updates

directory/update.go

@@ -0,0 +1,130 @@
+package directory
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"github.com/hacdias/caddy-filemanager/config"
+	"github.com/spf13/hugo/parser"
+)
+
+// Update is used to update a file that was edited
+func (i *Info) Update(w http.ResponseWriter, r *http.Request, c *config.Config) (int, error) {
+	var data map[string]interface{}
+	kind := r.Header.Get("kind")
+
+	if kind == "" {
+		return http.StatusBadRequest, nil
+	}
+
+	// Get the JSON information
+	rawBuffer := new(bytes.Buffer)
+	rawBuffer.ReadFrom(r.Body)
+	err := json.Unmarshal(rawBuffer.Bytes(), &data)
+
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	var file []byte
+	var code int
+
+	switch kind {
+	case "frontmatter-only":
+		if file, code, err = parseFrontMatterOnlyFile(data, i.Name); err != nil {
+			return http.StatusInternalServerError, err
+		}
+	case "content-only":
+		mainContent := data["content"].(string)
+		mainContent = strings.TrimSpace(mainContent)
+		file = []byte(mainContent)
+	case "complete":
+		if file, code, err = parseCompleteFile(data, i.Name); err != nil {
+			return http.StatusInternalServerError, err
+		}
+	default:
+		return http.StatusBadRequest, nil
+	}
+
+	// Write the file
+	err = ioutil.WriteFile(i.Path, file, 0666)
+
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	return code, nil
+}
+
+func parseFrontMatterOnlyFile(data interface{}, filename string) ([]byte, int, error) {
+	frontmatter := strings.TrimPrefix(filepath.Ext(filename), ".")
+	var mark rune
+
+	switch frontmatter {
+	case "toml":
+		mark = rune('+')
+	case "json":
+		mark = rune('{')
+	case "yaml":
+		mark = rune('-')
+	default:
+		return []byte{}, http.StatusBadRequest, errors.New("Can't define the frontmatter.")
+	}
+
+	f, err := parser.InterfaceToFrontMatter(data, mark)
+	fString := string(f)
+
+	// If it's toml or yaml, strip frontmatter identifier
+	if frontmatter == "toml" {
+		fString = strings.TrimSuffix(fString, "+++\n")
+		fString = strings.TrimPrefix(fString, "+++\n")
+	}
+
+	if frontmatter == "yaml" {
+		fString = strings.TrimSuffix(fString, "---\n")
+		fString = strings.TrimPrefix(fString, "---\n")
+	}
+
+	f = []byte(fString)
+
+	if err != nil {
+		return []byte{}, http.StatusInternalServerError, err
+	}
+
+	return f, http.StatusOK, nil
+}
+
+func parseCompleteFile(data map[string]interface{}, filename string) ([]byte, int, error) {
+	// The main content of the file
+	mainContent := data["content"].(string)
+	mainContent = "\n\n" + strings.TrimSpace(mainContent) + "\n"
+
+	// Removes the main content from the rest of the frontmatter
+	delete(data, "content")
+
+	if _, ok := data["date"]; ok {
+		data["date"] = data["date"].(string) + ":00"
+	}
+
+	// Converts the frontmatter in JSON
+	jsonFrontmatter, err := json.Marshal(data)
+
+	if err != nil {
+		return []byte{}, http.StatusInternalServerError, err
+	}
+
+	// Indents the json
+	frontMatterBuffer := new(bytes.Buffer)
+	json.Indent(frontMatterBuffer, jsonFrontmatter, "", "  ")
+
+	// Generates the final file
+	f := new(bytes.Buffer)
+	f.Write(frontMatterBuffer.Bytes())
+	f.Write([]byte(mainContent))
+	return f.Bytes(), http.StatusOK, nil
+}