paiagram/rw_data/
write.rs

1#[cfg(not(target_arch = "wasm32"))]
2pub fn write_text_file(data: &str, filename: &str) -> Result<(), std::io::Error> {
3    let mut save_dialog = rfd::FileDialog::new();
4    save_dialog = save_dialog.set_file_name(filename);
5    if let Some(path) = save_dialog.save_file() {
6        std::fs::write(&path, data)?;
7        bevy::log::info!("File saved to {:?}", path);
8    }
9    Ok(())
10}
11
12/// let the browser download a text file
13#[cfg(target_arch = "wasm32")]
14pub fn write_text_file(data: &str, filename: &str) -> Result<(), String> {
15    use wasm_bindgen::JsCast;
16    use web_sys::{Blob, BlobPropertyBag, Url};
17
18    let window = web_sys::window().ok_or("no global window found")?;
19    let document = window
20        .document()
21        .ok_or("should have a document on window")?;
22    let body = document.body().ok_or("document should have a body")?;
23
24    // 1. Create a Blob from the string data
25    let mut properties = BlobPropertyBag::new();
26    properties.type_("text/plain");
27
28    let data_array = js_sys::Array::of1(&wasm_bindgen::JsValue::from_str(data));
29    let blob = Blob::new_with_str_sequence_and_options(&data_array, &properties)
30        .map_err(|e| format!("Failed to create blob: {:?}", e))?;
31
32    // 2. Create a temporary URL for the blob
33    let url = Url::create_object_url_with_blob(&blob)
34        .map_err(|e| format!("Failed to create URL: {:?}", e))?;
35
36    // 3. Create a hidden <a> element
37    let anchor = document
38        .create_element("a")
39        .map_err(|e| format!("Failed to create anchor: {:?}", e))?
40        .dyn_into::<web_sys::HtmlAnchorElement>()
41        .map_err(|e| format!("Failed to cast to anchor: {:?}", e))?;
42
43    anchor.set_href(&url);
44    anchor.set_download(filename);
45
46    // 4. Append, click, and remove the anchor
47    body.append_child(&anchor)
48        .map_err(|e| format!("Failed to append anchor: {:?}", e))?;
49    anchor.click();
50    body.remove_child(&anchor)
51        .map_err(|e| format!("Failed to remove anchor: {:?}", e))?;
52
53    // 5. Clean up the URL
54    Url::revoke_object_url(&url).map_err(|e| format!("Failed to revoke URL: {:?}", e))?;
55
56    Ok(())
57}
paiagram/rw_data/write.rs

paiagram/rw_data/
write.rs
