[chore] Tidy up some of the search logic (#1082)v0.6.0-rc1

* start refactoring some of the search + deref logic

* add tests for search api

* rename GetRemoteAccount + GetRemoteStatus

* make search function a bit simpler + clearer

* fix little fucky wucky uwu owo i'm just a little guy

* update faulty switch statements

* update test to use storage struct

* redo switches for clarity

* reduce repeated logic in search tests

* fastfail getstatus by uri

* debug log + trace log better

* add implementation note

* return early if no result for namestring search

* return + check on dereferencing error types

* errors hah what errors

* remove unneeded error type alias, add custom error text during stringification itself

* fix a woops recursion :see_no_evil:

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: kim <grufwub@gmail.com>

2 files changed, 355 insertions, 0 deletions

diff --git a/internal/api/client/search/search_test.go b/internal/api/client/search/search_test.go
new file mode 100644
index 000000000..11b5b80b2
--- /dev/null
+++ b/internal/api/client/search/search_test.go
@@ -0,0 +1,115 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   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 search_test
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/search"
+	"github.com/superseriousbusiness/gotosocial/internal/concurrency"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"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/messages"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+	"github.com/superseriousbusiness/gotosocial/internal/processing"
+	"github.com/superseriousbusiness/gotosocial/internal/storage"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type SearchStandardTestSuite struct {
+	// standard suite interfaces
+	suite.Suite
+	db           db.DB
+	storage      *storage.Driver
+	mediaManager media.Manager
+	federator    federation.Federator
+	processor    processing.Processor
+	emailSender  email.Sender
+	sentEmails   map[string]string
+
+	// 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
+
+	// module being tested
+	searchModule *search.Module
+}
+
+func (suite *SearchStandardTestSuite) SetupSuite() {
+	suite.testTokens = testrig.NewTestTokens()
+	suite.testClients = testrig.NewTestClients()
+	suite.testApplications = testrig.NewTestApplications()
+	suite.testUsers = testrig.NewTestUsers()
+	suite.testAccounts = testrig.NewTestAccounts()
+}
+
+func (suite *SearchStandardTestSuite) SetupTest() {
+	testrig.InitTestConfig()
+	testrig.InitTestLog()
+
+	fedWorker := concurrency.NewWorkerPool[messages.FromFederator](-1, -1)
+	clientWorker := concurrency.NewWorkerPool[messages.FromClientAPI](-1, -1)
+
+	suite.db = testrig.NewTestDB()
+	suite.storage = testrig.NewInMemoryStorage()
+	suite.mediaManager = testrig.NewTestMediaManager(suite.db, suite.storage)
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil, "../../../../testrig/media"), suite.db, fedWorker), suite.storage, suite.mediaManager, fedWorker)
+	suite.sentEmails = make(map[string]string)
+	suite.emailSender = testrig.NewEmailSender("../../../../web/template/", suite.sentEmails)
+	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator, suite.emailSender, suite.mediaManager, clientWorker, fedWorker)
+	suite.searchModule = search.New(suite.processor).(*search.Module)
+	testrig.StandardDBSetup(suite.db, nil)
+	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
+
+	suite.NoError(suite.processor.Start())
+}
+
+func (suite *SearchStandardTestSuite) TearDownTest() {
+	testrig.StandardDBTeardown(suite.db)
+	testrig.StandardStorageTeardown(suite.storage)
+}
+
+func (suite *SearchStandardTestSuite) newContext(recorder *httptest.ResponseRecorder, requestPath string) *gin.Context {
+	ctx, _ := testrig.CreateGinTestContext(recorder, nil)
+	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"])
+
+	protocol := config.GetProtocol()
+	host := config.GetHost()
+
+	baseURI := fmt.Sprintf("%s://%s", protocol, host)
+	requestURI := fmt.Sprintf("%s/%s", baseURI, requestPath)
+
+	ctx.Request = httptest.NewRequest(http.MethodGet, requestURI, nil) // the endpoint we're hitting
+	ctx.Request.Header.Set("accept", "application/json")
+	return ctx
+}
diff --git a/internal/api/client/search/searchget_test.go b/internal/api/client/search/searchget_test.go
new file mode 100644
index 000000000..bcbe83baf
--- /dev/null
+++ b/internal/api/client/search/searchget_test.go
@@ -0,0 +1,240 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   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 search_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/search"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+)
+
+type SearchGetTestSuite struct {
+	SearchStandardTestSuite
+}
+
+func (suite *SearchGetTestSuite) testSearch(query string, resolve bool, expectedHTTPStatus int) (*apimodel.SearchResult, error) {
+	requestPath := fmt.Sprintf("%s?q=%s&resolve=%t", search.BasePathV1, query, resolve)
+	recorder := httptest.NewRecorder()
+
+	ctx := suite.newContext(recorder, requestPath)
+
+	suite.searchModule.SearchGETHandler(ctx)
+
+	result := recorder.Result()
+	defer result.Body.Close()
+
+	if resultCode := recorder.Code; expectedHTTPStatus != resultCode {
+		return nil, fmt.Errorf("expected %d got %d", expectedHTTPStatus, resultCode)
+	}
+
+	b, err := ioutil.ReadAll(result.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	searchResult := &apimodel.SearchResult{}
+	if err := json.Unmarshal(b, searchResult); err != nil {
+		return nil, err
+	}
+
+	return searchResult, nil
+}
+
+func (suite *SearchGetTestSuite) TestSearchRemoteAccountByURI() {
+	query := "https://unknown-instance.com/users/brand_new_person"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchRemoteAccountByNamestring() {
+	query := "@brand_new_person@unknown-instance.com"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchRemoteAccountByNamestringNoLeadingAt() {
+	query := "brand_new_person@unknown-instance.com"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchRemoteAccountByNamestringNoResolve() {
+	query := "@brand_new_person@unknown-instance.com"
+	resolve := false
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(searchResult.Accounts, 0)
+}
+
+func (suite *SearchGetTestSuite) TestSearchLocalAccountByNamestring() {
+	query := "@the_mighty_zork"
+	resolve := false
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchLocalAccountByNamestringWithDomain() {
+	query := "@the_mighty_zork@localhost:8080"
+	resolve := false
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchNonexistingLocalAccountByNamestringResolveTrue() {
+	query := "@somone_made_up@localhost:8080"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(searchResult.Accounts, 0)
+}
+
+func (suite *SearchGetTestSuite) TestSearchLocalAccountByURI() {
+	query := "http://localhost:8080/users/the_mighty_zork"
+	resolve := false
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchLocalAccountByURL() {
+	query := "http://localhost:8080/@the_mighty_zork"
+	resolve := false
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Accounts, 1) {
+		suite.FailNow("expected 1 account in search results but got 0")
+	}
+
+	gotAccount := searchResult.Accounts[0]
+	suite.NotNil(gotAccount)
+}
+
+func (suite *SearchGetTestSuite) TestSearchNonexistingLocalAccountByURL() {
+	query := "http://localhost:8080/@the_shmighty_shmork"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(searchResult.Accounts, 0)
+}
+
+func (suite *SearchGetTestSuite) TestSearchStatusByURL() {
+	query := "https://turnip.farm/users/turniplover6969/statuses/70c53e54-3146-42d5-a630-83c8b6c7c042"
+	resolve := true
+
+	searchResult, err := suite.testSearch(query, resolve, http.StatusOK)
+	if err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	if !suite.Len(searchResult.Statuses, 1) {
+		suite.FailNow("expected 1 status in search results but got 0")
+	}
+
+	gotStatus := searchResult.Statuses[0]
+	suite.NotNil(gotStatus)
+}
+
+func TestSearchGetTestSuite(t *testing.T) {
+	suite.Run(t, &SearchGetTestSuite{})
+}