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package filter
import (
"strings"
)
var FilterList = map[string]func() Filter{
"uppercase": NewUppercaseFilter,
"lowercase": NewLowercaseFilter,
"lowercase_extra": NewLowercaseFilterWithExtraSteps,
"doubler": NewDoubleFilter,
"inverse": NewInverseFilter,
"l33t": NewLeetFilter,
"reverse": NewReverseFilter,
"uwu": NewUwuFilter,
}
func NewUppercaseFilter() Filter {
uppercaseFilter := Filter{
name: "Uppercase",
action: strings.ToUpper,
subfilters: []Filter{},
}
return uppercaseFilter
}
func NewLowercaseFilter() Filter {
lowercaseFilter := Filter{
name: "Lowercase",
action: strings.ToLower,
subfilters: []Filter{},
}
return lowercaseFilter
}
func NewLowercaseFilterWithExtraSteps() Filter {
var subfilters []Filter
subfilters = append(subfilters, NewUppercaseFilter())
subfilters = append(subfilters, NewLowercaseFilter())
filter := Filter{
name: "Lowercase (extra dumb)",
action: func(string) string { return "" },
subfilters: subfilters,
}
return filter
}
func doubleFilterAction(content string) string {
var temp strings.Builder
for _, character := range content {
for i := 0; i < 2; i++ {
temp.WriteString(string(character))
}
}
return temp.String()
}
func NewDoubleFilter() Filter {
filter := Filter{
name: "Doubler",
action: doubleFilterAction,
subfilters: []Filter{},
}
return filter
}
func inverseFilterAction(content string) string {
var temp strings.Builder
for _, character := range content {
strchar := string(character)
lower := strings.ToLower(strchar)
upper := strings.ToUpper(strchar)
if strchar == lower {
temp.WriteString(upper)
}
if strchar == upper {
temp.WriteString(lower)
}
}
return temp.String()
}
func NewInverseFilter() Filter {
filter := Filter{
name: "Inverse case",
action: inverseFilterAction,
subfilters: []Filter{},
}
return filter
}
func leetFilterAction(content string) string {
replacements := map[string]string{
"e": "3",
"E": "3",
"i": "1",
"I": "1",
"a": "4",
"A": "4",
"b": "8",
"B": "8",
"t": "7",
"T": "7",
"o": "0",
"O": "0",
}
var temp strings.Builder
for _, character := range content {
strchar := string(character)
value, ok := replacements[strchar]
if ok {
temp.WriteString(value)
} else {
temp.WriteString(strchar)
}
}
return temp.String()
}
func NewLeetFilter() Filter {
filter := Filter{
name: "l33t",
action: leetFilterAction,
subfilters: []Filter{},
}
return filter
}
// https://stackoverflow.com/a/1754209
func reverseString(content string) string {
n := 0
rune := make([]rune, len(content))
for _, r := range content {
rune[n] = r
n++
}
rune = rune[0:n]
for i := 0; i < n/2; i++ {
rune[i], rune[n-1-i] = rune[n-1-i], rune[i]
}
output := string(rune)
return output
}
func NewReverseFilter() Filter {
filter := Filter{
name: "Reverser",
action: reverseString,
subfilters: []Filter{},
}
return filter
}
func uwuFilterAction(content string) string {
var temp strings.Builder
replacements := map[string]string{
"r": "w",
"u": "uwu",
"l": "w",
"R": "W",
"U": "UWU",
"L": "W",
}
for _, character := range content {
strchar := string(character)
value, ok := replacements[strchar]
if ok {
temp.WriteString(value)
} else {
temp.WriteString(strchar)
}
}
return temp.String()
}
func NewUwuFilter() Filter {
filter := Filter{
name: "Uwuifier",
action: uwuFilterAction,
subfilters: []Filter{},
}
return filter
}
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