[wip]: starting to work on the runner application

README.md

@@ -0,0 +1,25 @@
+# QBitRun
+
+Runner application for qBittorrent.
+
+---
+
+# Anything Below This Line is not ready!!
+
+---
+
+## Quick Start
+
+Start by copying the following command into the "Run external program on torrent completion" field in qBittorrent `Settings > Downloads`.
+
+```sh
+/path/to/qbitrun handle -N "%N" -L "%L" -G "%G" -F "%F" -R "%R" -D "%D" -C "%C" -Z "%Z" -T "%T" -I "%I" -J "%J" -K "%K"
+```
+
+If wanting to handle "Run external program on torrent torrent added", add `--add-event` (or `-a` for short) to the command. This is for the qbitrun and you to be able to distinguish whether this run is triggered by "torrent added" event.
+
+```sh
+/path/to/qbitrun handle --add-event -N "%N" -L "%L" -G "%G" -F "%F" -R "%R" -D "%D" -C "%C" -Z "%Z" -T "%T" -I "%I" -J "%J" -K "%K"
+```
+
+You can filter out which events to handle later in the runner .yaml files.

cmd/qbitrun/cli/handle.go

@@ -1,24 +1,11 @@
 package cli
 
-import "github.com/spf13/cobra"
+import (
+	"github.com/spf13/cobra"
+	"github.com/tigorlazuardi/qbitrun/lib/qbitrun"
+)
 
-type handleArgsS struct {
-	torrentName    string
-	category       string
-	tags           []string
-	contentPath    string
-	rootPath       string
-	savePath       string
-	numberOfFiles  int
-	torrentSize    uint64
-	currentTracker string
-	infoHashV1     string
-	infoHashV2     string
-	torrentID      string
-	addEvent       bool
-}
-
-var handleArgs = handleArgsS{}
+var handleArgs = qbitrun.RunnerContext{}
 
 var handleCmd = &cobra.Command{
 	Use:   "handle",
@@ -30,43 +17,43 @@ var handleCmd = &cobra.Command{
 func init() {
 	flags := handleCmd.Flags()
 
-	flags.BoolVarP(&handleArgs.addEvent, "add-event", "a", false, "mark this event as add torrent event")
+	flags.BoolVarP(&handleArgs.AddEvent, "add-event", "a", false, "mark this event as add torrent event")
 
-	flags.StringVarP(&handleArgs.torrentName, "torrent-name", "N", "", "Torrent Name")
-	handleCmd.MarkFlagRequired("torrent-name")
+	flags.StringVarP(&handleArgs.TorrentName, "torrent-name", "N", "", "Torrent Name")
+	_ = handleCmd.MarkFlagRequired("torrent-name")
 
-	flags.StringVarP(&handleArgs.category, "category", "L", "", "Category")
-	handleCmd.MarkFlagRequired("category")
+	flags.StringVarP(&handleArgs.Category, "category", "L", "", "Category")
+	_ = handleCmd.MarkFlagRequired("category")
 
-	flags.StringSliceVarP(&handleArgs.tags, "tags", "G", []string{}, "Tags (seperated by comma)")
-	handleCmd.MarkFlagRequired("tags")
+	flags.StringSliceVarP(&handleArgs.Tags, "tags", "G", []string{}, "Tags (seperated by comma)")
+	_ = handleCmd.MarkFlagRequired("tags")
 
-	flags.StringVarP(&handleArgs.contentPath, "content-path", "F", "", "Content Path (same as root path for multifile torrent")
-	handleCmd.MarkFlagRequired("content-path")
+	flags.StringVarP(&handleArgs.ContentPath, "content-path", "F", "", "Content Path (same as root path for multifile torrent)")
+	_ = handleCmd.MarkFlagRequired("content-path")
 
-	flags.StringVarP(&handleArgs.rootPath, "root-path", "R", "", "Root path (first torrent subdirectory path)")
-	handleCmd.MarkFlagRequired("root-path")
+	flags.StringVarP(&handleArgs.RootPath, "root-path", "R", "", "Root path (first torrent subdirectory path)")
+	_ = handleCmd.MarkFlagRequired("root-path")
 
-	flags.StringVarP(&handleArgs.savePath, "save-path", "D", "", "Save path")
-	handleCmd.MarkFlagRequired("save-path")
+	flags.StringVarP(&handleArgs.SavePath, "save-path", "D", "", "Save path")
+	_ = handleCmd.MarkFlagRequired("save-path")
 
-	flags.IntVarP(&handleArgs.numberOfFiles, "number-of-files", "C", 0, "Number of files")
-	handleCmd.MarkFlagRequired("number-of-files")
+	flags.IntVarP(&handleArgs.NumberOfFiles, "number-of-files", "C", 0, "Number of files")
+	_ = handleCmd.MarkFlagRequired("number-of-files")
 
-	flags.Uint64VarP(&handleArgs.torrentSize, "torrent-size", "Z", 0, "Torrent size")
-	handleCmd.MarkFlagRequired("torrent-size")
+	flags.Uint64VarP(&handleArgs.TorrentSize, "torrent-size", "Z", 0, "Torrent size")
+	_ = handleCmd.MarkFlagRequired("torrent-size")
 
-	flags.StringVarP(&handleArgs.currentTracker, "current-tracker", "T", "", "Current tracker")
-	handleCmd.MarkFlagRequired("current-tracker")
+	flags.StringVarP(&handleArgs.CurrentTracker, "current-tracker", "T", "", "Current tracker")
+	_ = handleCmd.MarkFlagRequired("current-tracker")
 
-	flags.StringVarP(&handleArgs.infoHashV1, "info-hash-v1", "I", "", "Info hash v1")
-	handleCmd.MarkFlagRequired("info-hash-v1")
+	flags.StringVarP(&handleArgs.InfoHashV1, "info-hash-v1", "I", "", "Info hash v1")
+	_ = handleCmd.MarkFlagRequired("info-hash-v1")
 
-	flags.StringVarP(&handleArgs.infoHashV2, "info-hash-v2", "J", "", "Info hash v2")
-	handleCmd.MarkFlagRequired("info-hash-v2")
+	flags.StringVarP(&handleArgs.InfoHashV2, "info-hash-v2", "J", "", "Info hash v2")
+	_ = handleCmd.MarkFlagRequired("info-hash-v2")
 
-	flags.StringVarP(&handleArgs.torrentID, "torrent-id", "K", "", "Torrent ID")
-	handleCmd.MarkFlagRequired("torrent-id")
+	flags.StringVarP(&handleArgs.TorrentID, "torrent-id", "K", "", "Torrent ID")
+	_ = handleCmd.MarkFlagRequired("torrent-id")
 
 	RootCmd.AddCommand(handleCmd)
 }

go.mod

@@ -3,7 +3,11 @@ module github.com/tigorlazuardi/qbitrun
 go 1.22.3
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spf13/cobra v1.8.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,10 +1,17 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
 github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

lib/qbitrun/qbitrun.go

@@ -0,0 +1,37 @@
+package qbitrun
+
+type QBitRun struct {
+	context  RunnerContext
+	workflow WorkflowDir
+}
+
+// New creates a QBitRun instance intended for single session.
+//
+// QBitRun assumes ownership of the WorkflowDir and will close all files
+// when the session is done.
+//
+// Users must not use or modify the []io.ReadCloser in the WorkflowDir after
+// calling this function, especially if the WorkflowDir is created using
+// WorkflowFromReadClosers or WorkflowFromReaders.
+func New(workflows WorkflowDir, ctx RunnerContext) *QBitRun {
+	return &QBitRun{
+		context:  ctx,
+		workflow: workflows,
+	}
+}
+
+type RunnerContext struct {
+	TorrentName    string
+	Category       string
+	Tags           []string
+	ContentPath    string
+	RootPath       string
+	SavePath       string
+	NumberOfFiles  int
+	TorrentSize    uint64
+	CurrentTracker string
+	InfoHashV1     string
+	InfoHashV2     string
+	TorrentID      string
+	AddEvent       bool
+}

lib/qbitrun/workflow.go

@@ -0,0 +1,74 @@
+package qbitrun
+
+import (
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+)
+
+type WorkflowDir interface {
+	Files() []io.ReadCloser
+}
+
+type workflowFiles []io.ReadCloser
+
+func (wf workflowFiles) Files() []io.ReadCloser {
+	return wf
+}
+
+// OpenDir opens a directory and returns a WorkflowDir.
+//
+// Set filter to filter out unwanted files.
+func OpenDir(dir string, filters ...func(path string, d fs.FileInfo) bool) (WorkflowDir, error) {
+	var files []io.ReadCloser
+	err := filepath.Walk(dir, func(path string, info fs.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+		ok := true
+		for _, filter := range filters {
+			ok = filter(path, info)
+			if !ok {
+				break
+			}
+		}
+		if ok {
+			file, err := os.Open(path)
+			if err != nil {
+				return err
+			}
+			files = append(files, file)
+		}
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return workflowFiles(files), nil
+}
+
+// WorkflowFromReadClosers creates a WorkflowDir from a list of io.ReadCloser.
+func WorkflowFromReadClosers(rcs ...io.ReadCloser) WorkflowDir {
+	return workflowFiles(rcs)
+}
+
+// WorkflowFromReaders creates a WorkflowDir from a list of io.Reader.
+//
+// If the Reader implements io.ReadCloser, it will be used as is.
+// If not, it will be wrapped with io.NopCloser.
+func WorkflowFromReaders(readers ...io.Reader) WorkflowDir {
+	var rcs []io.ReadCloser
+	for _, r := range readers {
+		if rc, ok := r.(io.ReadCloser); ok {
+			rcs = append(rcs, rc)
+		} else {
+			rcs = append(rcs, io.NopCloser(r))
+		}
+	}
+	return workflowFiles(rcs)
+}

lib/workflow/job.go

@@ -0,0 +1,59 @@
+package workflow
+
+import (
+	"fmt"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Job struct {
+	After []string `yaml:"after"`
+	Steps []Step   `yaml:"steps"`
+	// Error is the action taken when a step fails.
+	Error ErrorAction `yaml:"error"`
+}
+
+type ErrorAction string
+
+func (ea *ErrorAction) UnmarshalYAML(value *yaml.Node) error {
+	if value.IsZero() {
+		*ea = ErrorActionStopJob
+		return nil
+	}
+	var s string
+	if err := value.Decode(&s); err != nil {
+		return err
+	}
+	trimmed := strings.TrimSpace(s)
+	lowered := strings.ToLower(trimmed)
+	switch lowered {
+	case "continue":
+		*ea = ErrorActionContinue
+	case "stop-job":
+		*ea = ErrorActionStopJob
+	case "stop-action":
+		*ea = ErrorActionStopAction
+	case "stop-run":
+		*ea = ErrorActionStopRun
+	default:
+		return &yaml.TypeError{
+			Errors: []string{fmt.Sprintf("invalid job error action: %q", trimmed)},
+		}
+	}
+	return nil
+}
+
+func (ea ErrorAction) String() string {
+	if ea == ErrorActionStopJob {
+		return "stop-job"
+	}
+	return string(ea)
+}
+
+const (
+	ErrorActionStopJob    ErrorAction = "" // default case
+	ErrorActionContinue   ErrorAction = "continue"
+	ErrorActionStopAction ErrorAction = "stop-action"
+	ErrorActionStopRun    ErrorAction = "stop-run"
+)

lib/workflow/job_test.go

@@ -0,0 +1,70 @@
+package workflow
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+)
+
+func TestErrorAction_UnmarshalYAML(t *testing.T) {
+	tests := []struct {
+		name  string
+		input []byte
+		want  ErrorAction
+	}{
+		{
+			name:  "continue",
+			input: []byte(`E: ConTinue`),
+			want:  ErrorActionContinue,
+		},
+		{
+			name:  "stop-job",
+			input: []byte(`E: stop-job`),
+			want:  ErrorActionStopJob,
+		},
+		{
+			name:  "stop-job",
+			input: []byte(`E: stop-job`),
+			want:  ErrorActionStopJob,
+		},
+		{
+			name:  "null is stop-job",
+			input: []byte(`E: null`),
+			want:  ErrorActionStopJob,
+		},
+		{
+			name:  "unset is stop-job",
+			input: []byte(`E: `),
+			want:  ErrorActionStopJob,
+		},
+		{
+			name:  "unset is stop-job 2",
+			input: []byte(`foo: bar`),
+			want:  ErrorActionStopJob,
+		},
+		{
+			name:  "stop-action",
+			input: []byte(`E: stop-action`),
+			want:  ErrorActionStopAction,
+		},
+		{
+			name:  "stop-run",
+			input: []byte(`E: stop-run`),
+			want:  ErrorActionStopRun,
+		},
+	}
+	type placeholder struct {
+		E ErrorAction `yaml:"E"`
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var placeholder placeholder
+			err := yaml.Unmarshal(tt.input, &placeholder)
+			if !assert.NoError(t, err) {
+				return
+			}
+			assert.Equal(t, tt.want, placeholder.E)
+		})
+	}
+}

lib/workflow/sequence.go

@@ -0,0 +1,31 @@
+package workflow
+
+import (
+	"sync"
+	"time"
+)
+
+// Sequencer handles sequencing of jobs.
+//
+// It handles the Lifecycle of a Workflow.
+//
+// When Jobs have no dependencies (defined via After), they are run in parallel.
+//
+// Sequencer's instance job is to keep track of the order of Jobs and Steps. NOT RUNNING THEM.
+//
+// Sequencer is thread-safe.
+type Sequencer struct {
+	queued   Jobs
+	finished Jobs
+
+	reports []SequenceReport
+
+	mu sync.Mutex
+}
+
+type SequenceReport struct {
+	started time.Time
+	end     time.Time
+	job     Job
+	err     error
+}

lib/workflow/workflow.go

@@ -0,0 +1,15 @@
+package workflow
+
+type Workflow struct {
+	Name     string `yaml:"name"`
+	Disabled bool   `yaml:"disabled"`
+	When     string `yaml:"when"`
+	Jobs     Jobs   `yaml:"jobs"`
+}
+
+type Jobs map[string]Job
+
+type Step struct {
+	Name string `yaml:"name"`
+	Run  string `yaml:"run"`
+}