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refactor podcast schema and generate unique episode paths (#373)
closes #350
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // TODO: this package shouldn't really exist. we can usually just attempt our normal filesystem operations | ||
| // and handle errors atomically. eg. | ||
| // - Safe could instead be try create file, handle error | ||
| // - Unique could be try create file, on err create file (1), etc | ||
| package fileutil | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
| "regexp" | ||
| "strings" | ||
| ) | ||
|
|
||
| var nonAlphaNumExpr = regexp.MustCompile("[^a-zA-Z0-9_.]+") | ||
|
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| func Safe(filename string) string { | ||
| filename = nonAlphaNumExpr.ReplaceAllString(filename, "") | ||
| return filename | ||
| } | ||
|
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||
| // try to find a unqiue file (or dir) name. incrementing like "example (1)" | ||
| func Unique(base, filename string) (string, error) { | ||
| return unique(base, filename, 0) | ||
| } | ||
|
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||
| func unique(base, filename string, count uint) (string, error) { | ||
| var suffix string | ||
| if count > 0 { | ||
| suffix = fmt.Sprintf(" (%d)", count) | ||
| } | ||
| path := base + suffix | ||
| if filename != "" { | ||
| noExt := strings.TrimSuffix(filename, filepath.Ext(filename)) | ||
| path = filepath.Join(base, noExt+suffix+filepath.Ext(filename)) | ||
| } | ||
| _, err := os.Stat(path) | ||
| if os.IsNotExist(err) { | ||
| return path, nil | ||
| } | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return unique(base, filename, count+1) | ||
| } | ||
|
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||
| func First(path ...string) (string, error) { | ||
| var err error | ||
| for _, p := range path { | ||
| _, err = os.Stat(p) | ||
| if err == nil { | ||
| return p, nil | ||
| } | ||
| } | ||
| return "", err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| package fileutil | ||
|
|
||
| import ( | ||
| "os" | ||
| "path/filepath" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestUniquePath(t *testing.T) { | ||
| unq := func(base, filename string, count uint) string { | ||
| r, err := unique(base, filename, count) | ||
| require.NoError(t, err) | ||
| return r | ||
| } | ||
|
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||
| require.Equal(t, "test/wow.mp3", unq("test", "wow.mp3", 0)) | ||
| require.Equal(t, "test/wow (1).mp3", unq("test", "wow.mp3", 1)) | ||
| require.Equal(t, "test/wow (2).mp3", unq("test", "wow.mp3", 2)) | ||
|
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| require.Equal(t, "test", unq("test", "", 0)) | ||
| require.Equal(t, "test (1)", unq("test", "", 1)) | ||
|
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| base := filepath.Join(t.TempDir(), "a") | ||
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| require.NoError(t, os.MkdirAll(base, os.ModePerm)) | ||
|
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| next := base + " (1)" | ||
| require.Equal(t, next, unq(base, "", 0)) | ||
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| require.NoError(t, os.MkdirAll(next, os.ModePerm)) | ||
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| next = base + " (2)" | ||
| require.Equal(t, next, unq(base, "", 0)) | ||
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| _, err := os.Create(filepath.Join(base, "test.mp3")) | ||
| require.NoError(t, err) | ||
| require.Equal(t, filepath.Join(base, "test (1).mp3"), unq(base, "test.mp3", 0)) | ||
| } | ||
|
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| func TestFirst(t *testing.T) { | ||
| base := t.TempDir() | ||
| name := filepath.Join(base, "test") | ||
| _, err := os.Create(name) | ||
| require.NoError(t, err) | ||
|
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| p := func(name string) string { | ||
| return filepath.Join(base, name) | ||
| } | ||
|
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| r, err := First(p("one"), p("two"), p("test"), p("four")) | ||
| require.NoError(t, err) | ||
| require.Equal(t, p("test"), r) | ||
|
|
||
| } |
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