1 files changed, 24 insertions, 0 deletions
diff --git a/ext/bg/js/util.js b/ext/bg/js/util.js
index 4e0cc671..888bcb33 100644
--- a/ext/bg/js/util.js
+++ b/ext/bg/js/util.js
@@ -116,3 +116,27 @@ function applyTagMeta(tag, meta) {
 function splitField(field) {
     return field.length === 0 ? [] : field.split(' ');
 }
+
+function importJsonDb(indexUrl, entitiesLoaded, entriesLoaded) {
+    const indexDir = indexUrl.slice(0, indexUrl.lastIndexOf('/'));
+    return loadJson(indexUrl).then(index => {
+        if (entitiesLoaded !== null) {
+            return entitiesLoaded(index.entities, index.banks).then(() => index);
+        }
+
+        return index;
+    }).then(index => {
+        const loaders = [];
+        for (let i = 1; i <= index.banks; ++i) {
+            const bankUrl = `${indexDir}/bank_${i}.json`;
+            loaders.push(() => loadJson(bankUrl).then(entries => entriesLoaded(entries, index.banks, i)));
+        }
+
+        let chain = Promise.resolve();
+        for (const loader of loaders) {
+            chain = chain.then(loader);
+        }
+
+        return chain;
+    });
+}