Validates that a file upload input contains a valid file with the expected
extension. Checks file structure, minimum size (>500 bytes), and extension
match.
Arguments
- x
Data frame. File upload input from [shiny::fileInput()], containing
columns: `name`, `size`, `type`, `datapath`.
- ext
Character scalar. Expected file extension without the dot
(e.g., `"png"`, `"mp4"`, `"procreate"`). Case-insensitive comparison.
Value
Logical scalar. `TRUE` if file has correct structure, minimum size,
and matching extension; `FALSE` otherwise.
See also
* [validator_step_1()] and [validator_step_2()] which use this function
* [shiny::fileInput()] for file upload input format
Other validation:
validator_step_1(),
validator_step_2()
Examples
if (FALSE) { # \dontrun{
# Check if upload is a PNG file
ckfile(input$image_file, "png")
# Check if upload is a Procreate file
ckfile(input$raw_file, "procreate")
# Check if upload is an MP4 video
ckfile(input$video_file, "mp4")
} # }
