GeoGHM/app.R

library(tidyverse)
library(shiny)
library(leaflet)
library(RColorBrewer)
library(sp)
library(rgdal)
library(plotly)
library(stringr)
library(lubridate)

# Lecture fichier de GHM ----
read_csv("ghm.csv", col_types = cols(IPP = col_character())) %>%
  `names<-`(c("IPP", "IEP", "Age", "Sexe", "Codepos", "GHM", "date_entree", "date_sortie")) %>%
  mutate(date_entree = date_entree %>% as.Date(format = "%Y/%m/%d"),
         date_sortie = date_sortie %>% as.Date(format = "%Y/%m/%d"),
         DS = as.numeric(date_sortie - date_entree),
         Sexe = Sexe %>% factor(labels = c("Homme", "Femme"))) -> GHM

# Lecture labels racines de GHM et garder celles existantes ----
read_csv("racinesGHM.csv") %>%
  mutate(codlib = str_c(racine, " - ", libelle)) -> racines
racine <- racines$racine
names(racine) <- racines$codlib

racine <- racine[racine %in% GHM$GHM]
rm(racines)

# # Lecture codes postaux <-> codes insee et sauvegarde carte pour simplification avec mapshaper
# read_csv2("insee.csv", col_types = cols(INSEE = col_character())) %>%
#   select(Codepos, insee = INSEE) %>%
#   mutate(insee = insee %>% str_pad(5, "left", "0")) -> insee
# # Lecture carte et join avec codes postaux ----
# readOGR("communes", "communes-20150101-100m") -> communes
# communes@data %>%
#   left_join(insee) -> communes@data
# rm(insee)
# communes <- communes[!is.na(communes$Codepos),]
# writeOGR(communes, "communes_byCP", "communes_byCP", driver = "ESRI Shapefile")

# Lecture carte ----
readOGR("communes_byCP", "communes_byCP") -> communes

# Filtre Codes existants dans la base
communes <- communes[communes$Codepos %in% GHM$Codepos,]
communes@data$Codepos <- communes@data$Codepos %>% as.character


# long/lat de chaque commune ----

lngs <- communes@polygons %>% map(~slot(.x, "labpt")) %>% map_dbl(1)
lats <- communes@polygons %>% map(~slot(.x, "labpt")) %>% map_dbl(2)
min_age <- GHM$Age %>% min(na.rm = T)
max_age <- GHM$Age %>% max(na.rm = T)
min_date <- GHM$date_entree %>% min(na.rm =T)
max_date <- GHM$date_sortie %>% max(na.rm =T)

# UI ----
ui <- bootstrapPage(
                    tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
                    leafletOutput("map", width = "100%", height = "100%"),
                    absolutePanel(top = 10, right = 10, width = "20%",
                                  # GHM
                                  plotOutput("plot_ghm", height = 200),
                                  selectizeInput("choice_ghm", "GHM", racine, multiple = T),
                                  # Age
                                  plotOutput("plot_age", height = 200),
                                  sliderInput("slider_age", "Age", min_age, max_age, value = c(min_age, max_age)),
                                  # Sexe
                                  plotOutput("plot_sexe", height = 200),
                                  checkboxGroupInput("check_sexe", "Sexe", c("Homme", "Femme"), c("Homme", "Femme"))
                                  ),
                    absolutePanel(bottom = 10, left = "2.5%", width = "75%",
                                  sliderInput("slider_date", "Dates", width = "100%", min = min_date, max = max_date, value = c(max_date - years(1), max_date))
                                  )
                    )

# Server ----
server <- function(input, output, session)
{
  # Create map
  output$map <- renderLeaflet({
    leaflet(options = leafletOptions(minZoom = 6, maxZoom = 14)) %>%
      addProviderTiles(providers$CartoDB.Positron) %>%
      setView(lat = 48.35, lng = 6, zoom = 8)
  })

  # in GHM
  in_ghm <- reactive({
    if (is.null(input$choice_ghm))
      GHM
    else
      GHM %>% filter(GHM %in% input$choice_ghm)
  })

  # in time
  in_time <- reactive({
    req(input$slider_date, in_ghm())

    filter(in_ghm(), date_entree <= input$slider_date[2] & date_sortie >= input$slider_date[1])
  })

  # in bounds
  in_bounds <- reactive({
    req(input$map_bounds, in_time())

    bounds <- input$map_bounds
    latrng <- range(bounds$north, bounds$south)
    lngrng <- range(bounds$east, bounds$west)

    codes_pos <- communes[lats >= latrng[1] & lats <= latrng[2] & lngs >= lngrng[1] & lngs <= lngrng[2],]$Codepos

    filter(in_time(), Codepos %in% codes_pos)
  })

  # GHM
  data_ghm <- reactive({
    req(input$slider_age, input$check_sexe, input$slider_date, in_time())

    in_bounds() %>%
      filter(Age <= input$slider_age[2] & Age >= input$slider_age[1], 
             Sexe %in% input$check_sexe)
  })

  output$plot_ghm <- renderPlot({
    data_ghm() %>%
      count(GHM, Sexe) %>%
      arrange(desc(n)) %>%
      .[1:20,] %>%
      ungroup() %>%
      mutate(GHM = GHM %>% factor(levels = GHM %>% unique %>% rev)) %>%
      ggplot() +
      aes(x = GHM, y = n, fill = Sexe) +
      geom_bar(stat = "identity") +
      scale_fill_manual(values = c("Homme" = "lightblue", "Femme" = "pink")) +
      coord_flip() +
      theme(axis.title = element_blank(),
            legend.position = "none")
  })

  # Sexe
  data_sexe <- reactive({
    req(input$slider_age, input$slider_date, in_time())

    in_bounds() %>%
      filter(Age <= input$slider_age[2] & Age >= input$slider_age[1])
  })

  output$plot_sexe <- renderPlot({
    data_sexe() %>%
      ggplot() +
      aes(x = 1, fill = Sexe) +
      geom_bar() +
      coord_flip() +
      scale_fill_manual(values = c("Homme" = "lightblue", "Femme" = "pink")) +
      theme(axis.title = element_blank(),
            legend.position = "none",
            axis.text.y = element_blank(),
            axis.ticks.y = element_blank())
  })

  # Age
  data_age <- reactive({
    req(input$slider_date, input$check_sexe, in_time())

    in_bounds() %>%
      filter(Sexe %in% input$check_sexe)
  })

  output$plot_age <- renderPlot({ 
    data_age() %>%
      ggplot() +
      aes(x = Age, fill = Sexe) +
      geom_histogram(binwidth = 5) +
      scale_fill_manual(values = c("Homme" = "lightblue", "Femme" = "pink")) +
      scale_x_continuous(limits = c(min_age, max_age)) +
      theme(axis.title = element_blank(),
            legend.position = "none")
  })

  # filtered GHM
  filteredData <- reactive({
    req(input$check_sexe, input$slider_age, input$slider_date, in_time())

    in_time() %>%
      filter(Sexe %in% input$check_sexe,
             Age <= input$slider_age[2] & Age >= input$slider_age[1]) %>%
    count(Codepos)
  })

  # Map
  observe({
    req(filteredData())

    comm <- communes
    comm@data %>%
      left_join(filteredData()) -> comm@data

    comm <- comm[!is.na(comm$n),]

    pal <- colorNumeric(palette = topo.colors(100), domain = comm$n, na.color = NA, reverse = T)

    leafletProxy("map") %>%
      clearShapes() %>%
      clearControls()

    leafletProxy("map", data = comm) %>%
      addPolygons(weight = 1, color = "#222222", opacity = .1, fillOpacity = .3, fillColor = ~pal(n), label = ~as.character(n), highlightOptions = highlightOptions(color = "black", opacity = 1)) %>%
      addLegend(position = "topleft", pal = pal, values = ~n)
  })
}

# App ----
shinyApp(ui = ui, server = server)