mirror of https://gitea.com/gitea/tea.git
148 lines
3.8 KiB
Go
148 lines
3.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package print
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import (
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"fmt"
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"os"
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"sort"
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"strconv"
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"strings"
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"github.com/olekukonko/tablewriter"
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)
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// table provides infrastructure to easily print (sorted) lists in different formats
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type table struct {
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headers []string
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values [][]string
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sortDesc bool // used internally by sortable interface
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sortColumn uint // ↑
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}
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// printable can be implemented for structs to put fields dynamically into a table
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type printable interface {
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FormatField(field string, machineReadable bool) string
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}
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// high level api to print a table of items with dynamic fields
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func tableFromItems(fields []string, values []printable, machineReadable bool) table {
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t := table{headers: fields}
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for _, v := range values {
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row := make([]string, len(fields))
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for i, f := range fields {
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row[i] = v.FormatField(f, machineReadable)
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}
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t.addRowSlice(row)
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}
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return t
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}
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func tableWithHeader(header ...string) table {
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return table{headers: header}
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}
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// it's the callers responsibility to ensure row length is equal to header length!
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func (t *table) addRow(row ...string) {
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t.addRowSlice(row)
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}
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// it's the callers responsibility to ensure row length is equal to header length!
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func (t *table) addRowSlice(row []string) {
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t.values = append(t.values, row)
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}
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func (t *table) sort(column uint, desc bool) {
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t.sortColumn = column
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t.sortDesc = desc
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sort.Stable(t) // stable to allow multiple calls to sort
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}
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// sortable interface
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func (t table) Len() int { return len(t.values) }
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func (t table) Swap(i, j int) { t.values[i], t.values[j] = t.values[j], t.values[i] }
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func (t table) Less(i, j int) bool {
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const column = 0
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if t.sortDesc {
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i, j = j, i
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}
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return t.values[i][t.sortColumn] < t.values[j][t.sortColumn]
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}
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func (t *table) print(output string) {
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switch output {
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case "", "table":
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outputtable(t.headers, t.values)
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case "csv":
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outputdsv(t.headers, t.values, ",")
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case "simple":
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outputsimple(t.headers, t.values)
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case "tsv":
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outputdsv(t.headers, t.values, "\t")
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case "yml", "yaml":
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outputyaml(t.headers, t.values)
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default:
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fmt.Printf("unknown output type '" + output + "', available types are:\n- csv: comma-separated values\n- simple: space-separated values\n- table: auto-aligned table format (default)\n- tsv: tab-separated values\n- yaml: YAML format\n")
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}
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}
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// outputtable prints structured data as table
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func outputtable(headers []string, values [][]string) {
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table := tablewriter.NewWriter(os.Stdout)
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if len(headers) > 0 {
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table.SetHeader(headers)
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}
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for _, value := range values {
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table.Append(value)
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}
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table.Render()
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}
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// outputsimple prints structured data as space delimited value
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func outputsimple(headers []string, values [][]string) {
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for _, value := range values {
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fmt.Printf(strings.Join(value, " "))
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fmt.Printf("\n")
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}
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}
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// outputdsv prints structured data as delimiter separated value format
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func outputdsv(headers []string, values [][]string, delimiterOpt ...string) {
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delimiter := ","
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if len(delimiterOpt) > 0 {
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delimiter = delimiterOpt[0]
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}
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fmt.Println("\"" + strings.Join(headers, "\""+delimiter+"\"") + "\"")
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for _, value := range values {
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fmt.Printf("\"")
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fmt.Printf(strings.Join(value, "\""+delimiter+"\""))
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fmt.Printf("\"")
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fmt.Printf("\n")
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}
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}
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// outputyaml prints structured data as yaml
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func outputyaml(headers []string, values [][]string) {
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for _, value := range values {
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fmt.Println("-")
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for j, val := range value {
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intVal, _ := strconv.Atoi(val)
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if strconv.Itoa(intVal) == val {
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fmt.Printf(" %s: %s\n", headers[j], val)
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} else {
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fmt.Printf(" %s: '%s'\n", headers[j], val)
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}
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}
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}
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}
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func isMachineReadable(outputFormat string) bool {
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switch outputFormat {
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case "yml", "yaml", "csv", "tsv":
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return true
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}
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return false
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}
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