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library(shiny)
library(bs4Dash)
library(leaflet)
library(highcharter)
library(reactable)
library(reactablefmtr)
library(data.table)
library(dplyr)
library(lubridate)
# load map function
source("Map.R")
# load plot function
source("Plot.R")
# load table function
source("Table.R")
# load dataset
bio_poland <- fread("poland.csv")
# filter dataset and select relevant columns
poland_bio <- bio_poland |>
filter(vernacularName != "") |>
select(
vernacularName,
longitudeDecimal,
latitudeDecimal,
individualCount,
eventDate,
locality
) |>
mutate(eventDate = as_date(eventDate))
# add blanks to vector of choices so that the widget loads blank
choices2 <- unique(poland_bio$vernacularName)
# create dashboard brand
dash_title <- dashboardBrand(
title = "Biodiversity in Poland",
color = "primary",
href = "https://www.gbif.org/occurrence/search?q=Poland&country=PL",
image = "bird_2.jpg"
)
# define UI
ui <- dashboardPage(
title = "Biodiversity",
scrollToTop = T,
help = NULL,
dark = NULL,
header = dashboardHeader(title = dash_title),
sidebar = dashboardSidebar(disable = T),
footer = dashboardFooter(left = "Source: Global Biodiversity Informational Facility"),
body = dashboardBody(
tags$style(HTML("
.box {
border: 2px solid #007bff !important;
box-shadow: none !important;
}
")),
fluidRow(
column(
12,
selectizeInput("vernacular",
label = strong("Vernacular Name"),
choices = choices2,
selected = "Mandarin Duck",
width = "100%"
)
)
),
fluidRow(
box(
class = "box",
title = "Map of Observations",
maximizable = TRUE,
width = 12,
status = "primary",
solidHeader = T,
leafletOutput("map_plot"), elevation = 4
)
),
fluidRow(
box(
class = "box",
title = "Plot of Observation Overtime",
maximizable = TRUE,
status = "primary",
solidHeader = T,
highchartOutput("chart"), elevation = 4
),
box(
class = "box",
title = "Observation Data",
maximizable = TRUE,
status = "primary",
solidHeader = T,
reactableOutput("table", height = 400),
elevation = 4
)
)
),
fullscreen = T
)
# Define server logic required to draw a histogram
server <- function(input, output, session) {
# make input values reactive and return the defaults if both input values are NULL
input_vernacular <- reactive({
input$vernacular %||% "Mandarin Duck"
})
# render map
output$map_plot <- renderLeaflet({
req(poland_bio)
tryCatch(
{
mapData(
df = poland_bio,
vernacular = input_vernacular()
)
},
error = function(e) {
leaflet() |>
addTiles() |>
addPopups(lng = 0, lat = 0, popup = "No data available for the selected filters")
}
)
})
# render chart
output$chart <- renderHighchart({
req(poland_bio)
tryCatch(
{
plotData(
df = poland_bio,
vernacular = input_vernacular()
)
},
error = function(e) {
highchart() |>
hc_title(text = "No data available for the selected filters")
}
)
})
# render table
output$table <- renderReactable({
req(poland_bio)
tryCatch(
{
tableFunction(
df = poland_bio,
vernacular = input_vernacular()
)
},
error = function(e) {
reactable(data.frame(
Message = "No data available for the selected filters"
))
}
)
})
}
# Run the application
shinyApp(ui = ui, server = server)
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