refactor: move selection payload helpers

rust/spikes/leptos-tiptap-spike/src/editor_runtime/dom_selection.rs

@@ -1,8 +1,21 @@
 use leptos_tiptap::TiptapSelectionState;
+use serde::Serialize;
+use serde_json::Value;
+use wasm_bindgen::{JsCast, JsValue};
 use web_sys::{window, Element, Node};
 
 use crate::editor_root_element;
 
+#[derive(Clone, Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub(crate) struct SelectionPayload {
+    pub(crate) selection: TiptapSelectionState,
+    pub(crate) summary: String,
+    pub(crate) editor_focused: bool,
+    pub(crate) current_block_index: Option<usize>,
+    pub(crate) current_block_id: Option<String>,
+}
+
 pub(crate) fn node_is_within_root(node: Node, root: &Element) -> bool {
     let mut current = Some(node);
     while let Some(node) = current {
@@ -103,3 +116,59 @@ pub(crate) fn selection_has_rich_marks(selection: &TiptapSelectionState) -> bool
         || selection.text_style
         || selection.link
 }
+
+pub(crate) fn block_id_from_element(block: &Element) -> Option<String> {
+    block
+        .get_attribute("data-block-id")
+        .map(|value| value.trim().to_string())
+        .filter(|value| !value.is_empty())
+}
+
+pub(crate) fn block_id_from_json_node(node: &Value) -> Option<String> {
+    node.get("attrs")
+        .and_then(|attrs| attrs.get("blockId"))
+        .and_then(Value::as_str)
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .map(str::to_string)
+}
+
+pub(crate) fn runtime_block_id_from_index(index: usize) -> Option<String> {
+    editor_root_element()
+        .and_then(|root| root.children().item(index as u32))
+        .and_then(|block| block_id_from_element(&block))
+        .or_else(|| {
+            editor_root_element()
+                .and_then(|root| {
+                    js_sys::Reflect::get(root.as_ref(), &JsValue::from_str("editor")).ok()
+                })
+                .and_then(|editor_value| {
+                    js_sys::Reflect::get(&editor_value, &JsValue::from_str("getJSON"))
+                        .ok()
+                        .and_then(|callback| callback.dyn_into::<js_sys::Function>().ok())
+                        .and_then(|callback| callback.call0(&editor_value).ok())
+                })
+                .and_then(|value| serde_wasm_bindgen::from_value::<Value>(value).ok())
+                .and_then(|document| {
+                    document
+                        .get("content")
+                        .and_then(Value::as_array)
+                        .and_then(|content| content.get(index))
+                        .and_then(block_id_from_json_node)
+                })
+        })
+}
+
+pub(crate) fn selection_payload(
+    selection: &TiptapSelectionState,
+    editor_focused: bool,
+    current_block_index: Option<usize>,
+) -> SelectionPayload {
+    SelectionPayload {
+        selection: selection.clone(),
+        summary: selection_summary(selection),
+        editor_focused,
+        current_block_index,
+        current_block_id: current_block_index.and_then(runtime_block_id_from_index),
+    }
+}