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library(shiny)
library(readxl)
library(stringr)
library(openxlsx)
library(shinythemes)
server <- function(input, output) {
# Store the original file content
originalFileContent <- reactiveVal(NULL)
observeEvent(input$file, {
req(input$file) # Read the file content
file_type <- switch(input$file_type,
"CSV" = "csv",
"XLSX" = "xlsx",
"TXT" = 'txt')
data_sheet <- tryCatch(
switch(file_type,
"csv" = {
sep <- if (input$csv_sep != "Other") input$csv_sep else input$csv_other
read.csv(input$file$datapath, sep = sep)
},
"xlsx" = {
tryCatch(
read_xlsx(input$file$datapath, sheet = input$excel_sheet),
error = function(e) {
showModal(modalDialog(
title = "Error",
"La hoja de Excel especificada no existe en el archivo subido. Por favor, selecciona una hoja válida.",
easyClose = TRUE
))
return(NULL)
}
)
},
"txt" = {
readLines(input$file$datapath)
}
),
error = function(e) {
showModal(modalDialog(
title = "Error",
"El archivo no se pudo leer. Por favor, verifica que el archivo sea válido y que el tipo de archivo seleccionado sea correcto.",
easyClose = TRUE
))
return(NULL)
}
)
file_ext <- tools::file_ext(input$file$name)
if (tolower(file_ext) != tolower(input$file_type)) {
showModal(modalDialog(
title = "Error",
"The file extension does not match the selected file type. Please select the correct file type or upload a file with the correct extension.",
easyClose = TRUE
))
return()
}
email_pattern <- "([_a-z0-9-]+(?:\\.[_a-z0-9-]+)*@[a-z0-9-]+(?:\\.[a-z0-9-]+)*(?:\\.[a-z]{2,63}))"
correos <- c()
switch(file_type,
"csv" = {
data_sheet <- read.csv(input$file$datapath, sep = sep)
#crete checkbox group
output$checkbox_group <- renderUI({
checkboxGroupInput("columns", "Select columns:", choices = names(data_sheet))
})
observeEvent(input$columns, {
req(input$columns)
for (col_name in input$columns) {
correos_raw <- na.omit(as.character(data_sheet[[col_name]]))
for (entry in correos_raw) {
correos_found <- str_extract_all(entry, email_pattern)[[1]]
correos <- unique(c(correos, correos_found))
}
}
originalFileContent(correos)
output$contents <- renderTable({
data.frame(Content = originalFileContent())
})
})
},
"xlsx" = {
data_sheet <- read_xlsx(input$file$datapath, sheet = input$excel_sheet)
#crete checkbox group
output$checkbox_group <- renderUI({
checkboxGroupInput("columns", "Select columns:", choices = names(data_sheet))
})
observeEvent(input$columns, {
req(input$columns)
for (col_name in input$columns) {
correos_raw <- na.omit(as.character(data_sheet[[col_name]]))
for (entry in correos_raw) {
correos_found <- str_extract_all(entry, email_pattern)[[1]]
correos <- unique(c(correos, correos_found))
}
}
originalFileContent(correos)
output$contents <- renderTable({
data.frame(Content = originalFileContent())
})
})
},
"txt" = {
data_sheet <- readLines(input$file$datapath)
emails <- unlist(regmatches(data_sheet, gregexpr(email_pattern, data_sheet)))
originalFileContent(unique(emails))
output$contents <- renderTable({
data.frame(Content = originalFileContent())
})
}
)
save_file <- function() {
file.copy(input$file$datapath, "/home/juan/Desktop/shiny_email")
}
output$Download <- downloadHandler(
filename = function() {
paste(tools::file_path_sans_ext(input$file$name), "_emails", ".xlsx", sep = "")
},
content = function(file) {
emails_df <- data.frame(Emails = as.character(originalFileContent()))
write.xlsx(emails_df, file)
}
)
output$Download2 <- downloadHandler(
filename = function() {
paste(tools::file_path_sans_ext(input$file$name), "_emails", ".txt", sep = "")
},
content = function(file) {
write.table(originalFileContent(), file)
}
)
}) # End of observeEvent of file upload
} # End of server function |