[bugfix] Return all accounts when list accounts limit <= 0 (#2014)

docs/api/swagger.yaml

@@ -4873,9 +4873,11 @@ paths:
                   in: query
                   name: min_id
                   type: string
-                - default: 20
+                - default: 40
-                  description: Number of accounts to return.
+                  description: 'Number of accounts to return. If set to 0 explicitly, all accounts in the list will be returned, and pagination headers will not be used. This is a workaround for Mastodon API peculiarities: https://docs.joinmastodon.org/methods/lists/#query-parameters.'
                   in: query
+                  maximum: 80
+                  minimum: 0
                   name: limit
                   type: integer
             produces:

internal/api/client/lists/listaccounts.go

@@ -79,8 +79,13 @@
 //	-
 //		name: limit
 //		type: integer
-//		description: Number of accounts to return.
+//		description: >-
-//		default: 20
+//			Number of accounts to return.
+//			If set to 0 explicitly, all accounts in the list will be returned, and pagination headers will not be used.
+//			This is a workaround for Mastodon API peculiarities: https://docs.joinmastodon.org/methods/lists/#query-parameters.
+//		default: 40
+//		minimum: 0
+//		maximum: 80
 //		in: query
 //		required: false
 //
@@ -129,14 +134,31 @@ func (m *Module) ListAccountsGETHandler(c *gin.Context) {
 		return
 	}
 
-	limit, errWithCode := apiutil.ParseLimit(c.Query(apiutil.LimitKey), 20, 40, 1)
+	limit, errWithCode := apiutil.ParseLimit(c.Query(apiutil.LimitKey), 40, 80, 0)
 	if errWithCode != nil {
 		apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
 		return
 	}
 
+	var (
+		ctx = c.Request.Context()
+	)
+
+	if limit == 0 {
+		// Return all accounts in the list without pagination.
+		accounts, errWithCode := m.processor.List().GetAllListAccounts(ctx, authed.Account, targetListID)
+		if errWithCode != nil {
+			apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
+			return
+		}
+
+		c.JSON(http.StatusOK, accounts)
+		return
+	}
+
+	// Return subset of accounts in the list with pagination.
 	resp, errWithCode := m.processor.List().GetListAccounts(
-		c.Request.Context(),
+		ctx,
 		authed.Account,
 		targetListID,
 		c.Query(MaxIDKey),

internal/api/client/lists/listaccounts_test.go

@@ -0,0 +1,246 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package lists_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/lists"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type ListAccountsTestSuite struct {
+	ListsStandardTestSuite
+}
+
+func (suite *ListAccountsTestSuite) getListAccounts(
+	expectedHTTPStatus int,
+	expectedBody string,
+	listID string,
+	maxID string,
+	sinceID string,
+	minID string,
+	limit *int,
+) (
+	[]*apimodel.Account,
+	string, // Link header
+	error,
+) {
+
+	var (
+		recorder = httptest.NewRecorder()
+		ctx, _   = testrig.CreateGinTestContext(recorder, nil)
+	)
+
+	// Prepare test context.
+	ctx.Set(oauth.SessionAuthorizedAccount, suite.testAccounts["local_account_1"])
+	ctx.Set(oauth.SessionAuthorizedToken, oauth.DBTokenToToken(suite.testTokens["local_account_1"]))
+	ctx.Set(oauth.SessionAuthorizedApplication, suite.testApplications["application_1"])
+	ctx.Set(oauth.SessionAuthorizedUser, suite.testUsers["local_account_1"])
+
+	// Inject path parameters.
+	ctx.AddParam("id", listID)
+
+	// Inject query parameters.
+	requestPath := config.GetProtocol() + "://" + config.GetHost() + "/api/" + lists.BasePath + "/" + listID + "/accounts"
+
+	if limit != nil {
+		requestPath += "?limit=" + strconv.Itoa(*limit)
+	} else {
+		requestPath += "?limit=40"
+	}
+	if maxID != "" {
+		requestPath += "&" + apiutil.MaxIDKey + "=" + maxID
+	}
+	if sinceID != "" {
+		requestPath += "&" + apiutil.SinceIDKey + "=" + sinceID
+	}
+	if minID != "" {
+		requestPath += "&" + apiutil.MinIDKey + "=" + minID
+	}
+
+	// Prepare test context request.
+	request := httptest.NewRequest(http.MethodGet, requestPath, nil)
+	request.Header.Set("accept", "application/json")
+	ctx.Request = request
+
+	// trigger the handler
+	suite.listsModule.ListAccountsGETHandler(ctx)
+
+	// read the response
+	result := recorder.Result()
+	defer result.Body.Close()
+
+	b, err := ioutil.ReadAll(result.Body)
+	if err != nil {
+		return nil, "", err
+	}
+
+	errs := gtserror.MultiError{}
+
+	// check code + body
+	if resultCode := recorder.Code; expectedHTTPStatus != resultCode {
+		errs = append(errs, fmt.Sprintf("expected %d got %d", expectedHTTPStatus, resultCode))
+	}
+
+	// if we got an expected body, return early
+	if expectedBody != "" {
+		if string(b) != expectedBody {
+			errs = append(errs, fmt.Sprintf("expected %s got %s", expectedBody, string(b)))
+		}
+		return nil, "", errs.Combine()
+	}
+
+	resp := []*apimodel.Account{}
+	if err := json.Unmarshal(b, &resp); err != nil {
+		return nil, "", err
+	}
+
+	return resp, result.Header.Get("Link"), nil
+}
+
+func (suite *ListAccountsTestSuite) TestGetListAccountsPaginatedDefaultLimit() {
+	var (
+		expectedHTTPStatus      = 200
+		expectedBody            = ""
+		listID                  = suite.testLists["local_account_1_list_1"].ID
+		maxID                   = ""
+		minID                   = ""
+		sinceID                 = ""
+		limit              *int = nil
+	)
+
+	accounts, link, err := suite.getListAccounts(
+		expectedHTTPStatus,
+		expectedBody,
+		listID,
+		maxID,
+		sinceID,
+		minID,
+		limit,
+	)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(accounts, 2)
+	suite.Equal(
+		`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=40&max_id=01H0G89MWVQE0M58VD2HQYMQWH>; rel="next", `+
+			`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=40&min_id=01H0G8FFM1AGQDRNGBGGX8CYJQ>; rel="prev"`,
+		link,
+	)
+}
+
+func (suite *ListAccountsTestSuite) TestGetListAccountsPaginatedNextPage() {
+	var (
+		expectedHTTPStatus      = 200
+		expectedBody            = ""
+		listID                  = suite.testLists["local_account_1_list_1"].ID
+		maxID                   = ""
+		minID                   = ""
+		sinceID                 = ""
+		limit              *int = func() *int { l := 1; return &l }() // Set to 1.
+	)
+
+	// First response, ask for 1 account.
+	accounts, link, err := suite.getListAccounts(
+		expectedHTTPStatus,
+		expectedBody,
+		listID,
+		maxID,
+		sinceID,
+		minID,
+		limit,
+	)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(accounts, 1)
+	suite.Equal(
+		`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=1&max_id=01H0G8FFM1AGQDRNGBGGX8CYJQ>; rel="next", `+
+			`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=1&min_id=01H0G8FFM1AGQDRNGBGGX8CYJQ>; rel="prev"`,
+		link,
+	)
+
+	// Next response, ask for next 1 account.
+	maxID = "01H0G8FFM1AGQDRNGBGGX8CYJQ"
+	accounts, link, err = suite.getListAccounts(
+		expectedHTTPStatus,
+		expectedBody,
+		listID,
+		maxID,
+		sinceID,
+		minID,
+		limit,
+	)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(accounts, 1)
+	suite.Equal(
+		`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=1&max_id=01H0G89MWVQE0M58VD2HQYMQWH>; rel="next", `+
+			`<http://localhost:8080/api/v1/lists/01H0G8E4Q2J3FE3JDWJVWEDCD1/accounts?limit=1&min_id=01H0G89MWVQE0M58VD2HQYMQWH>; rel="prev"`,
+		link,
+	)
+}
+
+func (suite *ListAccountsTestSuite) TestGetListAccountsUnpaginated() {
+	var (
+		expectedHTTPStatus      = 200
+		expectedBody            = ""
+		listID                  = suite.testLists["local_account_1_list_1"].ID
+		maxID                   = ""
+		minID                   = ""
+		sinceID                 = ""
+		limit              *int = func() *int { l := 0; return &l }() // Set to 0 explicitly.
+	)
+
+	accounts, link, err := suite.getListAccounts(
+		expectedHTTPStatus,
+		expectedBody,
+		listID,
+		maxID,
+		sinceID,
+		minID,
+		limit,
+	)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(accounts, 2)
+	suite.Empty(link)
+}
+
+func TestListAccountsTestSuite(t *testing.T) {
+	suite.Run(t, new(ListAccountsTestSuite))
+}

internal/api/client/lists/lists_test.go

@@ -0,0 +1,108 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package lists_test
+
+import (
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/lists"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/email"
+	"github.com/superseriousbusiness/gotosocial/internal/federation"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+	"github.com/superseriousbusiness/gotosocial/internal/processing"
+	"github.com/superseriousbusiness/gotosocial/internal/state"
+	"github.com/superseriousbusiness/gotosocial/internal/storage"
+	"github.com/superseriousbusiness/gotosocial/internal/visibility"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type ListsStandardTestSuite struct {
+	// standard suite interfaces
+	suite.Suite
+	db           db.DB
+	storage      *storage.Driver
+	mediaManager *media.Manager
+	federator    federation.Federator
+	processor    *processing.Processor
+	emailSender  email.Sender
+	state        state.State
+
+	// standard suite models
+	testTokens          map[string]*gtsmodel.Token
+	testClients         map[string]*gtsmodel.Client
+	testApplications    map[string]*gtsmodel.Application
+	testUsers           map[string]*gtsmodel.User
+	testAccounts        map[string]*gtsmodel.Account
+	testAttachments     map[string]*gtsmodel.MediaAttachment
+	testStatuses        map[string]*gtsmodel.Status
+	testEmojis          map[string]*gtsmodel.Emoji
+	testEmojiCategories map[string]*gtsmodel.EmojiCategory
+	testLists           map[string]*gtsmodel.List
+
+	// module being tested
+	listsModule *lists.Module
+}
+
+func (suite *ListsStandardTestSuite) SetupSuite() {
+	suite.testTokens = testrig.NewTestTokens()
+	suite.testClients = testrig.NewTestClients()
+	suite.testApplications = testrig.NewTestApplications()
+	suite.testUsers = testrig.NewTestUsers()
+	suite.testAccounts = testrig.NewTestAccounts()
+	suite.testAttachments = testrig.NewTestAttachments()
+	suite.testStatuses = testrig.NewTestStatuses()
+	suite.testEmojis = testrig.NewTestEmojis()
+	suite.testEmojiCategories = testrig.NewTestEmojiCategories()
+	suite.testLists = testrig.NewTestLists()
+}
+
+func (suite *ListsStandardTestSuite) SetupTest() {
+	suite.state.Caches.Init()
+	suite.state.Caches.Start()
+	testrig.StartWorkers(&suite.state)
+
+	testrig.InitTestConfig()
+	testrig.InitTestLog()
+
+	suite.db = testrig.NewTestDB(&suite.state)
+	suite.state.DB = suite.db
+	suite.storage = testrig.NewInMemoryStorage()
+	suite.state.Storage = suite.storage
+
+	testrig.StartTimelines(
+		&suite.state,
+		visibility.NewFilter(&suite.state),
+		testrig.NewTestTypeConverter(suite.db),
+	)
+
+	suite.mediaManager = testrig.NewTestMediaManager(&suite.state)
+	suite.federator = testrig.NewTestFederator(&suite.state, testrig.NewTestTransportController(&suite.state, testrig.NewMockHTTPClient(nil, "../../../../testrig/media")), suite.mediaManager)
+	suite.emailSender = testrig.NewEmailSender("../../../../web/template/", nil)
+	suite.processor = testrig.NewTestProcessor(&suite.state, suite.federator, suite.emailSender, suite.mediaManager)
+	suite.listsModule = lists.New(suite.processor)
+
+	testrig.StandardDBSetup(suite.db, nil)
+	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
+}
+
+func (suite *ListsStandardTestSuite) TearDownTest() {
+	testrig.StandardDBTeardown(suite.db)
+	testrig.StandardStorageTeardown(suite.storage)
+	testrig.StopWorkers(&suite.state)
+}

internal/api/util/parsequery.go

@@ -31,6 +31,7 @@
 	LimitKey   = "limit"
 	LocalKey   = "local"
 	MaxIDKey   = "max_id"
+	SinceIDKey = "since_id"
 	MinIDKey   = "min_id"
 
 	/* Search keys */
@@ -76,10 +77,8 @@ func ParseLimit(value string, defaultValue int, max, min int) (int, gtserror.Wit
 	i, err := parseInt(value, defaultValue, max, min, LimitKey)
 	if err != nil {
 		return 0, err
-	} else if i == 0 {
-		// treat 0 as an empty query
-		return defaultValue, nil
 	}
+
 	return i, nil
 }
 

internal/processing/list/get.go

@@ -75,6 +75,46 @@ func (p *Processor) GetAll(ctx context.Context, account *gtsmodel.Account) ([]*a
 	return apiLists, nil
 }
 
+// GetAllListAccounts returns all accounts that are in the given list,
+// owned by the given account. There's no pagination for this endpoint.
+//
+// See https://docs.joinmastodon.org/methods/lists/#query-parameters:
+//
+//	Limit: Integer. Maximum number of results. Defaults to 40 accounts.
+//	Max 80 accounts. Set to 0 in order to get all accounts without pagination.
+func (p *Processor) GetAllListAccounts(
+	ctx context.Context,
+	account *gtsmodel.Account,
+	listID string,
+) ([]*apimodel.Account, gtserror.WithCode) {
+	// Ensure list exists + is owned by requesting account.
+	_, errWithCode := p.getList(
+		// Use barebones ctx; no embedded
+		// structs necessary for this call.
+		gtscontext.SetBarebones(ctx),
+		account.ID,
+		listID,
+	)
+	if errWithCode != nil {
+		return nil, errWithCode
+	}
+
+	// Get all entries for this list.
+	listEntries, err := p.state.DB.GetListEntries(ctx, listID, "", "", "", 0)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		err = gtserror.Newf("error getting list entries: %w", err)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// Extract accounts from list entries + add them to response.
+	accounts := make([]*apimodel.Account, 0, len(listEntries))
+	p.accountsFromListEntries(ctx, listEntries, func(acc *apimodel.Account) {
+		accounts = append(accounts, acc)
+	})
+
+	return accounts, nil
+}
+
 // GetListAccounts returns accounts that are in the given list, owned by the given account.
 // The additional parameters can be used for paging.
 func (p *Processor) GetListAccounts(
@@ -121,6 +161,25 @@ func (p *Processor) GetListAccounts(
 		prevMinIDValue = listEntries[0].ID
 	)
 
+	// Extract accounts from list entries + add them to response.
+	p.accountsFromListEntries(ctx, listEntries, func(acc *apimodel.Account) {
+		items = append(items, acc)
+	})
+
+	return util.PackagePageableResponse(util.PageableResponseParams{
+		Items:          items,
+		Path:           "/api/v1/lists/" + listID + "/accounts",
+		NextMaxIDValue: nextMaxIDValue,
+		PrevMinIDValue: prevMinIDValue,
+		Limit:          limit,
+	})
+}
+
+func (p *Processor) accountsFromListEntries(
+	ctx context.Context,
+	listEntries []*gtsmodel.ListEntry,
+	appendAcc func(*apimodel.Account),
+) {
 	// For each list entry, we want the account it points to.
 	// To get this, we need to first get the follow that the
 	// list entry pertains to, then extract the target account
@@ -144,14 +203,6 @@ func (p *Processor) GetListAccounts(
 			continue
 		}
 
-		items = append(items, apiAccount)
+		appendAcc(apiAccount)
 	}
-
-	return util.PackagePageableResponse(util.PageableResponseParams{
-		Items:          items,
-		Path:           "/api/v1/lists/" + listID + "/accounts",
-		NextMaxIDValue: nextMaxIDValue,
-		PrevMinIDValue: prevMinIDValue,
-		Limit:          limit,
-	})
 }