Move some Actions related functions from routers to services (#33280)

Move the main logic of `generateTaskContext` and `findTaskNeeds` to the
`services` layer.

This is a part of #32751, since we need the git context and `needs` to
parse the concurrency expressions.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit d0962ce3da424f0a1df2acf595b20066d6e55128)

Conflicts:
	routers/api/actions/runner/main_test.go
	routers/api/actions/runner/utils.go
	services/actions/context_test.go
	services/actions/init_test.go
	tests/integration/actions_job_test.go
  simple conflicts related to

  ref_type":          string(refName.RefType()),                            // string, The type of ref that triggered the workflow run. Valid values are branch or tag.

  Use env GITEA_RUNNER_REGISTRATION_TOKEN as global runner token (#32946)

tests/integration/actions_job_test.go

@@ -4,22 +4,28 @@
 package integration
 
 import (
+	"context"
 	"encoding/base64"
 	"fmt"
 	"net/http"
 	"net/url"
+	"reflect"
 	"testing"
 	"time"
 
 	actions_model "code.gitea.io/gitea/models/actions"
 	auth_model "code.gitea.io/gitea/models/auth"
+	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 
 	runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestJobWithNeeds(t *testing.T) {
@@ -354,6 +360,95 @@ jobs:
 	})
 }
 
+func TestActionsGiteaContext(t *testing.T) {
+	if !setting.Database.Type.IsSQLite3() {
+		t.Skip()
+	}
+
+	onGiteaRun(t, func(t *testing.T, u *url.URL) {
+		user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+		user2Session := loginUser(t, user2.Name)
+		user2Token := getTokenForLoggedInUser(t, user2Session, auth_model.AccessTokenScopeWriteRepository, auth_model.AccessTokenScopeWriteUser)
+
+		apiBaseRepo := createActionsTestRepo(t, user2Token, "actions-gitea-context", false)
+		baseRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: apiBaseRepo.ID})
+		user2APICtx := NewAPITestContext(t, baseRepo.OwnerName, baseRepo.Name, auth_model.AccessTokenScopeWriteRepository)
+
+		runner := newMockRunner()
+		runner.registerAsRepoRunner(t, baseRepo.OwnerName, baseRepo.Name, "mock-runner", []string{"ubuntu-latest"})
+
+		// init the workflow
+		wfTreePath := ".gitea/workflows/pull.yml"
+		wfFileContent := `name: Pull Request
+on: pull_request
+jobs:
+  wf1-job:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo 'test the pull'
+`
+		opts := getWorkflowCreateFileOptions(user2, baseRepo.DefaultBranch, fmt.Sprintf("create %s", wfTreePath), wfFileContent)
+		createWorkflowFile(t, user2Token, baseRepo.OwnerName, baseRepo.Name, wfTreePath, opts)
+		// user2 creates a pull request
+		doAPICreateFile(user2APICtx, "user2-patch.txt", &api.CreateFileOptions{
+			FileOptions: api.FileOptions{
+				NewBranchName: "user2/patch-1",
+				Message:       "create user2-patch.txt",
+				Author: api.Identity{
+					Name:  user2.Name,
+					Email: user2.Email,
+				},
+				Committer: api.Identity{
+					Name:  user2.Name,
+					Email: user2.Email,
+				},
+				Dates: api.CommitDateOptions{
+					Author:    time.Now(),
+					Committer: time.Now(),
+				},
+			},
+			ContentBase64: base64.StdEncoding.EncodeToString([]byte("user2-fix")),
+		})(t)
+		apiPull, err := doAPICreatePullRequest(user2APICtx, baseRepo.OwnerName, baseRepo.Name, baseRepo.DefaultBranch, "user2/patch-1")(t)
+		require.NoError(t, err)
+		task := runner.fetchTask(t)
+		gtCtx := task.Context.GetFields()
+		actionTask := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionTask{ID: task.Id})
+		actionRunJob := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunJob{ID: actionTask.JobID})
+		actionRun := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRun{ID: actionRunJob.RunID})
+		require.NoError(t, actionRun.LoadAttributes(context.Background()))
+
+		assert.Equal(t, user2.Name, gtCtx["actor"].GetStringValue())
+		assert.Equal(t, setting.AppURL+"api/v1", gtCtx["api_url"].GetStringValue())
+		assert.Equal(t, apiPull.Base.Ref, gtCtx["base_ref"].GetStringValue())
+		runEvent := map[string]any{}
+		require.NoError(t, json.Unmarshal([]byte(actionRun.EventPayload), &runEvent))
+		assert.True(t, reflect.DeepEqual(gtCtx["event"].GetStructValue().AsMap(), runEvent))
+		assert.Equal(t, actionRun.TriggerEvent, gtCtx["event_name"].GetStringValue())
+		assert.Equal(t, apiPull.Head.Ref, gtCtx["head_ref"].GetStringValue())
+		assert.Equal(t, actionRunJob.JobID, gtCtx["job"].GetStringValue())
+		assert.Equal(t, actionRun.Ref, gtCtx["ref"].GetStringValue())
+		assert.Equal(t, (git.RefName(actionRun.Ref)).ShortName(), gtCtx["ref_name"].GetStringValue())
+		assert.False(t, gtCtx["ref_protected"].GetBoolValue())
+		assert.Equal(t, (git.RefName(actionRun.Ref)).RefType(), gtCtx["ref_type"].GetStringValue())
+		assert.Equal(t, actionRun.Repo.OwnerName+"/"+actionRun.Repo.Name, gtCtx["repository"].GetStringValue())
+		assert.Equal(t, actionRun.Repo.OwnerName, gtCtx["repository_owner"].GetStringValue())
+		assert.Equal(t, actionRun.Repo.HTMLURL(), gtCtx["repositoryUrl"].GetStringValue())
+		assert.Equal(t, fmt.Sprint(actionRunJob.RunID), gtCtx["run_id"].GetStringValue())
+		assert.Equal(t, fmt.Sprint(actionRun.Index), gtCtx["run_number"].GetStringValue())
+		assert.Equal(t, fmt.Sprint(actionRunJob.Attempt), gtCtx["run_attempt"].GetStringValue())
+		assert.Equal(t, "Actions", gtCtx["secret_source"].GetStringValue())
+		assert.Equal(t, setting.AppURL, gtCtx["server_url"].GetStringValue())
+		assert.Equal(t, actionRun.CommitSHA, gtCtx["sha"].GetStringValue())
+		assert.Equal(t, actionRun.WorkflowID, gtCtx["workflow"].GetStringValue())
+		assert.Equal(t, setting.Actions.DefaultActionsURL.URL(), gtCtx["gitea_default_actions_url"].GetStringValue())
+		token := gtCtx["token"].GetStringValue()
+		assert.Equal(t, actionTask.TokenLastEight, token[len(token)-8:])
+
+		doAPIDeleteRepository(user2APICtx)(t)
+	})
+}
+
 func createActionsTestRepo(t *testing.T, authToken, repoName string, isPrivate bool) *api.Repository {
 	req := NewRequestWithJSON(t, "POST", "/api/v1/user/repos", &api.CreateRepoOption{
 		Name:          repoName,