68 lines
1.6 KiB
JavaScript
68 lines
1.6 KiB
JavaScript
var objectAssign = require('object-assign')
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function arrayRemove (arr, item) {
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var idx = arr.indexOf(item)
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if (~idx) arr.splice(idx, 1)
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}
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function FileAppender (strategy, req) {
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this.strategy = strategy
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this.req = req
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switch (strategy) {
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case 'NONE': break
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case 'VALUE': break
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case 'ARRAY': req.files = []; break
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case 'OBJECT': req.files = Object.create(null); break
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default: throw new Error('Unknown file strategy: ' + strategy)
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}
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}
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FileAppender.prototype.insertPlaceholder = function (file) {
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var placeholder = {
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fieldname: file.fieldname
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}
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switch (this.strategy) {
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case 'NONE': break
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case 'VALUE': break
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case 'ARRAY': this.req.files.push(placeholder); break
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case 'OBJECT':
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if (this.req.files[file.fieldname]) {
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this.req.files[file.fieldname].push(placeholder)
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} else {
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this.req.files[file.fieldname] = [placeholder]
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}
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break
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}
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return placeholder
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}
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FileAppender.prototype.removePlaceholder = function (placeholder) {
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switch (this.strategy) {
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case 'NONE': break
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case 'VALUE': break
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case 'ARRAY': arrayRemove(this.req.files, placeholder); break
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case 'OBJECT':
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if (this.req.files[placeholder.fieldname].length === 1) {
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delete this.req.files[placeholder.fieldname]
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} else {
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arrayRemove(this.req.files[placeholder.fieldname], placeholder)
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}
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break
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}
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}
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FileAppender.prototype.replacePlaceholder = function (placeholder, file) {
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if (this.strategy === 'VALUE') {
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this.req.file = file
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return
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}
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delete placeholder.fieldname
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objectAssign(placeholder, file)
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}
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module.exports = FileAppender
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