109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
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package config
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import (
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"errors"
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"os"
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"path/filepath"
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"strings"
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"gopkg.in/yaml.v3"
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)
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// App represents a HPDS Application.
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type App struct {
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Name string `yaml:"name"`
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}
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// Workflow represents a HPDS Workflow.
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type Workflow struct {
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Functions []App `yaml:"functions"`
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}
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// WorkflowConfig represents a HPDS Workflow config.
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type WorkflowConfig struct {
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// Name represents the name of the zipper.
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Name string `yaml:"name"`
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// Host represents the listening host of the zipper.
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Host string `yaml:"host"`
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// Port represents the listening port of the zipper.
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Port int `yaml:"port"`
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// Workflow represents the sfn workflow.
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Workflow `yaml:",inline"`
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}
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// ErrWorkflowConfigExt represents the extension of workflow config is incorrect.
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var ErrWorkflowConfigExt = errors.New(`workflow: the extension of workflow config is incorrect, it should ".yaml|.yml"`)
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// LoadWorkflowConfig the WorkflowConfig by path.
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func LoadWorkflowConfig(path string) (*WorkflowConfig, error) {
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buffer, err := os.ReadFile(path)
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if err != nil {
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return nil, err
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}
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return load(buffer)
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}
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func load(data []byte) (*WorkflowConfig, error) {
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var config = &WorkflowConfig{}
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err := yaml.Unmarshal(data, config)
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if err != nil {
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return nil, err
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}
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return config, nil
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}
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// ParseWorkflowConfig parses the config.
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func ParseWorkflowConfig(config string) (*WorkflowConfig, error) {
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if ext := filepath.Ext(config); ext != ".yaml" && ext != ".yml" {
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return nil, ErrWorkflowConfigExt
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}
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// parse workflow.yaml
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wfConf, err := LoadWorkflowConfig(config)
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if err != nil {
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return nil, err
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}
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// validate
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err = validateWorkflowConfig(wfConf)
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if err != nil {
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return nil, err
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}
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return wfConf, nil
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}
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func validateWorkflowConfig(wfConf *WorkflowConfig) error {
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if wfConf == nil {
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return errors.New("workflow: config nil")
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}
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m := map[string][]App{
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"Functions": wfConf.Functions,
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}
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missingParams := []string{}
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for k, apps := range m {
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for _, app := range apps {
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if app.Name == "" {
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missingParams = append(missingParams, k)
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}
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}
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}
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errMsg := ""
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if wfConf.Name == "" || wfConf.Host == "" || wfConf.Port <= 0 {
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errMsg = "Missing name, host or port in workflow config. "
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}
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if len(missingParams) > 0 {
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errMsg += "Missing name, host or port in " + strings.Join(missingParams, ", "+". ")
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}
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if errMsg != "" {
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return errors.New(errMsg)
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}
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return nil
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}
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