openapi-node-function-template/FunctionContext.js at master · seges/openapi-node-function-template · GitHub

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class FunctionContext {
    constructor(cb) {
        this.value = 200;
        this.cb = cb(this);
        this.headerValues = {};
    }

    status(value) {
        if(!value) {
            return this.value;
        }

        this.value = value;
        return this;
    }

    headers(value) {
        if(!value) {
            return this.headerValues;
        }

        this.headerValues = value;
        return this;
    }

    succeed(value) {
        let err;
        this.cb(err, value);
    }

    fail(value) {
        let message;
        this.cb(value, message);
    }

    attachment(fileName, writeStream) {
        let err;

        // Creating a tagged data type here, to be able to choose a proper action in handler (cb).
        this.cb(err, {
            type: 'attachment',
            fileName,
            writeStream
        })
    }
}

module.exports = FunctionContext;