This repository has been archived by the owner on May 31, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 82
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Tabular text implementation and tests (#88)
* Tabular text implementation and tests
- Loading branch information
1 parent
10d1d00
commit a82dd36
Showing
6 changed files
with
388 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,218 @@ | ||
| package format | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "reflect" | ||
| "strings" | ||
| "text/tabwriter" | ||
| ) | ||
|
|
||
| type Table struct { | ||
| writer tabwriter.Writer | ||
| } | ||
|
|
||
| const ( | ||
| noPrefix = "" | ||
| emptyVal = "-" | ||
| prefixNameDivider = "-" | ||
| tableDelimiter = "\t" | ||
| ) | ||
|
|
||
| func (f *Table) Write(o interface{}) { | ||
| val := reflect.ValueOf(o) | ||
| if !f.validate(val.Type()) { | ||
| SetFormatter(DefaultFormat) | ||
| Default.Write(o) | ||
| } else { | ||
| f.writeHeader(val) | ||
| f.writeValue(val) | ||
| f.writer.Flush() | ||
| } | ||
| } | ||
|
|
||
| func (f *Table) validate(val reflect.Type) bool { | ||
| if f.isSlice(val) { | ||
| return f.validateStruct(val.Elem()) | ||
| } else if f.isStruct(val) { | ||
| return f.validateStruct(val) | ||
| } else { | ||
| return true | ||
| } | ||
| } | ||
|
|
||
| func (f *Table) validateStruct(val reflect.Type) bool { | ||
| for i := 0; i < val.NumField(); i++ { | ||
| structFieldType := val.Field(i).Type | ||
| if f.isStruct(structFieldType) { | ||
| return false | ||
| } else if f.isSlice(structFieldType) && !f.validateSlice(structFieldType.Elem()) { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| func (f *Table) validateSlice(val reflect.Type) bool { | ||
| if f.isSimpleType(val) { | ||
| return true | ||
| } else if f.isStruct(val) { | ||
| for i := 0; i < val.NumField(); i++ { | ||
| structFieldType := val.Field(i).Type | ||
| if !f.isSimpleType(structFieldType) { | ||
| return false | ||
| } | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| func (f *Table) writeHeader(value reflect.Value) { | ||
| f.write(strings.Join(f.getHeader(noPrefix, value.Type()), tableDelimiter)) | ||
| f.newLine() | ||
| } | ||
|
|
||
| func (f *Table) getHeader(prefix string, value reflect.Type) []string { | ||
| if f.isStruct(value) { | ||
| headers := f.getStructHeaders(prefix, value) | ||
| return headers | ||
| } else if f.isSlice(value) { | ||
| headers := f.getHeader(prefix, value.Elem()) | ||
| return headers | ||
| } else { | ||
| return []string{prefix + value.Name()} | ||
| } | ||
| } | ||
|
|
||
| func (f *Table) getStructHeaders(prefix string, val reflect.Type) []string { | ||
| var headers []string | ||
| for i := 0; i < val.NumField(); i++ { | ||
| structFieldType := val.Field(i).Type | ||
| if f.isSlice(structFieldType) { | ||
| headers = append(headers, f.getHeader(prefix+val.Field(i).Name+prefixNameDivider, val.Field(i).Type.Elem())...) | ||
| } else { | ||
| headers = append(headers, prefix+val.Field(i).Name) | ||
| } | ||
| } | ||
| return headers | ||
| } | ||
|
|
||
| func (f *Table) writeValue(value reflect.Value) { | ||
| val := reflect.Indirect(value) | ||
| if f.isSimpleType(value.Type()) { | ||
| f.write(fmt.Sprint(value)) | ||
| } else if f.isStruct(value.Type()) { | ||
| maxCollectionSize := f.getMaxSliceSize(value) | ||
| if maxCollectionSize == 0 { | ||
| f.write(f.getSimpleStructOutput(val)) | ||
| } else { | ||
| f.write(f.getSliceOutput(maxCollectionSize, value)) | ||
| } | ||
| } else { | ||
| f.writeCollection(value) | ||
| } | ||
| } | ||
|
|
||
| func (f *Table) writeCollection(value reflect.Value) { | ||
| for i := 0; i < value.Len(); i++ { | ||
| maxCollectionSize := f.getMaxSliceSize(value.Index(i)) | ||
| if maxCollectionSize == 0 { | ||
| f.write(f.getSimpleStructOutput(value.Index(i))) | ||
| } else { | ||
| f.write(f.getSliceOutput(maxCollectionSize, value.Index(i))) | ||
| } | ||
| f.newLine() | ||
| } | ||
| } | ||
|
|
||
| func (f *Table) getMaxSliceSize(value reflect.Value) int { | ||
| maxSize := 0 | ||
| for i := 0; i < value.Type().NumField(); i++ { | ||
| field := value.Field(i) | ||
| if f.isSlice(field.Type()) && field.Len() > maxSize { | ||
| maxSize = field.Len() | ||
| } | ||
| } | ||
| return maxSize | ||
| } | ||
|
|
||
| func (f *Table) getSliceOutput(maxCollectionSize int, value reflect.Value) string { | ||
| val := reflect.Indirect(value) | ||
| var outputRowList []string | ||
| output := "" | ||
|
|
||
| for rowIndex := 0; rowIndex < maxCollectionSize; rowIndex++ { | ||
| for structIndex := 0; structIndex < val.Type().NumField(); structIndex++ { | ||
| structField := val.Field(structIndex) | ||
| if f.isSimpleType(structField.Type()) { | ||
| outputRowList = f.appendSimpleValue(structField, outputRowList, rowIndex) | ||
| } else if f.isStruct(structField.Type().Elem()) { | ||
| outputRowList = f.appendSliceStructRow(structField, outputRowList, rowIndex) | ||
| } else if f.isSlice(structField.Type()) { | ||
| outputRowList = f.appendSimpleSlice(structField, outputRowList, rowIndex) | ||
| } else { | ||
| outputRowList = append(outputRowList, fmt.Sprint(structField)) | ||
| } | ||
| } | ||
| output += strings.Join(outputRowList, tableDelimiter) + "\n" | ||
| outputRowList = outputRowList[:0] | ||
| } | ||
|
|
||
| return output | ||
| } | ||
|
|
||
| func (f *Table) appendSliceStructRow(field reflect.Value, outputList []string, row int) []string { | ||
| for k := 0; k < field.Type().Elem().NumField(); k++ { | ||
| if row >= field.Len() { | ||
| outputList = append(outputList, emptyVal) | ||
| } else { | ||
| outputList = append(outputList, fmt.Sprint(field.Index(row).Field(k))) | ||
| } | ||
| } | ||
| return outputList | ||
| } | ||
|
|
||
| func (f *Table) appendSimpleSlice(field reflect.Value, outputList []string, row int) []string { | ||
| if row >= field.Len() { | ||
| outputList = append(outputList, emptyVal) | ||
| } else { | ||
| outputList = append(outputList, fmt.Sprint(field.Index(row))) | ||
| } | ||
| return outputList | ||
| } | ||
|
|
||
| func (f *Table) appendSimpleValue(field reflect.Value, outputList[]string, row int) []string { | ||
| if row > 0 { | ||
| outputList = append(outputList, emptyVal) | ||
| } else { | ||
| outputList = append(outputList, fmt.Sprint(field)) | ||
| } | ||
| return outputList | ||
| } | ||
|
|
||
| func (f *Table) getSimpleStructOutput(val reflect.Value) string { | ||
| var outputList []string | ||
| for i := 0; i < val.Type().NumField(); i++ { | ||
| outputList = append(outputList, fmt.Sprint(val.Field(i))) | ||
| } | ||
| return strings.Join(outputList, tableDelimiter) | ||
| } | ||
|
|
||
| func (f *Table) isSimpleType(value reflect.Type) bool { | ||
| return !(value.Kind() == reflect.Slice || value.Kind() == reflect.Struct) | ||
| } | ||
|
|
||
| func (f *Table) isSlice(value reflect.Type) bool { | ||
| return value.Kind() == reflect.Slice | ||
| } | ||
|
|
||
| func (f *Table) isStruct(value reflect.Type) bool { | ||
| return value.Kind() == reflect.Struct | ||
| } | ||
|
|
||
| func (f *Table) write(v interface{}) { | ||
| _, _ = fmt.Fprint(&f.writer, v) | ||
| } | ||
|
|
||
| func (f *Table) newLine() { | ||
| _, _ = fmt.Fprintln(&f.writer) | ||
| } |
Oops, something went wrong.