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backend/node_modules/imapflow/lib/commands/copy.js

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+'use strict';
+
+const { normalizePath, encodePath, expandRange, enhanceCommandError } = require('../tools.js');
+
+// Copies messages from current mailbox to some other mailbox
+module.exports = async (connection, range, destination, options) => {
+    if (connection.state !== connection.states.SELECTED || !range || !destination) {
+        // nothing to do here
+        return;
+    }
+
+    options = options || {};
+    destination = normalizePath(connection, destination);
+
+    let attributes = [
+        { type: 'SEQUENCE', value: range },
+        { type: 'ATOM', value: encodePath(connection, destination) }
+    ];
+
+    let response;
+    try {
+        response = await connection.exec(options.uid ? 'UID COPY' : 'COPY', attributes);
+        response.next();
+
+        let map = { path: connection.mailbox.path, destination };
+        let section = response.response.attributes && response.response.attributes[0] && response.response.attributes[0].section;
+        let responseCode = section && section.length && section[0] && typeof section[0].value === 'string' ? section[0].value : '';
+        switch (responseCode) {
+            case 'COPYUID':
+                {
+                    let uidValidity = section[1] && typeof section[1].value === 'string' && !isNaN(section[1].value) ? BigInt(section[1].value) : false;
+                    if (uidValidity) {
+                        map.uidValidity = uidValidity;
+                    }
+
+                    let sourceUids = section[2] && typeof section[2].value === 'string' ? expandRange(section[2].value) : false;
+                    let destinationUids = section[3] && typeof section[3].value === 'string' ? expandRange(section[3].value) : false;
+                    if (sourceUids && destinationUids && sourceUids.length === destinationUids.length) {
+                        map.uidMap = new Map(sourceUids.map((uid, i) => [uid, destinationUids[i]]));
+                    }
+                }
+                break;
+        }
+
+        return map;
+    } catch (err) {
+        await enhanceCommandError(err);
+        connection.log.warn({ err, cid: connection.id });
+        return false;
+    }
+};