37
38	// The maximum number of items to return for this call. The call also returns a
39	// token that you can specify in a subsequent call to get the next set of results.
40	MaxResults int32
41
42	// A token to start the list. Use this token to get the next set of results.
43	NextToken *string
44}
45
46type ListEnvironmentsOutput struct {
47
48	// The elements from this collection.
49	Items []types.Environment
50
51	// The token for the next set of items to return. Use this token to get the next
52	// set of results.
53	NextToken *string
54
55	// Metadata pertaining to the operation's result.
56	ResultMetadata middleware.Metadata
57}
58
59func addOperationListEnvironmentsMiddlewares(stack *middleware.Stack, options Options) (err error) {
60	err = stack.Serialize.Add(&awsRestjson1_serializeOpListEnvironments{}, middleware.After)
61	if err != nil {
62		return err
63	}
64	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpListEnvironments{}, middleware.After)
65	if err != nil {
66		return err
67	}
68	if err = addSetLoggerMiddleware(stack, options); err != nil {
69		return err
70	}
71	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
72		return err
73	}
74	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
75		return err
76	}
77	if err = addResolveEndpointMiddleware(stack, options); err != nil {
78		return err
79	}
80	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
81		return err
82	}
83	if err = addRetryMiddlewares(stack, options); err != nil {
84		return err
85	}
86	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
87		return err
88	}
89	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
90		return err
91	}
92	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
93		return err
94	}
95	if err = addClientUserAgent(stack); err != nil {
96		return err
97	}
98	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
99		return err
100	}
101	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
102		return err
103	}
104	if err = addOpListEnvironmentsValidationMiddleware(stack); err != nil {
105		return err
106	}
107	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opListEnvironments(options.Region), middleware.Before); err != nil {
108		return err
109	}
110	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
111		return err
112	}
113	if err = addResponseErrorMiddleware(stack); err != nil {
114		return err
115	}
116	if err = addRequestResponseLogging(stack, options); err != nil {
117		return err
118	}
119	return nil
120}
121
122// ListEnvironmentsAPIClient is a client that implements the ListEnvironments
123// operation.
124type ListEnvironmentsAPIClient interface {
125	ListEnvironments(context.Context, *ListEnvironmentsInput, ...func(*Options)) (*ListEnvironmentsOutput, error)
126}
127
128var _ ListEnvironmentsAPIClient = (*Client)(nil)
129
130// ListEnvironmentsPaginatorOptions is the paginator options for ListEnvironments
131type ListEnvironmentsPaginatorOptions struct {
132	// The maximum number of items to return for this call. The call also returns a
133	// token that you can specify in a subsequent call to get the next set of results.
134	Limit int32
135
136	// Set to true if pagination should stop if the service returns a pagination token
137	// that matches the most recent token provided to the service.
138	StopOnDuplicateToken bool
139}
140
141// ListEnvironmentsPaginator is a paginator for ListEnvironments
142type ListEnvironmentsPaginator struct {
143	options   ListEnvironmentsPaginatorOptions
144	client    ListEnvironmentsAPIClient
145	params    *ListEnvironmentsInput
146	nextToken *string
147	firstPage bool
148}
149
150// NewListEnvironmentsPaginator returns a new ListEnvironmentsPaginator
151func NewListEnvironmentsPaginator(client ListEnvironmentsAPIClient, params *ListEnvironmentsInput, optFns ...func(*ListEnvironmentsPaginatorOptions)) *ListEnvironmentsPaginator {
152	options := ListEnvironmentsPaginatorOptions{}
153	if params.MaxResults != 0 {
154		options.Limit = params.MaxResults
155	}
156
157	for _, fn := range optFns {
158		fn(&options)
159	}
160
161	if params == nil {
162		params = &ListEnvironmentsInput{}
163	}
164
165	return &ListEnvironmentsPaginator{
166		options:   options,
167		client:    client,
168		params:    params,
169		firstPage: true,
170	}
171}
172
173// HasMorePages returns a boolean indicating whether more pages are available
174func (p *ListEnvironmentsPaginator) HasMorePages() bool {
175	return p.firstPage || p.nextToken != nil
176}
177
178// NextPage retrieves the next ListEnvironments page.
179func (p *ListEnvironmentsPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListEnvironmentsOutput, error) {
180	if !p.HasMorePages() {
181		return nil, fmt.Errorf("no more pages available")
182	}
183
184	params := *p.params
185	params.NextToken = p.nextToken
186
187	params.MaxResults = p.options.Limit
188
189	result, err := p.client.ListEnvironments(ctx, &params, optFns...)
190	if err != nil {
191		return nil, err
192	}
193	p.firstPage = false
194
195	prevToken := p.nextToken
196	p.nextToken = result.NextToken
197
198	if p.options.StopOnDuplicateToken && prevToken != nil && p.nextToken != nil && *prevToken == *p.nextToken {
199		p.nextToken = nil
200	}
201
202	return result, nil
203}
204
205func newServiceMetadataMiddleware_opListEnvironments(region string) *awsmiddleware.RegisterServiceMetadata {
206	return &awsmiddleware.RegisterServiceMetadata{
207		Region:        region,
208		ServiceID:     ServiceID,
209		SigningName:   "appconfig",
210		OperationName: "ListEnvironments",
211	}
212}
213