refactor: extract platform media crates

server-rs/crates/platform-hyper3d/src/response/downloads.rs

@@ -0,0 +1,67 @@
+use serde_json::Value;
+
+pub(crate) fn extract_download_files(
+    payload: &Value,
+) -> Vec<shared_contracts::hyper3d::Hyper3dDownloadFilePayload> {
+    let mut files = Vec::new();
+    collect_download_files(payload, &mut files);
+    let mut deduped = Vec::new();
+    for file in files {
+        if !deduped.iter().any(
+            |entry: &shared_contracts::hyper3d::Hyper3dDownloadFilePayload| entry.url == file.url,
+        ) {
+            deduped.push(file);
+        }
+    }
+    deduped
+}
+
+fn collect_download_files(
+    value: &Value,
+    output: &mut Vec<shared_contracts::hyper3d::Hyper3dDownloadFilePayload>,
+) {
+    match value {
+        Value::Object(object) => {
+            let maybe_url = object
+                .get("url")
+                .or_else(|| object.get("download_url"))
+                .or_else(|| object.get("downloadUrl"))
+                .or_else(|| object.get("file_url"))
+                .or_else(|| object.get("fileUrl"))
+                .or_else(|| object.get("signed_url"))
+                .or_else(|| object.get("signedUrl"))
+                .or_else(|| object.get("presigned_url"))
+                .or_else(|| object.get("presignedUrl"))
+                .and_then(Value::as_str)
+                .map(str::trim)
+                .filter(|value| value.starts_with("http://") || value.starts_with("https://"));
+            if let Some(url) = maybe_url {
+                let name = object
+                    .get("name")
+                    .or_else(|| object.get("file_name"))
+                    .or_else(|| object.get("filename"))
+                    .or_else(|| object.get("fileName"))
+                    .or_else(|| object.get("display_name"))
+                    .or_else(|| object.get("displayName"))
+                    .and_then(Value::as_str)
+                    .map(str::trim)
+                    .filter(|value| !value.is_empty())
+                    .unwrap_or("model")
+                    .to_string();
+                output.push(shared_contracts::hyper3d::Hyper3dDownloadFilePayload {
+                    name,
+                    url: url.to_string(),
+                });
+            }
+            for nested in object.values() {
+                collect_download_files(nested, output);
+            }
+        }
+        Value::Array(items) => {
+            for item in items {
+                collect_download_files(item, output);
+            }
+        }
+        _ => {}
+    }
+}