1package pflag
2
3import (
4	"bytes"
5	"fmt"
6	"strconv"
7	"strings"
8)
9
10// -- stringToInt Value
11type stringToIntValue struct {
12	value   *map[string]int
13	changed bool
14}
15
16func newStringToIntValue(val map[string]int, p *map[string]int) *stringToIntValue {
17	ssv := new(stringToIntValue)
18	ssv.value = p
19	*ssv.value = val
20	return ssv
21}
22
23// Format: a=1,b=2
24func (s *stringToIntValue) Set(val string) error {
25	ss := strings.Split(val, ",")
26	out := make(map[string]int, len(ss))
27	for _, pair := range ss {
28		kv := strings.SplitN(pair, "=", 2)
29		if len(kv) != 2 {
30			return fmt.Errorf("%s must be formatted as key=value", pair)
31		}
32		var err error
33		out[kv[0]], err = strconv.Atoi(kv[1])
34		if err != nil {
35			return err
36		}
37	}
38	if !s.changed {
39		*s.value = out
40	} else {
41		for k, v := range out {
42			(*s.value)[k] = v
43		}
44	}
45	s.changed = true
46	return nil
47}
48
49func (s *stringToIntValue) Type() string {
50	return "stringToInt"
51}
52
53func (s *stringToIntValue) String() string {
54	var buf bytes.Buffer
55	i := 0
56	for k, v := range *s.value {
57		if i > 0 {
58			buf.WriteRune(',')
59		}
60		buf.WriteString(k)
61		buf.WriteRune('=')
62		buf.WriteString(strconv.Itoa(v))
63		i++
64	}
65	return "[" + buf.String() + "]"
66}
67
68func stringToIntConv(val string) (interface{}, error) {
69	val = strings.Trim(val, "[]")
70	// An empty string would cause an empty map
71	if len(val) == 0 {
72		return map[string]int{}, nil
73	}
74	ss := strings.Split(val, ",")
75	out := make(map[string]int, len(ss))
76	for _, pair := range ss {
77		kv := strings.SplitN(pair, "=", 2)
78		if len(kv) != 2 {
79			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
80		}
81		var err error
82		out[kv[0]], err = strconv.Atoi(kv[1])
83		if err != nil {
84			return nil, err
85		}
86	}
87	return out, nil
88}
89
90// GetStringToInt return the map[string]int value of a flag with the given name
91func (f *FlagSet) GetStringToInt(name string) (map[string]int, error) {
92	val, err := f.getFlagType(name, "stringToInt", stringToIntConv)
93	if err != nil {
94		return map[string]int{}, err
95	}
96	return val.(map[string]int), nil
97}
98
99// StringToIntVar defines a string flag with specified name, default value, and usage string.
100// The argument p points to a map[string]int variable in which to store the values of the multiple flags.
101// The value of each argument will not try to be separated by comma
102func (f *FlagSet) StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
103	f.VarP(newStringToIntValue(value, p), name, "", usage)
104}
105
106// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
107func (f *FlagSet) StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
108	f.VarP(newStringToIntValue(value, p), name, shorthand, usage)
109}
110
111// StringToIntVar defines a string flag with specified name, default value, and usage string.
112// The argument p points to a map[string]int variable in which to store the value of the flag.
113// The value of each argument will not try to be separated by comma
114func StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
115	CommandLine.VarP(newStringToIntValue(value, p), name, "", usage)
116}
117
118// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
119func StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
120	CommandLine.VarP(newStringToIntValue(value, p), name, shorthand, usage)
121}
122
123// StringToInt defines a string flag with specified name, default value, and usage string.
124// The return value is the address of a map[string]int variable that stores the value of the flag.
125// The value of each argument will not try to be separated by comma
126func (f *FlagSet) StringToInt(name string, value map[string]int, usage string) *map[string]int {
127	p := map[string]int{}
128	f.StringToIntVarP(&p, name, "", value, usage)
129	return &p
130}
131
132// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
133func (f *FlagSet) StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
134	p := map[string]int{}
135	f.StringToIntVarP(&p, name, shorthand, value, usage)
136	return &p
137}
138
139// StringToInt defines a string flag with specified name, default value, and usage string.
140// The return value is the address of a map[string]int variable that stores the value of the flag.
141// The value of each argument will not try to be separated by comma
142func StringToInt(name string, value map[string]int, usage string) *map[string]int {
143	return CommandLine.StringToIntP(name, "", value, usage)
144}
145
146// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
147func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
148	return CommandLine.StringToIntP(name, shorthand, value, usage)
149}
150