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workflow.go
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workflow.go
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package workflow
import (
"fmt"
"io/ioutil"
"log"
"math"
"reflect"
"strconv"
"github.com/ankursoni/kubernetes-operator-roiergasias/pkg/lib"
"github.com/ankursoni/kubernetes-operator-roiergasias/pkg/tasks"
"go.uber.org/zap"
"gopkg.in/yaml.v3"
)
type IWorkflows interface {
NewWorkflow(string) (*Workflow, error)
NewWorkflowFromText(string) (*Workflow, error)
}
type Workflows struct {
Tasks tasks.ITasks
Logger *zap.Logger
}
func NewWorkflows(t tasks.ITasks, logger *zap.Logger) (workflows IWorkflows) {
if logger == nil {
newLogger, err := lib.NewZapLogger(false)
if err != nil {
log.Fatalln(fmt.Errorf("error creating new zap logger: %w", err))
return
} else {
logger = newLogger
}
}
logger.Debug("creating new workflows using dependencies", zap.Any("ITasks", t))
if t == nil {
workflows = &Workflows{Tasks: tasks.NewTasks(logger), Logger: logger}
} else {
workflows = &Workflows{Tasks: t, Logger: logger}
}
logger.Debug("successfully created new workflows", zap.Any("Workflows", workflows))
return
}
func (w *Workflows) NewWorkflow(filePath string) (workflow *Workflow, err error) {
logger := w.Logger
logger.Debug("reading yaml file", zap.String("path", filePath))
bytes, readErr := ioutil.ReadFile(filePath)
if readErr != nil {
err = fmt.Errorf("error reading yaml file: %w", readErr)
logger.Error(err.Error(), zap.Error(err))
return
}
return w.NewWorkflowFromText(string(bytes))
}
func (w *Workflows) NewWorkflowFromText(text string) (workflow *Workflow, err error) {
logger := w.Logger
logger.Debug("parsing yaml text to workflow", zap.String("path", text))
parseErr := yaml.Unmarshal([]byte(text), &workflow)
if parseErr != nil {
err = fmt.Errorf("error parsing yaml text: %w", parseErr)
logger.Error(err.Error(), zap.Error(err))
return
}
workflow.Tasks = w.Tasks
workflow.Logger = w.Logger
logger.Debug("successfully parsed yaml text to workflow", zap.Any("workflow", workflow))
return
}
type Workflow struct {
Version string `yaml:"version,omitempty"`
EnvironmentList []map[string]string `yaml:"environment,omitempty"`
TaskList []map[string]interface{} `yaml:"task,omitempty"`
Node string `yaml:",omitempty"`
Tasks tasks.ITasks `yaml:",omitempty"`
Logger *zap.Logger `yaml:",omitempty"`
}
func (w *Workflow) Run() (err error) {
logger := w.Logger
if validationErr := w.Validate(); validationErr != nil {
err = validationErr
return
}
if len(w.EnvironmentList) > 0 {
logger.Debug("setting up workflow environment", zap.Any("environment list", w.EnvironmentList))
for i := range w.EnvironmentList {
environmentMap := lib.ResolveEnvironmentVariablesInMap(w.EnvironmentList[i])
if environmentErr := lib.SetEnvironmentVariables(environmentMap); environmentErr != nil {
err = fmt.Errorf("error setting up workflow environment: %w", err)
logger.Error(err.Error(), zap.Error(err))
return
}
}
logger.Debug("successfully set up workflow environment")
}
logger.Debug("setting up workflow tasks, steps and then run", zap.Any("task list", w.TaskList))
for _, taskData := range w.TaskList {
var node string
var taskType string
var stepList []interface{}
for j := range taskData {
switch j {
case string(lib.NodeAttribute):
node = taskData[j].(string)
default:
taskType = j
stepList = taskData[j].([]interface{})
}
}
for k := range stepList {
step := stepList[k].(map[string]interface{})
task := w.Tasks.NewTask(taskType, step, node)
if task == nil {
err = fmt.Errorf("error creating new task type")
logger.Error(err.Error(), zap.Error(err))
return
}
if runErr := task.Run(); runErr != nil {
err = fmt.Errorf("error running task: %w", runErr)
logger.Error(err.Error(), zap.Error(err))
return
}
}
}
logger.Debug("successfully set up workflow tasks, steps and then ran")
return
}
func (w *Workflow) Validate() (err error) {
logger := w.Logger
logger.Debug("validating workflow", zap.Any("workflow", w))
if version, verErr := strconv.ParseFloat(w.Version, 32); verErr != nil || math.Round(version*10)/10 != 0.1 {
err = fmt.Errorf("validation error: invalid version or unsupported version (not 0.1)")
logger.Error(err.Error(), zap.Error(err))
return
}
if len(w.TaskList) == 0 {
err = fmt.Errorf("validation error: no task list found")
logger.Error(err.Error(), zap.Error(err))
return
}
for i, taskData := range w.TaskList {
var taskType string
var stepList []interface{}
for j := range taskData {
switch j {
case string(lib.NodeAttribute):
case string(lib.SequentialTaskType):
if reflect.TypeOf(taskData[j]) != reflect.TypeOf([]interface{}{}) {
err = fmt.Errorf("validation error: invalid step list in task type %s in task number %d",
j, i+1)
logger.Error(err.Error(), zap.Error(err))
return
}
taskType = j
stepList = taskData[j].([]interface{})
default:
err = fmt.Errorf("validation error: invalid task type %s in task number %d", j, i)
logger.Error(err.Error(), zap.Error(err))
return
}
}
for k := range stepList {
if reflect.TypeOf(stepList[k]) != reflect.TypeOf(map[string]interface{}{}) {
err = fmt.Errorf("validation error: invalid step in task type %s in task number %d",
taskType, i+1)
logger.Error(err.Error(), zap.Error(err))
return
}
step := stepList[k].(map[string]interface{})
for l := range step {
switch l {
case string(lib.EnvironmentStepType):
case string(lib.PrintStepType):
case string(lib.ExecuteStepType):
default:
err = fmt.Errorf("validation error: invalid step type %s for task type %s in task number %d",
l, taskType, i+1)
logger.Error(err.Error(), zap.Error(err))
return
}
}
}
}
logger.Debug("successfully validated workflow")
return
}
func (w *Workflow) SplitNodes() (newWorkflowList []Workflow) {
logger := w.Logger
if validationErr := w.Validate(); validationErr != nil {
return
}
logger.Debug("splitting up nodes", zap.Any("task list", w.TaskList))
additionalEnvironmentList := []map[string]string{}
for i, taskData := range w.TaskList {
var node string
var stepList []interface{}
for j := range taskData {
switch j {
case string(lib.NodeAttribute):
node = taskData[j].(string)
default:
stepList = taskData[j].([]interface{})
}
}
if node == "" {
newWorkflowList = nil
logger.Debug("failed split up nodes as node value not found", zap.Any("task data", taskData))
return
} else {
newWf := &Workflow{
Version: w.Version,
EnvironmentList: w.EnvironmentList,
TaskList: []map[string]interface{}{w.TaskList[i]},
Node: node,
}
taskAdditionalEnvironmentList := []map[string]string{}
for k := range stepList {
step := stepList[k].(map[string]interface{})
for l := range step {
if l == string(lib.EnvironmentStepType) {
stepEnvironmentData := step[l].([]interface{})
for m := range stepEnvironmentData {
stepEnvironmentDataList := stepEnvironmentData[m].(map[string]interface{})
for n := range stepEnvironmentDataList {
taskAdditionalEnvironmentList = append(taskAdditionalEnvironmentList,
map[string]string{n: stepEnvironmentDataList[n].(string)})
}
}
}
}
}
for o := range additionalEnvironmentList {
newWf.EnvironmentList = append(newWf.EnvironmentList, additionalEnvironmentList[o])
}
for p := range taskAdditionalEnvironmentList {
additionalEnvironmentList = append(additionalEnvironmentList, taskAdditionalEnvironmentList[p])
}
newWorkflowList = append(newWorkflowList, *newWf)
}
}
logger.Debug("successfully split up nodes", zap.Any("workflow list", newWorkflowList))
return
}