File size: 2,525 Bytes
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server <- function(input, output, session) {
# Reactive variable to store the original file content
originalFileContent <- reactiveVal()
# Observe file upload
observeEvent(input$file1, {
req(input$file1)
# Read the file content
fileContent <- readLines(input$file1$datapath)
# Store the original file content
originalFileContent(fileContent)
# Update Ace editor with file content
updateAceEditor(session, "code", value = paste(fileContent, collapse = "\n"), theme = "monokai")
})
# Function to generate YAML header
generate_yaml <- function() {
yaml_header <- c(
"---",
paste0("author: ", input$author),
paste0("date: ", if(input$date_type == 'custom') {input$date} else {'"`r Sys.Date()`"'}),
paste0("description: ", input$description),
"format:",
" html:",
paste0(" highlight-style: ", input$highlight_style),
paste0(" theme: ", input$theme),
paste0(" toc: ", ifelse(input$toc, "true", "false")),
" code-fold: true",
paste0(" file: ", tools::file_path_sans_ext(input$file1$name), ".", tools::file_ext(input$file1$name)),
paste0(" title: ", input$title),
paste0(' subtitle: "', input$subtitle, '"')
)
if (input$`toc-float`) {
yaml_header <- c(yaml_header,
" toc_float:",
" collapsed: true",
" smooth_scroll: true")
}
yaml_header <- c(yaml_header, "---")
return(yaml_header)
}
# Observe generate button
observeEvent(input$generate, {
# Generate YAML header
yaml_header <- generate_yaml()
# Combine YAML header and original file content
new_fileContent <- c(yaml_header, originalFileContent())
# Update Ace editor with new file content
updateAceEditor(session, "code", value = paste(new_fileContent, collapse = "\n"))
})
# Download handler
output$Download <- downloadHandler(
filename = function() {
paste(tools::file_path_sans_ext(input$file1$name), ".", tools::file_ext(input$file1$name), sep = "")
},
content = function(file) {
# Generate YAML header
yaml_header <- generate_yaml()
# Combine YAML header and original file content
new_fileContent <- c(yaml_header, originalFileContent())
# Write the new file content to the file
writeLines(new_fileContent, file)
}
)
} |