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100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
package templatestrings
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import (
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"errors"
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"io/fs"
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"os"
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"path/filepath"
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"gopkg.in/yaml.v3"
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)
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type TemplateStrings struct {
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templateStrings map[string]map[string]string
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defaultVariant string
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}
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// Load the strings from the specified files into memory
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func InitTemplateStrings(stringsDir string, fileExt string, defaultVariant string, otherVariants ...string) (*TemplateStrings, error) {
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return InitTemplateStringsFS(os.DirFS("."), stringsDir, fileExt, defaultVariant, otherVariants...)
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}
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// Load the strings from the specified files using a file system into memory
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func InitTemplateStringsFS(filesystem fs.FS, stringsDir string, fileExt string, defaultVariant string, otherVariants ...string) (*TemplateStrings, error) {
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ts := &TemplateStrings{
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map[string]map[string]string{},
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defaultVariant,
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}
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// Check directory
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if stat, err := fs.Stat(filesystem, stringsDir); err != nil {
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return nil, err
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} else if !stat.IsDir() {
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return nil, errors.New("specified directory is no dir")
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}
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// Load strings
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variants := append(otherVariants, defaultVariant)
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for _, variant := range variants {
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// Check if variant is empty
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if variant == "" {
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return nil, errors.New("language variant needs to have a name")
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}
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// Check if variant already loaded
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if _, ok := ts.templateStrings[variant]; ok {
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continue
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}
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fb, err := fs.ReadFile(filesystem, filepath.Join(stringsDir, variant+fileExt))
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if err != nil {
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// Just ignore the file
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continue
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}
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variantStrings := map[string]string{}
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if err = yaml.Unmarshal(fb, variantStrings); err != nil {
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// Error loading YAML
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return nil, err
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}
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ts.templateStrings[variant] = variantStrings
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}
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// Checks
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if len(ts.templateStrings) == 0 {
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return nil, errors.New("no variants initialized")
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}
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if _, ok := ts.templateStrings[ts.defaultVariant]; !ok {
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return nil, errors.New("default variant not loaded")
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}
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return ts, nil
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}
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// Get a string
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// input: language, name or just name (uses default language)
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func (ts *TemplateStrings) GetTemplateStringVariant(input ...string) (result string) {
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var lang, name string
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if l := len(input); l == 1 {
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// Use default variant
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lang = ts.defaultVariant
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name = input[0]
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} else if l == 2 {
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// Use specified variant
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lang = input[0]
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name = input[1]
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} else {
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// Wrong number of input strings, return empty string
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return ""
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}
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m, ok := ts.templateStrings[lang]
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if !ok {
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m = ts.templateStrings[ts.defaultVariant]
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}
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result, ok = m[name]
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if !ok {
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result = ts.templateStrings[ts.defaultVariant][name]
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}
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return
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}
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// Get a function to use in templates
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func (ts *TemplateStrings) GetTemplateStringVariantFunc() func(...string) string {
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return func(s ...string) string {
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return ts.GetTemplateStringVariant(s...)
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}
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}
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