feat: Implement environment update functionality in launchdevly ui

internal/dev_server/adapters/api.go

@@ -6,8 +6,9 @@ import (
 	"net/url"
 	"strconv"
 
-	ldapi "github.com/launchdarkly/api-client-go/v14"
 	"github.com/pkg/errors"
+
+	ldapi "github.com/launchdarkly/api-client-go/v14"
 )
 
 const ctxKeyApi = ctxKey("adapters.api")
@@ -24,6 +25,7 @@ func GetApi(ctx context.Context) Api {
 type Api interface {
 	GetSdkKey(ctx context.Context, projectKey, environmentKey string) (string, error)
 	GetAllFlags(ctx context.Context, projectKey string) ([]ldapi.FeatureFlag, error)
+	GetProjectEnvironments(ctx context.Context, projectKey string) ([]ldapi.Environment, error)
 }
 
 type apiClientApi struct {
@@ -52,13 +54,59 @@ func (a apiClientApi) GetAllFlags(ctx context.Context, projectKey string) ([]lda
 	return flags, err
 }
 
+func (a apiClientApi) GetProjectEnvironments(ctx context.Context, projectKey string) ([]ldapi.Environment, error) {
+	log.Printf("Fetching all environments for project '%s'", projectKey)
+	environments, err := a.getEnvironments(ctx, projectKey, nil)
+	if err != nil {
+		err = errors.Wrap(err, "unable to get environments from LD API")
+	}
+	return environments, err
+}
+
 func (a apiClientApi) getFlags(ctx context.Context, projectKey string, href *string) ([]ldapi.FeatureFlag, error) {
-	var featureFlags *ldapi.FeatureFlags
+	return getPaginatedItems(ctx, projectKey, href, func(ctx context.Context, projectKey string, limit, offset *int64) (*ldapi.FeatureFlags, error) {
+		query := a.apiClient.FeatureFlagsApi.GetFeatureFlags(ctx, projectKey)
+
+		if limit != nil {
+			query = query.Limit(*limit)
+		}
+
+		if offset != nil {
+			query = query.Offset(*offset)
+		}
+
+		flags, _, err := query.
+			Execute()
+		return flags, err
+	})
+}
+
+func (a apiClientApi) getEnvironments(ctx context.Context, projectKey string, href *string) ([]ldapi.Environment, error) {
+	return getPaginatedItems(ctx, projectKey, href, func(ctx context.Context, projectKey string, limit, offset *int64) (*ldapi.Environments, error) {
+		request := a.apiClient.EnvironmentsApi.GetEnvironmentsByProject(ctx, projectKey)
+		if limit != nil {
+			request = request.Limit(*limit)
+		}
+
+		if offset != nil {
+			request = request.Offset(*offset)
+		}
+
+		envs, _, err := request.
+			Execute()
+		return envs, err
+	})
+}
+
+func getPaginatedItems[T any, R interface {
+	GetItems() []T
+	GetLinks() map[string]ldapi.Link
+}](ctx context.Context, projectKey string, href *string, fetchFunc func(context.Context, string, *int64, *int64) (R, error)) ([]T, error) {
+	var result R
 	var err error
+
 	if href == nil {
-		featureFlags, _, err = a.apiClient.FeatureFlagsApi.GetFeatureFlags(ctx, projectKey).
-			Summary(false).
-			Execute()
+		result, err = fetchFunc(ctx, projectKey, nil, nil)
 		if err != nil {
 			return nil, err
 		}
@@ -67,24 +115,25 @@ func (a apiClientApi) getFlags(ctx context.Context, projectKey string, href *str
 		if err != nil {
 			return nil, errors.Wrapf(err, "unable to parse href for next link: %s", *href)
 		}
-		featureFlags, _, err = a.apiClient.FeatureFlagsApi.GetFeatureFlags(ctx, projectKey).
-			Summary(false).
-			Limit(limit).
-			Offset(offset).
-			Execute()
+		result, err = fetchFunc(ctx, projectKey, &limit, &offset)
 		if err != nil {
 			return nil, err
 		}
 	}
-	flags := featureFlags.Items
-	if next, ok := featureFlags.Links["next"]; ok && next.Href != nil {
-		newFlags, err := a.getFlags(ctx, projectKey, next.Href)
-		if err != nil {
-			return nil, err
+
+	items := result.GetItems()
+
+	if links := result.GetLinks(); links != nil {
+		if next, ok := links["next"]; ok && next.Href != nil {
+			newItems, err := getPaginatedItems(ctx, projectKey, next.Href, fetchFunc)
+			if err != nil {
+				return nil, err
+			}
+			items = append(items, newItems...)
 		}
-		flags = append(flags, newFlags...)
 	}
-	return flags, nil
+
+	return items, nil
 }
 
 func parseHref(href string) (limit, offset int64, err error) {

internal/dev_server/adapters/api_test.go

@@ -0,0 +1,148 @@
+package adapters
+
+import (
+	"context"
+	"testing"
+
+	ldapi "github.com/launchdarkly/api-client-go/v14"
+	"github.com/stretchr/testify/assert"
+)
+
+type testItem struct {
+	ID string
+}
+
+type testResult struct {
+	items []testItem
+	links map[string]ldapi.Link
+}
+
+func (r testResult) GetItems() []testItem {
+	return r.items
+}
+
+func (r testResult) GetLinks() map[string]ldapi.Link {
+	return r.links
+}
+
+func TestGetPaginatedItems(t *testing.T) {
+	ctx := context.Background()
+	projectKey := "test-project"
+
+	testCases := []struct {
+		name           string
+		fetchResponses []testResult
+		expectedItems  []testItem
+		expectedError  bool
+	}{
+		{
+			name: "Single page",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{{ID: "1"}, {ID: "2"}},
+					links: map[string]ldapi.Link{},
+				},
+			},
+			expectedItems: []testItem{{ID: "1"}, {ID: "2"}},
+		},
+		{
+			name: "Multiple pages",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{{ID: "1"}, {ID: "2"}},
+					links: map[string]ldapi.Link{
+						"next": {Href: strPtr("http://example.com?limit=2&offset=2")},
+					},
+				},
+				{
+					items: []testItem{{ID: "3"}, {ID: "4"}},
+					links: map[string]ldapi.Link{},
+				},
+			},
+			expectedItems: []testItem{{ID: "1"}, {ID: "2"}, {ID: "3"}, {ID: "4"}},
+		},
+		{
+			name: "Error on second page",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{{ID: "1"}, {ID: "2"}},
+					links: map[string]ldapi.Link{
+						"next": {Href: strPtr("http://example.com?limit=2&offset=2")},
+					},
+				},
+			},
+			expectedError: true,
+		},
+		{
+			name: "Empty response",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{},
+					links: map[string]ldapi.Link{},
+				},
+			},
+			expectedItems: []testItem{},
+		},
+		{
+			name: "Multiple pages with varying item counts",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{{ID: "1"}, {ID: "2"}, {ID: "3"}},
+					links: map[string]ldapi.Link{
+						"next": {Href: strPtr("http://example.com?limit=3&offset=3")},
+					},
+				},
+				{
+					items: []testItem{{ID: "4"}, {ID: "5"}},
+					links: map[string]ldapi.Link{
+						"next": {Href: strPtr("http://example.com?limit=3&offset=5")},
+					},
+				},
+				{
+					items: []testItem{{ID: "6"}},
+					links: map[string]ldapi.Link{},
+				},
+			},
+			expectedItems: []testItem{{ID: "1"}, {ID: "2"}, {ID: "3"}, {ID: "4"}, {ID: "5"}, {ID: "6"}},
+		},
+		{
+			name: "Invalid next link",
+			fetchResponses: []testResult{
+				{
+					items: []testItem{{ID: "1"}, {ID: "2"}},
+					links: map[string]ldapi.Link{
+						"next": {Href: strPtr("invalid-url")},
+					},
+				},
+			},
+			expectedError: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			callCount := 0
+			fetchFunc := func(ctx context.Context, projectKey string, limit, offset *int64) (testResult, error) {
+				if callCount >= len(tc.fetchResponses) {
+					return testResult{}, assert.AnError
+				}
+				result := tc.fetchResponses[callCount]
+				callCount++
+				return result, nil
+			}
+
+			items, err := getPaginatedItems(ctx, projectKey, nil, fetchFunc)
+
+			if tc.expectedError {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tc.expectedItems, items)
+			}
+		})
+	}
+}
+
+func strPtr(s string) *string {
+	return &s
+}

internal/dev_server/api/api.yaml

@@ -129,6 +129,27 @@ paths:
           description: OK. override removed
         404:
           description: no matching override found
+  /dev/projects/{projectKey}/environments:
+    get:
+      operationId: getProjectsEnvironments
+      summary: list all environments for the given project
+      parameters:
+        - $ref: "#/components/parameters/projectKey"
+      responses:
+        200:
+          description: OK. List of environments
+          content:
+            application/json:
+              schema:
+                description: list of environments
+                type: array
+                items:
+                  $ref: "#/components/schemas/Environment"
+                uniqueItems: true
+        404:
+          $ref: "#/components/responses/ErrorResponse"
+        400:
+          $ref: "#/components/responses/ErrorResponse"
 components:
   parameters:
     flagKey:
@@ -224,6 +245,17 @@ components:
           type: integer
           x-go-type: int64
           description: unix timestamp for the lat time the flag values were synced from the source environment
+    Environment:
+      description: Environment
+      type: object
+      required:
+        - key
+        - name
+      properties:
+        key:
+          type: string
+        name:
+          type: string
   responses:
     FlagOverride:
       description: Flag override