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node_modules/mongoose/lib/helpers/update/castArrayFilters.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const castFilterPath = require('../query/castFilterPath');
+const modifiedPaths = require('./modifiedPaths');
+
+module.exports = function castArrayFilters(query) {
+  const arrayFilters = query.options.arrayFilters;
+  if (!Array.isArray(arrayFilters)) {
+    return;
+  }
+
+  const update = query.getUpdate();
+  const schema = query.schema;
+
+  const updatedPaths = modifiedPaths(update);
+
+  const updatedPathsByFilter = Object.keys(updatedPaths).reduce((cur, path) => {
+    const matches = path.match(/\$\[[^\]]+\]/g);
+    if (matches == null) {
+      return cur;
+    }
+    for (const match of matches) {
+      const firstMatch = path.indexOf(match);
+      if (firstMatch !== path.lastIndexOf(match)) {
+        throw new Error(`Path '${path}' contains the same array filter multiple times`);
+      }
+      cur[match.substring(2, match.length - 1)] = path.substr(0, firstMatch - 1);
+    }
+    return cur;
+  }, {});
+
+  for (const filter of arrayFilters) {
+    if (filter == null) {
+      throw new Error(`Got null array filter in ${arrayFilters}`);
+    }
+    const firstKey = Object.keys(filter)[0];
+
+    if (filter[firstKey] == null) {
+      continue;
+    }
+
+    const dot = firstKey.indexOf('.');
+    let filterPath = dot === -1 ?
+      updatedPathsByFilter[firstKey] + '.0' :
+      updatedPathsByFilter[firstKey.substr(0, dot)] + '.0' + firstKey.substr(dot);
+
+    if (filterPath == null) {
+      throw new Error(`Filter path not found for ${firstKey}`);
+    }
+
+    // If there are multiple array filters in the path being updated, make sure
+    // to replace them so we can get the schema path.
+    filterPath = filterPath.replace(/\$\[[^\]]+\]/g, '0');
+
+    const schematype = schema.path(filterPath);
+    if (typeof filter[firstKey] === 'object') {
+      filter[firstKey] = castFilterPath(query, schematype, filter[firstKey]);
+    } else {
+      filter[firstKey] = schematype.castForQuery(filter[firstKey]);
+    }
+  }
+};