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feat(httpserver): add list subscriptions endpoint
This change introduces a new HTTP endpoint to list user subscriptions. It includes the necessary request handling, response formatting, and unit tests to ensure correct functionality. The endpoint supports pagination.
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‎backend/pkg/httpserver/list_subscriptions.go‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httpserver
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import (
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"context"
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"log/slog"
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"github.com/GoogleChrome/webstatus.dev/lib/gen/openapi/backend"
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)
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// nolint:ireturn, revive // Expected ireturn for openapi generation.
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func (s *Server) ListSubscriptions(
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ctx context.Context,
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request backend.ListSubscriptionsRequestObject,
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) (backend.ListSubscriptionsResponseObject, error) {
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userCheck := CheckAuthenticatedUser[backend.ListSubscriptionsResponseObject](ctx, "ListSubscriptions",
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func(code int, message string) backend.ListSubscriptionsResponseObject {
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return backend.ListSubscriptions500JSONResponse(backend.BasicErrorModel{Code: code, Message: message})
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})
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if userCheck.User == nil {
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return userCheck.Response, nil
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}
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resp, err := s.wptMetricsStorer.ListSavedSearchSubscriptions(
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ctx, userCheck.User.ID, getPageSizeOrDefault(request.Params.PageSize), request.Params.PageToken)
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if err != nil {
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slog.ErrorContext(ctx, "unable to get page of subscriptions", "error", err)
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return backend.ListSubscriptions500JSONResponse{
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Code: 500,
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Message: "could not list subscriptions",
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}, nil
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}
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return backend.ListSubscriptions200JSONResponse(*resp), nil
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}

‎backend/pkg/httpserver/list_subscriptions_test.go‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httpserver
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import (
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"github.com/GoogleChrome/webstatus.dev/lib/auth"
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"github.com/GoogleChrome/webstatus.dev/lib/backendtypes"
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"github.com/GoogleChrome/webstatus.dev/lib/gen/openapi/backend"
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)
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func TestListSubscriptions(t *testing.T) {
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now := time.Now()
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testUser := &auth.User{
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ID: "test-user",
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GitHubUserID: nil,
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}
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testCases := []struct {
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name string
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cfg *MockListSavedSearchSubscriptionsConfig
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expectedCallCount int
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authMiddlewareOption testServerOption
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request *http.Request
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expectedResponse *http.Response
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}{
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{
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name: "success",
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cfg: &MockListSavedSearchSubscriptionsConfig{
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expectedUserID: "test-user",
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expectedPageSize: 100,
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expectedPageToken: nil,
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output: &backend.SubscriptionPage{
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Data: &[]backend.SubscriptionResponse{
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{
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Id: "sub-id",
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ChannelId: "channel-id",
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SavedSearchId: "search-id",
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Triggers: []backend.SubscriptionTriggerResponseItem{
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{
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Value: backendtypes.AttemptToStoreSubscriptionTrigger("trigger"),
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RawValue: nil,
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},
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},
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Frequency: "daily",
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CreatedAt: now,
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UpdatedAt: now,
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},
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},
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Metadata: &backend.PageMetadata{
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NextPageToken: nil,
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},
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},
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err: nil,
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},
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expectedCallCount: 1,
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request: httptest.NewRequest(
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http.MethodGet,
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"/v1/users/me/subscriptions",
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nil,
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),
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expectedResponse: testJSONResponse(http.StatusOK,
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`{
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"data":[
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{
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"id":"sub-id",
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"channel_id":"channel-id",
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"saved_search_id":"search-id",
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"triggers":[{"value":"trigger"}],
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"frequency":"daily",
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"created_at":"`+now.Format(time.RFC3339Nano)+`",
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"updated_at":"`+now.Format(time.RFC3339Nano)+`"
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}
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],
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"metadata":{}}`),
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authMiddlewareOption: withAuthMiddleware(mockAuthMiddleware(testUser)),
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},
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{
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name: "internal server error",
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cfg: &MockListSavedSearchSubscriptionsConfig{
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expectedUserID: "test-user",
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expectedPageSize: 100,
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expectedPageToken: nil,
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output: nil,
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err: errTest,
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},
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expectedCallCount: 1,
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request: httptest.NewRequest(
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http.MethodGet,
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"/v1/users/me/subscriptions",
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nil,
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),
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expectedResponse: testJSONResponse(http.StatusInternalServerError,
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`{
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"code":500,
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"message":"could not list subscriptions"
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}`),
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authMiddlewareOption: withAuthMiddleware(mockAuthMiddleware(testUser)),
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},
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{
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name: "success with page token and size",
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cfg: &MockListSavedSearchSubscriptionsConfig{
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expectedUserID: "test-user",
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expectedPageSize: 50,
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expectedPageToken: valuePtr("page-token"),
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err: nil,
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output: &backend.SubscriptionPage{
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Data: &[]backend.SubscriptionResponse{
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{
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Id: "sub-id-2",
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ChannelId: "channel-id-2",
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SavedSearchId: "search-id-2",
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Triggers: []backend.SubscriptionTriggerResponseItem{
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{
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Value: backendtypes.AttemptToStoreSubscriptionTrigger("trigger-2"),
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RawValue: nil,
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},
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},
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Frequency: "weekly",
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CreatedAt: now,
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UpdatedAt: now,
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},
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},
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Metadata: &backend.PageMetadata{
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NextPageToken: valuePtr("next-page-token"),
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},
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},
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},
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expectedCallCount: 1,
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request: httptest.NewRequest(
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http.MethodGet,
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"/v1/users/me/subscriptions?page_size=50&page_token=page-token",
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nil,
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),
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expectedResponse: testJSONResponse(http.StatusOK,
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`{
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"data":[
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{
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"id":"sub-id-2",
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"channel_id":"channel-id-2",
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"saved_search_id":"search-id-2",
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"triggers":[{"value":"trigger-2"}],
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"frequency":"weekly",
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"created_at":"`+now.Format(time.RFC3339Nano)+`",
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"updated_at":"`+now.Format(time.RFC3339Nano)+`"
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}
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],
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"metadata":{
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"next_page_token":"next-page-token"
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}
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}`),
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authMiddlewareOption: withAuthMiddleware(mockAuthMiddleware(testUser)),
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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//nolint:exhaustruct
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mockStorer := &MockWPTMetricsStorer{
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listSavedSearchSubscriptionsCfg: tc.cfg,
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t: t,
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}
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myServer := Server{
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wptMetricsStorer: mockStorer,
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metadataStorer: nil,
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userGitHubClientFactory: nil,
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operationResponseCaches: nil,
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baseURL: getTestBaseURL(t),
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}
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assertTestServerRequest(t, &myServer, tc.request, tc.expectedResponse, tc.authMiddlewareOption)
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assertMocksExpectations(t,
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tc.expectedCallCount,
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mockStorer.callCountListSavedSearchSubscriptions,
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"ListSavedSearchSubscriptions",
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nil)
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})
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}
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}

‎backend/pkg/httpserver/server_test.go‎

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panic("unimplemented")
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}
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// ListSubscriptions implements backend.StrictServerInterface.
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// nolint: ireturn // WONTFIX - generated method signature
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func (m *mockServerInterface) ListSubscriptions(ctx context.Context,
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_ backend.ListSubscriptionsRequestObject) (
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backend.ListSubscriptionsResponseObject, error) {
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assertUserInCtx(ctx, m.t, m.expectedUserInCtx)
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m.callCount++
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panic("unimplemented")
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}
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func (m *mockServerInterface) assertCallCount(expectedCallCount int) {
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if m.callCount != expectedCallCount {
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m.t.Errorf("expected mock server to be used %d times. only used %d times", expectedCallCount, m.callCount)

‎openapi/backend/openapi.yaml‎

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@@ -1066,7 +1066,46 @@ paths:
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/v1/users/me/subscriptions:
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description: Operations for managing user subscriptions to saved searches.
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# POST operation to create a new subscription (to be added in a future PR)
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# GET operation to list user's subscriptions (to be added in a future PR)
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# GET operation to list user's subscriptions
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get:
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summary: List subscriptions for a saved search
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operationId: listSubscriptions
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security:
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- bearerAuth: []
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parameters:
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- $ref: '#/components/parameters/paginationTokenParam'
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- $ref: '#/components/parameters/paginationSizeParam'
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responses:
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'200':
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description: OK
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/SubscriptionPage'
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'400':
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description: Bad Input
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/BasicErrorModel'
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'401':
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description: Unauthorized
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/BasicErrorModel'
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'403':
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description: Forbidden
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/BasicErrorModel'
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'500':
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description: Internal Service Error
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/BasicErrorModel'
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/v1/users/me/subscriptions/{subscription_id}:
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description: Operations for managing a specific user subscription.
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parameters:
@@ -1649,7 +1688,6 @@ components:
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description: >
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The original, raw value from the database. Only present if the 'value'
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is 'unknown', allowing clients to identify and manage deprecated triggers.
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nullable: true
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required:
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- value
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SubscriptionBase:

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