mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-13 20:16:30 +00:00
203 lines
4.6 KiB
Go
203 lines
4.6 KiB
Go
package output
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import (
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"fmt"
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"io"
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"reflect"
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"sort"
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"strings"
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"text/tabwriter"
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"unicode"
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"github.com/mitchellh/mapstructure"
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)
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// NewTable creates a new Table.
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func NewTable(out io.Writer) *Table {
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padding := 2
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return &Table{
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w: tabwriter.NewWriter(out, 0, 0, padding, ' ', 0),
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columns: map[string]bool{},
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fieldMapping: map[string]FieldFn{},
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fieldAlias: map[string]string{},
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allowedFields: map[string]bool{},
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}
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}
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type FieldFn func(obj any) string
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type writerFlusher interface {
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io.Writer
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Flush() error
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}
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// Table is a generic way to format object as a table.
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type Table struct {
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w writerFlusher
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columns map[string]bool
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fieldMapping map[string]FieldFn
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fieldAlias map[string]string
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allowedFields map[string]bool
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}
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// Columns returns a list of known output columns.
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func (o *Table) Columns() (cols []string) {
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for c := range o.columns {
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cols = append(cols, c)
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}
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sort.Strings(cols)
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return
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}
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// AddFieldAlias overrides the field name to allow custom column headers.
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func (o *Table) AddFieldAlias(field, alias string) *Table {
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o.fieldAlias[field] = alias
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return o
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}
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// AddFieldFn adds a function which handles the output of the specified field.
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func (o *Table) AddFieldFn(field string, fn FieldFn) *Table {
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o.fieldMapping[field] = fn
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o.allowedFields[field] = true
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o.columns[field] = true
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return o
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}
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// AddAllowedFields reads all first level field names of the struct and allows them to be used.
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func (o *Table) AddAllowedFields(obj any) (*Table, error) {
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v := reflect.ValueOf(obj)
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if v.Kind() != reflect.Struct {
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return o, fmt.Errorf("AddAllowedFields input must be a struct")
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}
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t := v.Type()
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for i := 0; i < v.NumField(); i++ {
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k := t.Field(i).Type.Kind()
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if k != reflect.Bool &&
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k != reflect.Float32 &&
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k != reflect.Float64 &&
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k != reflect.String &&
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k != reflect.Int &&
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k != reflect.Int64 {
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// only allow simple values
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// complex values need to be mapped via a FieldFn
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continue
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}
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o.allowedFields[strings.ToLower(t.Field(i).Name)] = true
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o.allowedFields[fieldName(t.Field(i).Name)] = true
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o.columns[fieldName(t.Field(i).Name)] = true
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}
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return o, nil
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}
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// RemoveAllowedField removes fields from the allowed list.
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func (o *Table) RemoveAllowedField(fields ...string) *Table {
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for _, field := range fields {
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delete(o.allowedFields, field)
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delete(o.columns, field)
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}
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return o
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}
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// ValidateColumns returns an error if invalid columns are specified.
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func (o *Table) ValidateColumns(cols []string) error {
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var invalidCols []string
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for _, col := range cols {
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if _, ok := o.allowedFields[strings.ToLower(col)]; !ok {
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invalidCols = append(invalidCols, col)
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}
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}
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if len(invalidCols) > 0 {
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return fmt.Errorf("invalid table columns: %s", strings.Join(invalidCols, ","))
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}
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return nil
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}
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// WriteHeader writes the table header.
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func (o *Table) WriteHeader(columns []string) {
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var header []string
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for _, col := range columns {
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if alias, ok := o.fieldAlias[col]; ok {
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col = alias
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}
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header = append(header, strings.ReplaceAll(strings.ToUpper(col), "_", " "))
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}
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_, _ = fmt.Fprintln(o.w, strings.Join(header, "\t"))
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}
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func (o *Table) Flush() error {
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return o.w.Flush()
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}
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// Write writes a table line.
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func (o *Table) Write(columns []string, obj any) error {
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var data map[string]any
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if err := mapstructure.Decode(obj, &data); err != nil {
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return fmt.Errorf("failed to decode object: %w", err)
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}
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dataL := map[string]any{}
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for key, value := range data {
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dataL[strings.ToLower(key)] = value
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}
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var out []string
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for _, col := range columns {
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colName := strings.ToLower(col)
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if alias, ok := o.fieldAlias[colName]; ok {
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if fn, ok := o.fieldMapping[alias]; ok {
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out = append(out, fn(obj))
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continue
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}
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}
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if fn, ok := o.fieldMapping[colName]; ok {
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out = append(out, fn(obj))
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continue
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}
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if value, ok := dataL[strings.ReplaceAll(colName, "_", "")]; ok {
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if value == nil {
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out = append(out, NA(""))
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continue
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}
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if b, ok := value.(bool); ok {
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out = append(out, YesNo(b))
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continue
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}
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if s, ok := value.(string); ok {
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out = append(out, NA(s))
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continue
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}
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out = append(out, fmt.Sprintf("%v", value))
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}
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}
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_, _ = fmt.Fprintln(o.w, strings.Join(out, "\t"))
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return nil
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}
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func NA(s string) string {
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if s == "" {
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return "-"
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}
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return s
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}
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func YesNo(b bool) string {
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if b {
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return "yes"
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}
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return "no"
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}
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func fieldName(name string) string {
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r := []rune(name)
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var out []rune
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for i := range r {
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if i > 0 && (unicode.IsUpper(r[i])) && (i+1 < len(r) && unicode.IsLower(r[i+1]) || unicode.IsLower(r[i-1])) {
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out = append(out, '_')
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}
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out = append(out, unicode.ToLower(r[i]))
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}
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return string(out)
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}
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