✨ Add Slug Generator

config_test.go

@@ -10,7 +10,7 @@ import (
 func TestNewConf(t *testing.T) {
 	c := NewConfig()
 	assert.Equal(t, ".txt", c.extension)
-	st, _ := c.generator()
+	st, _ := c.generator(&c)
 	_, parseErr := uuid.Parse(st)
 	assert.NoError(t, parseErr)
 }

generators.go

@@ -2,15 +2,17 @@ package nomino
 
 import (
 	"errors"
+	"strconv"
 	"time"
 
 	"github.com/google/uuid"
+	"github.com/gosimple/slug"
 )
 
 // Generator is a function that returns the "random" portion of the returned filename.
 // Technically, it doesn't necessarily need to be random, and could be based on time, or a counter,
 // for example.
-type Generator func() (string, error)
+type Generator func(conf *Config) (string, error)
 
 // WithGenerator sets the specified generator
 func WithGenerator(g Generator) Option {
@@ -22,7 +24,7 @@ func WithGenerator(g Generator) Option {
 // ErrMissingGenerators is returned by a multi-generator if no generators are supplied.
 var ErrMissingGenerators = errors.New("no generators supplied")
 
-func missingGen() (string, error) {
+func missingGen(*Config) (string, error) {
 	return "", ErrMissingGenerators
 }
 
@@ -38,14 +40,14 @@ func MultiGeneratorInOrder(gens ...Generator) Generator {
 	}
 
 	var idx int
-	return func() (string, error) {
-		st, err := gens[idx]()
+	return func(c *Config) (string, error) {
+		st, err := gens[idx](c)
 		idx = (idx + 1) % len(gens)
 		return st, err
 	}
 }
 
-func uuidGen() (string, error) {
+func uuidGen(*Config) (string, error) {
 	u, err := uuid.NewRandom()
 	if err != nil {
 		return "", err
@@ -80,12 +82,12 @@ func Time(t time.Time) Generator {
 
 // FormattedTime generates a date and time for the supplied time with the supplied format.
 func FormattedTime(t time.Time, f string) Generator {
-	return func() (string, error) {
+	return func(*Config) (string, error) {
 		return t.Format(f), nil
 	}
 }
 
-// FileTimestamp is the default format for WithTimestampUTC and WithTimeUTC
+// FileTimestampNoTZ is the default format for WithTimestampUTC and WithTimeUTC
 const FileTimestampNoTZ string = "2006-01-02_03-05-06"
 
 // TimestampUTC generates a date and time for the current time in UTC without a timezone in the format.
@@ -97,3 +99,58 @@ func TimestampUTC() Generator {
 func TimeUTC(t time.Time) Generator {
 	return FormattedTime(t.UTC(), FileTimestampNoTZ)
 }
+
+// Incremental generates a name that is a series of integers starting at 0
+func Incremental() Generator {
+	return IncrementalWithStartAndStep(0, 1)
+}
+
+// IncrementalWithStart generates a name that is a series of integers starting at the specified number
+func IncrementalWithStart(start int) Generator {
+	return IncrementalWithStartAndStep(start, 1)
+}
+
+// IncrementalWithStep generates a name that is a series of integers, starting at 0, and increasing the specified number each time
+func IncrementalWithStep(step int) Generator {
+	return IncrementalWithStartAndStep(0, step)
+}
+
+// InrementalWithStartAndStep generates a name that is a series of integers, starting at the specified number, and increasing the specified step each time
+func IncrementalWithStartAndStep(start, step int) Generator {
+	next := start
+	return func(*Config) (string, error) {
+		out := strconv.Itoa(next)
+		next += step
+		return out, nil
+	}
+}
+
+// ErrMissingOriginal is the error returned by Slug if there is no filename
+var ErrMissingOriginal = errors.New("missing original filename")
+
+func getOriginal(c *Config) (string, error) {
+	if c.original == "" {
+		return "", ErrMissingOriginal
+	}
+	name := c.original
+	c.original = ""
+	return name, nil
+}
+
+// Slug generates a name from the original filename.
+// When this is used, the original filename will be removed from the final filename.
+func Slug() Generator {
+	return func(c *Config) (string, error) {
+		name, err := getOriginal(c)
+		return slug.Make(name), err
+	}
+}
+
+// SlugWithLang generates a name from the original filename, accounting for the given language.
+// When this is used, the original filename will be removed from the final filename.
+func SlugWithLang(lang string) Generator {
+	return func(c *Config) (string, error) {
+		name, err := getOriginal(c)
+		return slug.MakeLang(name, lang), err
+	}
+}

generators_examples_test.go

@@ -3,7 +3,7 @@ package nomino
 import "fmt"
 
 func ExampleWithGenerator_custom_generator() {
-	gen := func() (string, error) {
+	gen := func(*Config) (string, error) {
 		return "hello", nil
 	}
 	option := WithGenerator(gen)
@@ -18,3 +18,91 @@ func ExampleWithGenerator_custom_generator() {
 	// hello.txt
 	// hello
 }
+
+func ExampleIncremental() {
+	conf := NewConfig(WithPrefix("foo"), WithGenerator(Incremental()))
+
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	// Output:
+	// foo_0.txt
+	// foo_1.txt
+	// foo_2.txt
+}
+
+func ExampleIncrementalWithStart() {
+	conf := NewConfig(WithPrefix("foo"), WithGenerator(IncrementalWithStart(42)))
+
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	// Output:
+	// foo_42.txt
+	// foo_43.txt
+	// foo_44.txt
+}
+
+func ExampleIncrementalWithStep() {
+	conf := NewConfig(WithPrefix("foo"), WithGenerator(IncrementalWithStep(2)))
+
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	// Output:
+	// foo_0.txt
+	// foo_2.txt
+	// foo_4.txt
+}
+
+func ExampleIncrementalWithStartAndStep() {
+	conf := NewConfig(WithPrefix("foo"), WithGenerator(IncrementalWithStartAndStep(42, 2)))
+
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	str, _ = Make(conf)
+	fmt.Println(str)
+
+	// Output:
+	// foo_42.txt
+	// foo_44.txt
+	// foo_46.txt
+}
+
+func ExampleSlug() {
+	conf := NewConfig(WithGenerator(Slug()), WithOriginal("My name is Jimmy"))
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	// Output: my-name-is-jimmy.txt
+}
+
+func ExampleSlugWithLang() {
+	conf := NewConfig(WithGenerator(SlugWithLang("de")), WithOriginal("Diese & Dass"))
+	str, _ := Make(conf)
+	fmt.Println(str)
+
+	// Output: diese-und-dass.txt
+}

generators_test.go

@@ -10,10 +10,10 @@ import (
 )
 
 func TestWithGenerator(t *testing.T) {
-	g := func() (string, error) { return "abc", nil }
+	g := func(*Config) (string, error) { return "abc", nil }
 	var c Config
 	WithGenerator(g)(&c)
-	st, err := c.generator()
+	st, err := c.generator(&c)
 	assert.NoError(t, err)
 	assert.Equal(t, "abc", st)
 }
@@ -22,49 +22,49 @@ func TestMultiGeneratorInOrder(t *testing.T) {
 	st1 := "abc"
 	st2 := "def"
 	er1 := errors.New("oops")
-	g1 := func() (string, error) { return st1, nil }
-	g2 := func() (string, error) { return st2, nil }
-	g3 := func() (string, error) { return "", er1 }
+	g1 := func(*Config) (string, error) { return st1, nil }
+	g2 := func(*Config) (string, error) { return st2, nil }
+	g3 := func(*Config) (string, error) { return "", er1 }
 	g := MultiGeneratorInOrder(g1, g2, g3)
-	st, err := g()
+	st, err := g(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, st1, st)
-	st, err = g()
+	st, err = g(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, st2, st)
-	st, err = g()
+	st, err = g(nil)
 	assert.Zero(t, st)
 	assert.ErrorIs(t, err, er1)
-	st, err = g()
+	st, err = g(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, st1, st)
 }
 
 func TestMultiGeneratorInOrderOne(t *testing.T) {
 	st1 := "abc"
-	g1 := func() (string, error) { return st1, nil }
+	g1 := func(*Config) (string, error) { return st1, nil }
 	g := MultiGeneratorInOrder(g1)
 
-	st, err := g()
+	st, err := g(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, st1, st)
-	st, err = g()
+	st, err = g(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, st1, st)
 }
 
 func TestMultiGeneratorInOrderMissing(t *testing.T) {
 	g := MultiGeneratorInOrder()
-	st, err := g()
+	st, err := g(nil)
 	assert.Zero(t, st)
 	assert.ErrorIs(t, err, ErrMissingGenerators)
-	st, err = g()
+	st, err = g(nil)
 	assert.Zero(t, st)
 	assert.ErrorIs(t, err, ErrMissingGenerators)
 }
 
 func TestUUID(t *testing.T) {
-	st, err := UUID()()
+	st, err := UUID()(nil)
 	assert.NoError(t, err)
 	_, parseErr := uuid.Parse(st)
 	assert.NoError(t, parseErr)
@@ -80,13 +80,13 @@ func TestUUIDFail(t *testing.T) {
 	uuid.SetRand(badRead{})
 	defer uuid.SetRand(nil)
 
-	_, err := UUID()()
+	_, err := UUID()(nil)
 	assert.Equal(t, errors.New("sorry"), err)
 }
 
 func TestTimestamp(t *testing.T) {
 	n := time.Now()
-	st, err := Timestamp()()
+	st, err := Timestamp()(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, n.Format(FileTimestamp), st)
 }
@@ -94,14 +94,29 @@ func TestTimestamp(t *testing.T) {
 func TestTime(t *testing.T) {
 	d := time.Date(1986, time.March, 28, 12, 0, 0, 0, time.UTC)
 
-	st, err := Time(d)()
+	st, err := Time(d)(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, d.Format(FileTimestamp), st)
 }
 
 func TestTimestampUTC(t *testing.T) {
 	n := time.Now()
-	st, err := TimestampUTC()()
+	st, err := TimestampUTC()(nil)
 	assert.NoError(t, err)
 	assert.Equal(t, n.UTC().Format(FileTimestampNoTZ), st)
 }
+
+func TestSlugMissingFilename(t *testing.T) {
+	conf := NewConfig(WithGenerator(Slug()))
+	st, err := conf.generator(&conf)
+	assert.Zero(t, st)
+	assert.ErrorIs(t, err, ErrMissingOriginal)
+}
+
+func TestSlugRemovesOriginal(t *testing.T) {
+	conf := NewConfig(WithGenerator(Slug()), WithOriginal("Hello, World"))
+	st, err := conf.generator(&conf)
+	assert.Zero(t, conf.original)
+	assert.Equal(t, "hello-world", st)
+	assert.NoError(t, err)
+}

go.mod

@@ -4,11 +4,13 @@ go 1.23.6
 
 require (
 	github.com/google/uuid v1.6.0
+	github.com/gosimple/slug v1.15.0
 	github.com/stretchr/testify v1.10.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gosimple/unidecode v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -2,6 +2,10 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gosimple/slug v1.15.0 h1:wRZHsRrRcs6b0XnxMUBM6WK1U1Vg5B0R7VkIf1Xzobo=
+github.com/gosimple/slug v1.15.0/go.mod h1:UiRaFH+GEilHstLUmcBgWcI42viBN7mAb818JrYOeFQ=
+github.com/gosimple/unidecode v1.0.1 h1:hZzFTMMqSswvf0LBJZCZgThIZrpDHFXux9KeGmn6T/o=
+github.com/gosimple/unidecode v1.0.1/go.mod h1:CP0Cr1Y1kogOtx0bJblKzsVWrqYaqfNOnHzpgWw4Awc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=

make.go

@@ -6,7 +6,7 @@ import "fmt"
 // In general, the final filename will be [prefix]_[generated_string]_[original_filename]_[suffix].[extension].
 // If the name generator returns an error (generally, it shouldn't), that will be returned instead.
 func Make(conf Config) (string, error) {
-	name, err := conf.generator()
+	name, err := conf.generator(&conf)
 	if err != nil {
 		return "", err
 	}

make_test.go

@@ -8,7 +8,7 @@ import (
 )
 
 func TestMake(t *testing.T) {
-	genOpt := WithGenerator(func() (string, error) { return "abc", nil })
+	genOpt := WithGenerator(func(*Config) (string, error) { return "abc", nil })
 	testcases := []struct {
 		name string
 		opts []Option
@@ -47,8 +47,20 @@ func TestMake(t *testing.T) {
 
 func TestMakeErr(t *testing.T) {
 	retErr := errors.New("oops")
-	conf := NewConfig(WithGenerator(func() (string, error) { return "foobar", retErr }))
+	conf := NewConfig(WithGenerator(func(*Config) (string, error) { return "foobar", retErr }))
 	st, err := Make(conf)
 	assert.Zero(t, st)
 	assert.ErrorIs(t, err, retErr)
 }
+
+func TestMakeDoesntChangeConf(t *testing.T) {
+	gen := func(c *Config) (string, error) {
+		c.original = ""
+		return "foo", nil
+	}
+	conf := NewConfig(WithGenerator(gen), WithOriginal("foobar"))
+	st, err := Make(conf)
+	assert.Equal(t, "foobar", conf.original)
+	assert.Equal(t, "foo.txt", st)
+	assert.NoError(t, err)
+}

options.go

@@ -1,6 +1,10 @@
 package nomino
 
-import "strings"
+import (
+	"strings"
+
+	"github.com/gosimple/slug"
+)
 
 // Option sets configuration parameters for Config.
 type Option func(c *Config)
@@ -13,6 +17,22 @@ func WithOriginal(o string) Option {
 	}
 }
 
+// WithOriginal sets the original filename as a slug.
+// This should not be used with the Slug Generator (as it would be redundant)
+func WithOriginalSlug(o string) Option {
+	return func(c *Config) {
+		c.original = slug.Make(o)
+	}
+}
+
+// WithOriginal sets the original filename as a slug, taking the language into account.
+// This should not be used with the Slug Generator (as it would be redundant)
+func WithOriginalSlugLang(o, lang string) Option {
+	return func(c *Config) {
+		c.original = slug.MakeLang(o, lang)
+	}
+}
+
 // WithPrefix sets a prefix for the generated name.
 func WithPrefix(p string) Option {
 	return func(c *Config) {

options_examples_test.go

@@ -0,0 +1,23 @@
+package nomino
+
+import "fmt"
+
+func ExampleWithOriginalSlug() {
+	st, _ := Make(NewConfig(
+		WithOriginalSlug("Hello, World"),
+		WithGenerator(Incremental()),
+	))
+
+	fmt.Println(st)
+	// Output: 0_hello-world.txt
+}
+
+func ExampleWithOriginalSlugLang() {
+	st, _ := Make(NewConfig(
+		WithOriginalSlugLang("Diese & Dass", "de"),
+		WithGenerator(Incremental()),
+	))
+
+	fmt.Println(st)
+	// Output: 0_diese-und-dass.txt
+}