Load attachment data before sending message
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parent
1c8123ff1a
commit
9a540d6d18
2 changed files with 36 additions and 1 deletions
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@ -1,3 +1,4 @@
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const isFunction = require('lodash/isFunction');
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const isString = require('lodash/isString');
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const MIME = require('./mime');
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@ -110,3 +111,34 @@ exports.removeSchemaVersion = (attachment) => {
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};
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exports.migrateDataToFileSystem = migrateDataToFileSystem;
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// hasData :: Attachment -> Boolean
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exports.hasData = attachment =>
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attachment.data instanceof ArrayBuffer || ArrayBuffer.isView(attachment.data);
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// loadData :: (RelativePath -> IO (Promise ArrayBuffer))
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// Attachment ->
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// IO (Promise Attachment)
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exports.loadData = (readAttachmentData) => {
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if (!isFunction(readAttachmentData)) {
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throw new TypeError('`readAttachmentData` must be a function');
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}
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return async (attachment) => {
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if (!exports.isValid(attachment)) {
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throw new TypeError('`attachment` is not valid');
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}
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const isAlreadyLoaded = exports.hasData(attachment);
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if (isAlreadyLoaded) {
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return attachment;
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}
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if (!isString(attachment.path)) {
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throw new TypeError('`attachment.path` is required');
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}
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const data = await readAttachmentData(attachment.path);
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return Object.assign({}, attachment, { data });
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};
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};
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