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node_modules/mongodb/lib/read_concern.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ReadConcern = exports.ReadConcernLevel = void 0;
+/** @public */
+exports.ReadConcernLevel = Object.freeze({
+    local: 'local',
+    majority: 'majority',
+    linearizable: 'linearizable',
+    available: 'available',
+    snapshot: 'snapshot'
+});
+/**
+ * The MongoDB ReadConcern, which allows for control of the consistency and isolation properties
+ * of the data read from replica sets and replica set shards.
+ * @public
+ *
+ * @see https://www.mongodb.com/docs/manual/reference/read-concern/index.html
+ */
+class ReadConcern {
+    /** Constructs a ReadConcern from the read concern level.*/
+    constructor(level) {
+        /**
+         * A spec test exists that allows level to be any string.
+         * "invalid readConcern with out stage"
+         * @see ./test/spec/crud/v2/aggregate-out-readConcern.json
+         * @see https://github.com/mongodb/specifications/blob/master/source/read-write-concern/read-write-concern.rst#unknown-levels-and-additional-options-for-string-based-readconcerns
+         */
+        this.level = exports.ReadConcernLevel[level] ?? level;
+    }
+    /**
+     * Construct a ReadConcern given an options object.
+     *
+     * @param options - The options object from which to extract the write concern.
+     */
+    static fromOptions(options) {
+        if (options == null) {
+            return;
+        }
+        if (options.readConcern) {
+            const { readConcern } = options;
+            if (readConcern instanceof ReadConcern) {
+                return readConcern;
+            }
+            else if (typeof readConcern === 'string') {
+                return new ReadConcern(readConcern);
+            }
+            else if ('level' in readConcern && readConcern.level) {
+                return new ReadConcern(readConcern.level);
+            }
+        }
+        if (options.level) {
+            return new ReadConcern(options.level);
+        }
+        return;
+    }
+    static get MAJORITY() {
+        return exports.ReadConcernLevel.majority;
+    }
+    static get AVAILABLE() {
+        return exports.ReadConcernLevel.available;
+    }
+    static get LINEARIZABLE() {
+        return exports.ReadConcernLevel.linearizable;
+    }
+    static get SNAPSHOT() {
+        return exports.ReadConcernLevel.snapshot;
+    }
+    toJSON() {
+        return { level: this.level };
+    }
+}
+exports.ReadConcern = ReadConcern;
+//# sourceMappingURL=read_concern.js.map