Filename as a schema field

[JasonWeise]

I am desperately trying to find a way to place the filename for the uploaded document as a field in the schema. Does anyone have any idea how to acheive this.
I'd like the user to select the file from autoform as usual and the filename from the selected file inserted into the relevant field.
Example schema..

Manual = new Mongo.Collection("manuals");
Manual.attachSchema(new SimpleSchema({
    section: {
        type: String,
        optional: false,
        label: "Section",
        allowedValues: ['Safety', 'Emergency Information']
    },originalfilename: {
        type: String,            <<--------------- I'd like to get the filename of the selected file into here
        optional: false,
        label: "Original Filename",
    },
    date:{
        type: Date,
        optional: false,
        label: "Date Updated",
        autoform: {
            type: 'hidden',
        },
        autoValue: function() {
            if (this.isInsert) {
                return new Date();
            } else if (this.isUpsert) {
                return {
                    $setOnInsert: new Date()
                };
            }else if (this.isUpdate) {
                return new Date();
            } else {
                this.unset();
            }
        }
    },
    document: {
        type: String,
        optional: false,
        autoform: {
            afFieldInput: {
                type: 'fileUpload',
                collection: 'Documents',
                label: 'Choose file',
                accept: '.pdf'
            }
        }
    }

If anyone has any idea that would be great... thanks heaps in advance.