117 lines
2.8 KiB
Go
117 lines
2.8 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package prosemirror
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import (
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"encoding/json"
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"fmt"
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"strings"
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)
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// ValidateDocumentContentJSON returns nil if s is empty or whitespace-only.
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// Otherwise s must be valid ProseMirror JSON whose root node has type "doc".
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func ValidateDocumentContentJSON(s string) error {
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if strings.TrimSpace(s) == "" {
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return nil
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}
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_, err := parseDocRoot(s)
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return err
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}
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func parseDocRoot(s string) (Node, error) {
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n, err := Parse(s)
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if err != nil {
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return Node{}, fmt.Errorf("cannot parse document content as ProseMirror JSON: %w", err)
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}
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if n.Type != NodeDoc {
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return Node{}, fmt.Errorf("document content root must be type %q", NodeDoc)
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}
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return n, nil
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}
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// SanitizeDocumentJSON parses a ProseMirror/Tiptap JSON document, replaces
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// unsafe link mark href values using the same rules as RenderHTML, and
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// re-serializes the document. Whitespace-only input is returned unchanged.
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// Non-empty content must be valid JSON whose root node has type "doc".
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func SanitizeDocumentJSON(s string) (string, error) {
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if strings.TrimSpace(s) == "" {
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return s, nil
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}
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n, err := parseDocRoot(s)
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if err != nil {
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return "", err
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}
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sanitizeNode(&n)
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out, err := json.Marshal(n)
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if err != nil {
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return "", fmt.Errorf("cannot marshal sanitized document: %w", err)
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}
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return string(out), nil
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}
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func sanitizeNode(n *Node) {
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if n.Type == NodeImage {
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sanitizeImageNode(n)
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}
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for i := range n.Marks {
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sanitizeLinkMark(&n.Marks[i])
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}
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for i := range n.Content {
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sanitizeNode(&n.Content[i])
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}
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}
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func sanitizeImageNode(n *Node) {
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attrs, err := n.ImageAttrs()
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if err != nil {
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n.Attrs = []byte(`{"src":""}`)
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return
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}
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attrs.Src = safeImageSrc(attrs.Src)
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raw, err := json.Marshal(attrs)
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if err != nil {
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n.Attrs = []byte(`{"src":""}`)
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return
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}
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n.Attrs = raw
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}
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func sanitizeLinkMark(m *Mark) {
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if m.Type != MarkLink {
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return
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}
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attrs, err := m.LinkAttrs()
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if err != nil {
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m.Attrs = []byte(`{"href":"#"}`)
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return
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}
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attrs.Href = safeLinkHref(attrs.Href)
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raw, err := json.Marshal(attrs)
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if err != nil {
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m.Attrs = []byte(`{"href":"#"}`)
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return
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}
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m.Attrs = raw
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}
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