feat: link public folders to office viewer

internal/handler/node.go

@@ -7,6 +7,7 @@ import (
 	"html"
 	"io"
 	"net/http"
+	"net/url"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -398,6 +399,12 @@ func (h *NodeHandler) PublicChildMeta(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	token := chi.URLParam(r, "token")
+	if node.NodeType == model.NodeTypeOfficeDocument {
+		if officeID := officeIDFromNode(node); officeID != "" {
+			http.Redirect(w, r, h.publicOfficeURL(token, node.ID, officeID), http.StatusFound)
+			return
+		}
+	}
 	if node.NodeType == model.NodeTypeFile {
 		h.renderPublicPreview(w, node, h.publicNodeURL(token, node.ID)+"/download")
 		return
@@ -414,6 +421,23 @@ func (h *NodeHandler) PublicChildMeta(w http.ResponseWriter, r *http.Request) {
 	h.renderPublicUnavailable(w, node)
 }
 
+func (h *NodeHandler) PublicOfficeInfo(w http.ResponseWriter, r *http.Request) {
+	node, ok := h.publicNodeByID(w, r)
+	if !ok {
+		return
+	}
+	officeID := officeIDFromNode(node)
+	if node.NodeType != model.NodeTypeOfficeDocument || officeID == "" {
+		writeError(w, http.StatusBadRequest, "node is not an office document")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]string{
+		"node_id":   node.ID,
+		"office_id": officeID,
+		"title":     node.Title,
+	})
+}
+
 func (h *NodeHandler) PublicChildDownload(w http.ResponseWriter, r *http.Request) {
 	node, ok := h.publicNodeByID(w, r)
 	if !ok {
@@ -552,6 +576,11 @@ func (h *NodeHandler) renderPublicFolder(w http.ResponseWriter, r *http.Request,
 			}
 			kind := publicKind(child)
 			href := h.publicNodeURL(token, child.ID)
+			if child.NodeType == model.NodeTypeOfficeDocument {
+				if officeID := officeIDFromNode(&child); officeID != "" {
+					href = h.publicOfficeURL(token, child.ID, officeID)
+				}
+			}
 			b.WriteString(`<a class="item" href="` + html.EscapeString(href) + `">`)
 			b.WriteString(`<span class="badge">` + html.EscapeString(kind) + `</span>`)
 			b.WriteString(`<span class="title">` + html.EscapeString(title) + `</span>`)
@@ -619,6 +648,23 @@ func (h *NodeHandler) publicNodeURL(token, nodeID string) string {
 	return h.publicURL(token) + "/nodes/" + nodeID
 }
 
+func (h *NodeHandler) publicOfficeURL(token, nodeID, officeID string) string {
+	values := url.Values{}
+	values.Set("files_token", token)
+	values.Set("node_id", nodeID)
+	return strings.TrimRight(h.cfg.PublicBaseURL, "/") + "/office/public/" + url.PathEscape(officeID) + "?" + values.Encode()
+}
+
+func officeIDFromNode(node *model.Node) string {
+	if node == nil || node.ExternalURL == nil {
+		return ""
+	}
+	if match := strings.TrimPrefix(*node.ExternalURL, "/office/"); match != *node.ExternalURL {
+		return strings.TrimSpace(match)
+	}
+	return ""
+}
+
 func publicKind(node model.Node) string {
 	switch node.NodeType {
 	case model.NodeTypeFolder: