File Size Analyzer Analyze file size with unit conversions and transfer time estimates.

The File Size Analyzer works under the hood by accessing file metadata properties through the File API, specifically name, size, type, and lastModified, without reading any file content. It uses binary units for size conversions, where 1 kilobyte equals 1024 bytes, consistent with how operating systems report file sizes. When a file is dropped into the FileDropzone component, the onFile callback function calculates the transfer times using the formula time = (file_size_bits) / (connection_speed_bps), where connection speeds are predefined in an array of objects, including 3G, 4G, 5G, WiFi, Broadband, and Gigabit. This calculation relies on the JavaScript Math object for rounding and formatting numbers.

The formatTransferTime function formats these calculated times into human-readable units such as milliseconds, seconds, minutes, or hours by checking if the time is less than 1 second, less than 60 seconds, less than 3600 seconds, and then returning the corresponding formatted string. The analyzer's calculations also rely on the Date object to format the lastModified property into a locale-specific string using the toLocaleString method. The JavaScript toString method is used to convert the file size from bytes to bits, which is then used in the transfer time calculations by multiplying the file size in bytes by 8 to get the total number of bits.

The SizeAnalysis object contains properties such as name, size, type, and lastModified, as well as additional properties like binarySize, which represents the size of the file in bits. The formatFileSize function from the utils library uses a combination of arithmetic operations to convert file sizes into human-readable formats, such as kilobytes or megabytes. The transfer time calculations are performed using an array of connection speed objects, each containing a speed property and a bitsPerSecond property, which represents the connection speed in bits per second.

The analyzer's use of React components enables efficient rendering of complex user interfaces, with the table layout displaying estimated transfer times for different connection speeds in a clear and concise manner. The lastModified property is formatted into a locale-specific string using the Date object's toLocaleString method, allowing for easy display and comparison of file modification dates. The analyzer calculates the estimated transfer time for each connection speed and formats the result into a human-readable string, which is then displayed in a table with each row representing a different connection speed.

The FileDropzone component handles file uploads using the HTML5 Drag and Drop API, allowing users to easily drop files into the analyzer for instant analysis. The React components work together to provide an efficient and user-friendly interface for analyzing file sizes and estimated transfer times, with the useState hook storing the analysis results in memory and the useCallback hook preventing unnecessary re-renders. The JavaScript Math object is used extensively throughout the calculations, providing functions such as round and toFixed for formatting numbers.

The analyzer's use of binary units for size conversions ensures accuracy and consistency with how operating systems report file sizes. The formatTransferTime function plays a crucial role in formatting the calculated transfer times into human-readable units, making it easier for users to understand and compare the estimated transfer times for different connection speeds. The SizeAnalysis object provides a comprehensive overview of the analyzed file's properties, including its size, type, last modified date, and binary size, allowing users to make informed decisions about data storage and transmission.

The analyzer's calculations are based on the file's size in bytes, which is then converted to bits using the toString method, providing an accurate representation of the file's size in different units. The connection speeds used in the transfer time calculations are predefined in an array of objects, allowing for easy modification or addition of new connection speeds as needed. This approach enables the analyzer to provide a flexible and efficient solution for analyzing file sizes and estimated transfer times, making it a valuable tool for developers and system administrators alike.