first version

data/json/json.go

@@ -0,0 +1,80 @@
+package json
+
+import (
+	"encoding/json"
+	"os"
+	"retroHub/data"
+)
+
+type FileProvider struct {
+	categories []category
+}
+
+type fileContent struct {
+	Categories []category `json:"categories"`
+}
+
+type category struct {
+	T  string `json:"title"`
+	Ls []link `json:"links"`
+}
+
+func (c category) Title() string {
+	return c.T
+}
+
+func (c category) Links() []data.Link {
+	var r []data.Link
+	for _, l := range c.Ls {
+		r = append(r, data.Link(l))
+	}
+	return r
+}
+
+type link struct {
+	T string `json:"title"`
+	U string `json:"url"`
+	D string `json:"description"`
+}
+
+func (l link) Title() string {
+	return l.T
+}
+
+func (l link) URL() string {
+	return l.U
+}
+
+func (l link) Description() string {
+	return l.D
+}
+
+func (jfp *FileProvider) Categories() []data.Category {
+	var r []data.Category
+	for _, c := range jfp.categories {
+		r = append(r, data.Category(c))
+	}
+	return r
+}
+
+func New(fp string) (*FileProvider, error) {
+	if _, err := os.Stat(fp); err != nil {
+		return nil, err
+	}
+
+	content, err := os.ReadFile(fp)
+	if err != nil {
+		return nil, err
+	}
+
+	var c fileContent
+	err = json.Unmarshal(content, &c)
+	if err != nil {
+		return nil, err
+	}
+
+	jfp := new(FileProvider)
+	jfp.categories = c.Categories
+
+	return jfp, nil
+}