server.R

# This is the server logic of a Shiny web application. You can run the
# application by clicking 'Run App' above.

library(shiny)
library(tidyverse)
library(lubridate)
library(leaflet)
library(EDIutils)
library(shinycssloaders)

loadLTERnutrients <- function() {
  # Package ID: knb-lter-ntl.1.60 Cataloging System:https://pasta.edirepository.org.
  # Data set title: North Temperate Lakes LTER:
  # Chemical Limnology of Primary Study Lakes: Nutrients, pH and Carbon 1981 - current
  
  # inUrl1  <- "https://pasta.lternet.edu/package/data/eml/knb-lter-ntl/1/60/0ff1fd13116d6097376e3745194cdc5f"  
  # LTERnutrients = read_csv(inUrl1)
  
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "1", filter = "newest")
  packageid = paste0('knb-lter-ntl.1.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERnutrients = read_csv(file = raw)
}

loadLTERions <- function() {
  # Package ID: knb-lter-ntl.2.38 Cataloging System:https://pasta.edirepository.org.
  # Data set title: North Temperate Lakes LTER:
  # Chemical Limnology of Primary Study Lakes: Major Ions 1981 - current
  
  # inUrl2  <- "https://pasta.lternet.edu/package/data/eml/knb-lter-ntl/2/38/0701a84081989bb1ff37d621a6c4560a"  
  # LTERions = read_csv(inUrl2)
  
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "2", filter = "newest")
  packageid = paste0('knb-lter-ntl.2.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERions = read_csv(file = raw)
  
}

loadLTERtemp <- function() {
  # Package ID: knb-lter-ntl.29.35 Cataloging System:https://pasta.edirepository.org.
  # Data set title: North Temperate Lakes LTER:
  # Physical Limnology of Primary Study Lakes 1981 - current
  
  # inUrl3  <- "https://pasta.lternet.edu/package/data/eml/knb-lter-ntl/29/35/03e232a1b362900e0f059859abe8eb97"
  # LTERtemp = read_csv(inUrl3)
  
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "29", filter = "newest")
  packageid = paste0('knb-lter-ntl.29.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERtemp = read_csv(file = raw)
}

loadLTERsecchi <- function() {
  # Package ID: knb-lter-ntl.31.32 Cataloging System:https://pasta.edirepository.org.
  # Data set title: North Temperate Lakes LTER: Secchi Disk Depth; Other Auxiliary Base Crew Sample Data 1981 - current.
  
  # inUrl4  <- "https://pasta.lternet.edu/package/data/eml/knb-lter-ntl/31/32/d01c782e0601d2217b94dd614444bd33"
  # LTERsecchi = read_csv(inUrl4)
  
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "31", filter = "newest")
  packageid = paste0('knb-lter-ntl.31.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERsecchi = read_csv(file = raw)
}

loadLTERice <- function() {
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "32", filter = "newest")
  packageid = paste0('knb-lter-ntl.32.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  
  # Load northern data
  LTERiceN = read_csv(file = raw) |> 
    select(lakeid, year, duration)
  
  # Load southern data
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "33", filter = "newest")
  packageid = paste0('knb-lter-ntl.33.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERiceS = read_csv(file = raw) |> 
    select(lakeid, year, duration)
  
  # Join N and S datasets
  LTERiceN |> bind_rows(LTERiceS)
}

loadLTERzoop <- function() {
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "37", filter = "newest")
  packageid = paste0('knb-lter-ntl.37.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  
  # Load northern data
  LTERzoopN = read_csv(file = raw)
  
  # Load southern data
  revision = list_data_package_revisions(scope = 'knb-lter-ntl', identifier = "90", filter = "newest")
  packageid = paste0('knb-lter-ntl.90.', revision)
  res = read_data_entity_names(packageid)
  raw = read_data_entity(packageId = packageid, entityId = res$entityId[1])
  LTERzoopS = read_csv(file = raw)
  
  # Join N and S datasets
  LTERzoopN |> bind_rows(LTERzoopS) |> 
    mutate(code = floor(species_code/10000)) |>
    mutate(zoopGroup = case_when(code == 1 ~ 'copepod nauplii',
                                 code == 2 ~ 'cyclopoid',
                                 code == 3 ~ 'calanoid',
                                 code == 4 ~ 'harpacticoid',
                                 code == 5 ~ 'cladocera',
                                 code == 6 ~ 'rotifer',
                                 code == 7 ~ 'unknown',
                                 code == 8 ~ 'unknown',
                                 code == 9 ~ 'unknown')) |> 
    filter(code %in% c(2,3,5,6)) |> # cladocera and copepods
    group_by(lakeid, year4, sample_date, zoopGroup) |> 
    summarise(value = sum(density)) |> 
    rename(item = zoopGroup, sampledate = sample_date)
}

LTERtemp = 
  loadLTERtemp() %>%
  dplyr::select(-flagdepth) %>% 
  mutate(across(everything(), ~replace(., .<0 , NA))) %>%
  rename_at(vars(wtemp:frlight), ~ str_c("value_",.)) %>%
  rename_at(vars(flagwtemp:flagfrlight), ~ str_c("error_",.)) %>%
  rename_all(~str_replace_all(.,"flag","")) %>%
  pivot_longer(-(lakeid:event), names_to = c('.value','item'), names_sep = '_') %>%
  filter(!is.na(value) & value>= 0) %>%
  filter(!str_detect(error,'A|K|L|H') | is.na(error)) %>%
  dplyr::select(-error) 

LTERsecchi = 
  loadLTERsecchi() %>%
  mutate(across(everything(), ~replace(., .<0 , NA))) %>%
  select(lakeid:secnview) |> 
  pivot_longer(-(lakeid:sta), names_to = c('item')) %>%
  filter(!is.na(value) & value>= 0) |> 
  mutate(depth = 0, .after = sampledate) |> 
  mutate(rep = 1, .after = depth)
  
# LTERnutrients = loadLTERnutrients() %>%
#   mutate(across(everything(), ~replace(., .<0 , NA))) %>%
#   # rename_all( ~ str_replace(., "_sloh", '.sloh')) %>%
#   # rename_all( ~ str_replace(., "_n", '.n')) %>%
#   rename_at(vars(ph:drsif_WSLH), ~ str_c("value_",.)) %>%
#   rename_at(vars(flagdepth:flagdrsif_WSLH), ~ str_c("error_",.)) %>%
#   rename_all(~str_replace_all(.,"flag","")) %>%
#   pivot_longer(-(lakeid:event), names_to = c('.value','item'), names_sep = '_') %>%
#   filter(!is.na(value) & value>= 0) %>%
#   filter(!str_detect(error,'A|K|L|H|U') | is.na(error)) %>%
#   dplyr::select(-error) %>% 
#   mutate(value = case_when(str_detect(item, "_WSLH") ~ value*1000, #change sloh from mg to µg
#                            TRUE ~ value)) %>% 
#   mutate(item = case_when(str_detect(item, "_WSLH") ~  str_remove(item, "_WSLH"),
#                           TRUE ~ item))

LTERnutrients = loadLTERnutrients() %>%
  mutate(across(everything(), ~replace(., .<0 , NA))) %>%
  rename_all( ~ str_replace(., "_WSLH", '.WSLH')) %>%
  #rename_all( ~ str_replace(., "_n", '.n')) %>%
  rename_at(vars(ph:drsif.WSLH), ~ str_c("value_",.)) %>%
  rename_at(vars(flagdepth:flagdrsif.WSLH), ~ str_c("error_",.)) %>%
  rename_all(~str_replace_all(.,"flag","")) %>%
  pivot_longer(-(lakeid:event), names_to = c('.value','item'), names_sep = '_') %>%
  filter(!is.na(value) & value>= 0) %>%
  filter(!str_detect(error,'A|K|L|H|U') | is.na(error)) %>%
  dplyr::select(-error) %>% 
  mutate(value = case_when(str_detect(item, ".WSLH") ~ value*1000, #change sloh from mg to µg
                           TRUE ~ value)) %>% 
  mutate(item = case_when(str_detect(item, ".WSLH") ~  str_remove(item, ".WSLH"),
                          TRUE ~ item))

LTERions = loadLTERions() %>%
  mutate(across(everything(), ~replace(., .<0 , NA))) %>%
  rename_all( ~ str_replace(., "_sloh", '.sloh')) %>%
  rename_all( ~ str_replace(., "_n", '.n')) %>%
  rename_at(vars(cl:cond), ~ str_c("value_",.)) %>%
  rename_at(vars(flagcl:flagcond), ~ str_c("error_",.)) %>%
  rename_all(~str_replace_all(.,"flag","")) %>%
  pivot_longer(-(lakeid:event), names_to = c('.value','item'), names_sep = '_') %>%
  filter(!is.na(value) & value>= 0) %>%
  filter(!str_detect(error,'A|K|L|H|U') | is.na(error)) %>%
  dplyr::select(-error)

LTERice = loadLTERice() |> 
  rename(year4 = year, value = duration) |> 
  mutate(item = 'iceduration') |> 
  mutate(sampledate = as.Date(paste0(year4,'-01-01'))) |> 
  mutate(daynum = yday(sampledate)) |> 
  mutate(depth = 0, rep = 1, sta = 1) |> 
  select(lakeid, year4, daynum, sampledate, depth, rep, sta, item, value)

LTERzoops = loadLTERzoop() |> 
  mutate(daynum = yday(sampledate)) |> 
  mutate(depth = 0, rep = 1, sta = 1) |> 
  select(lakeid, year4, daynum, sampledate, depth, rep, sta, item, value)

matchtable = data.frame(vars =  c('wtemp','o2','o2sat','doc','dic','toc','tic','no3no2','nh4',
                                  'totnuf','totnf','drp','totpuf','totpf', 'drsif',
                                  'ph','alk',
                                  'ca','mg','na','k','so4','cl','cond',
                                  'secview','secnview','iceduration',
                                  'cladocera','calanoid','cyclopoid','rotifer'),
                        names = c('Water Temperature (°C)',
                                  'Dissolved Oxygen (mg/L)',
                                  'Dissolved Oxygen (% sat)',
                                  'Dissolved Organic Carbon (mg/L)',
                                  'Dissolved Inorganic Carbon (mg/L)',
                                  'Total Organic Carbon (mg/L)',
                                  'Total Inorganic Carbon (mg/L)',
                                  'Nitrate + Nitrite as N (µg/L)',
                                  'Ammonium as N (µg/L)',
                                  'Total Nitrogen unfiltered (µg/L)',
                                  'Total Nitrogen filtered (µg/L)',
                                  'Dissolved Reactive Phosphorus (µg/L)',
                                  'Total Phosphorus unfiltered (µg/L)',
                                  'Total Phosphorus filtered (µg/L)',
                                  'Dissolved Reactive Silica (µg/L)',
                                  'pH',
                                  'Alkalinity (ueq/L)',
                                  'Calcium (mg/L)',
                                  'Magnesium (mg/L)',
                                  'Sodium (mg/L)',
                                  'Potassium (mg/L)',
                                  'Sulfate (mg/L)',
                                  'Chloride (mg/L)',
                                  'Specific Conductance (µS/cm)',
                                  'Secchi with viewer',
                                  'Secchi without viewer',
                                  'Lake ice duration (days)',
                                  'Cladocera (#/L)',
                                  'Calanoid copepod (#/L)',
                                  'Cyclopoid copepod (#/L)',
                                  'Rotifer (#/L)'),
                        url = c(rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=29',3),
                          rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=1',14),
                          rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=2',7),
                          rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=31',2),
                          rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=32',1),
                          rep('https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=37',4)))

lakelocations = data.frame(Lake = c("Allequash Lake", "Big Muskellunge Lake", 
                                    "Crystal Bog", "Crystal Lake", "Sparkling Lake", "Trout Bog", 
                                    "Trout Lake", "Lake Mendota", "Lake Monona", "Lake Wingra", "Fish Lake"),
                           Lat = c(46.038317, 46.021067, 46.007583, 46.00275, 46.007733, 
                                   46.04125, 46.029267, 43.09885, 43.06337, 43.05258, 43.28733), 
                           Long = c(89.620617, -89.611783, -89.606183, -89.612233, -89.701183, 
                                    -89.686283, -89.665017, -89.40545, -89.36086, -89.42499, 
                                    -89.65173))

allLTER = LTERnutrients %>% bind_rows(LTERtemp) %>% bind_rows(LTERions) %>% bind_rows(LTERsecchi) |> 
  bind_rows(LTERice, LTERzoops) |> 
  mutate(lakename = case_when(lakeid == 'AL' ~ 'Allequash',
                              lakeid == 'BM' ~ 'Big Musky',
                              lakeid == 'CR' ~ 'Crystal',
                              lakeid == 'CB' ~ 'Crystal Bog',
                              lakeid == 'SP' ~ 'Sparkling',
                              lakeid == 'TR' ~ 'Trout',
                              lakeid == 'TB' ~ 'Trout Bog',
                              lakeid == 'ME' ~ 'Mendota',
                              lakeid == 'MO' ~ 'Monona',
                              lakeid == 'FI' ~ 'Fish',
                              lakeid == 'WI' ~ 'Wingra'))

# Define server logic required to draw a histogram
shinyServer(function(input, output) {
  
  # Get full variable name from matchtable
  varname <- reactive({
    a <- matchtable %>% dplyr::filter(names == input$input.vars) %>% dplyr::pull(vars)
    return(a)
  })
  
  # Get url of dataset name from matchtable
  # output$urlname <- renderText({ 
  #   a <- matchtable %>% dplyr::filter(names == input$input.vars) %>% dplyr::pull(url)
  #   return(a)
  # })
  # Get url of dataset name from matchtable
  output$urlname <- renderUI({
    a <- matchtable %>% dplyr::filter(names == input$input.vars) %>% dplyr::pull(url)
    url <- a("EDI Dataset Page", href = a, target="_blank")
    tagList("A friendly reminder to please cite data! Data citation for this dataset can be found here: ", url)
  })
  
  renderUI({
    paste("URL link:", url)
  })
  
  # Get depths
  getdepths = reactive({
    if (input$input.lake == 'All northern lakes') {
      lakes = c('Allequash','Big Musky','Crystal','Crystal Bog','Sparkling','Trout','Trout Bog')
    } else if (input$input.lake == 'All southern lakes') {
      lakes = c('Mendota','Monona','Fish','Wingra')
    } else {
      lakes = input$input.lake
    }
    
    if (varname() == 'iceduration') {
      b = 0
    } else {
      b = allLTER %>% 
        filter(lakename %in% lakes) %>% 
        filter(item == varname()) %>% 
        group_by(depth) %>% tally() %>% filter(n > 50) %>% pull(depth)
    }
    return(b)
  })
  
  
  ## used to find depths dependent on data
  output$datadepths <- renderUI({
    selectInput("depths", "select depth (m)", choices = getdepths(), selected = 0)
  })
  
  allLTER_filtered <- reactive({ 
    d = allLTER %>% 
      filter(item == varname()) %>% 
      filter(depth == input$depths)
    
    if (input$plottype == 'plot.am') {
      d = d %>% group_by(lakeid, lakename, item, year4) %>% 
        filter(rep == 1) %>% 
        filter(year4 != 1981) %>% 
        summarise_if(is.numeric, mean, na.rm = TRUE) %>% 
        mutate(sampledate = as.Date(paste0(year4,'-07-01')))
    }
    return(d)
  })
  
  # OUTPUT TESTING
  # output$testvar = renderText(print(varname()))
  # output$testvar2 = renderText(print(names(allLTER_filtered())))
  
  # Plots 
  plotInput <- reactive({ 
    
    p = if(input$input.lake == 'All northern lakes') {
      ggplot(allLTER_filtered() %>% filter(lakename %in% c('Allequash','Big Musky','Crystal','Crystal Bog','Sparkling','Trout','Trout Bog'))) +
        if('Free y-axis' %in% input$scales) {
          facet_wrap(~lakename, scales = "free_y") 
        } else {
          facet_wrap(~lakename)
        }
    } else if (input$input.lake == 'All southern lakes') {
      ggplot(allLTER_filtered() %>% filter(lakename %in% c('Mendota','Monona','Fish','Wingra'))) +
        if('Free y-axis' %in% input$scales) {
          facet_wrap(~lakename, scales = "free_y") 
        } else {
          facet_wrap(~lakename)
        }
    } else {
      ggplot(allLTER_filtered() %>% filter(lakename == input$input.lake))
    }
    
    if (input$plottype == 'plot.mb') {
      p = p +
        geom_boxplot(aes(x = month(sampledate), y = value, group = month(sampledate)), fill = '#c2d6f0') +
        scale_x_discrete(limits = month.abb) 
    } else {
      p = p +
        geom_line(aes(x = sampledate, y = value)) +
        geom_point(aes(x = sampledate, y = value), size = 0.4)
    }
    if ('Log y-axis' %in% input$scales) {
      p = p + scale_y_log10()
    }
    p = p +
      ylab(input$input.vars) +
      theme_minimal(base_size = 14, base_family = 'Helvetica') +
      theme(axis.title.x = element_blank(),
            panel.grid = element_line(colour = "grey80"))
  })
  
  # Dislay plot
  output$distPlot <- renderPlot({
    print(plotInput())
  })
  
  # Download plot
  output$downloadImage = downloadHandler(
    filename = function() {paste0(input$input.lake,'_',varname(),'_',input$input.depth,'m.png')},
    content = function(file) {
      ggsave(file, plot = plotInput() + theme_bw(base_size = 8), width = 6, height = 4, units = 'in', dpi = 500,
             device = "png")
    })
  
  # # Make map 
  map = leaflet(data = lakelocations) %>%
    addTiles() %>%
    addMarkers(~Long, ~Lat, popup = ~as.character(Lake), label = ~as.character(Lake)) %>%
    setView(-89.6, 44.5, zoom = 6)
  output$myMap = renderLeaflet(map)
  
  
})