app.R

library(shiny)
library(dplyr)
library(ggplot2)
library(utils)
library(ggiraph)
library(htmlwidgets)

data1 <- read.csv("data1.csv", header = TRUE, check.names = FALSE, fileEncoding = "UTF-8")
data1 <- data1[,2:54]

# Sample pitch type lookup - modify if needed
pitch_type_lookup <- data.frame(
  pitch_name = c("Changeup", "Curveball", "Cutter", "Eephus", "Forkball", 
                 "Four-Seam Fastball", "Knuckle Ball", "Knuckle Curve", 
                 "Screwball", "Sinker", "Slider", "Slurve", "Splitter", "Sweeper"),
  pitch_abbr = c("CH", "CU", "FC", "EP", "FO", "FF", "KN", "KC", 
                 "SC", "SI", "SL", "SV", "FS", "ST"),
  stringsAsFactors = FALSE
)

# Define pitch colors
pitch_colors <- c(
  "FF" = "#FF4136", 
  "SI" = "#FF851B", 
  "FC" = "#FFDC00",
  "CH" = "#2ECC40", 
  "SL" = "#0074D9", 
  "ST" = "#ED68ED",
  "CU" = "#B10DC9", 
  "FS" = "#01FF70", 
  "KC" = "#85144b",
  "SV" = "#3D9970", 
  "KN" = "#39CCCC", 
  "FO" = "#F012BE",
  "EP" = "#AAAAAA", 
  "FA" = "#7FDBFF", 
  "SC" = "#FF69B4"
)

break_plot_Szn <- function(game, data1, sdate, edate) {
  game <- game %>% filter(between(as.Date(date), sdate, edate))
  total_pitches <- nrow(game)
  usage_stats <- game %>%
    group_by(pitch_name) %>%
    summarise(
      count = n(),
      usage = sprintf("%.1f%%", (count/total_pitches) * 100)
    )
  
  game <- game %>% 
    left_join(pitch_type_lookup, by = c("pitch_name")) %>%
    left_join(usage_stats, by = "pitch_name")
  
  game <- game %>% filter(!is.na(pitch_abbr))
  title <- paste0(unique(game$`Pitcher Name`)," ",sdate," to ",edate)
  pitcher_hand <- unique(game$phand)
  
  angle_degrees <- round(mean(game$arm_angle,na.rm = TRUE),digits = 1)
  angle_radians <- angle_degrees * (pi / 180)
  
  if(pitcher_hand == "L") {
    leg <- c(0.08, .22)
    factor <- -1
  } else {
    leg <- c(0.92, .22)
    factor <- 1
  }
  
  x_end <- 50 * cos(angle_radians) * factor
  y_end <- 50 * sin(angle_radians)
  
  game_pitches <- unique(game$pitch_abbr)
  used_colors <- pitch_colors[game_pitches]
  
  avg_locations <- game %>%
    group_by(pitch_abbr) %>%
    summarize(
      avg_HB = mean(HB, na.rm = TRUE),
      avg_IVB = mean(IVB, na.rm = TRUE),
      avg_velo = mean(start_speed, na.rm = TRUE),
      usage = first(usage)
    )
  
  legend_labels <- paste0(names(used_colors), " (", 
                          avg_locations$usage[match(names(used_colors), avg_locations$pitch_abbr)], ")")
  
  fill_values <- used_colors
  names(fill_values) <- legend_labels
  
  arm_angle_data <- data1 %>%
    filter(!is.na(arm_angle), !is.na(phand), !is.na(pitch_name)) %>%
    filter(abs(round(arm_angle) - angle_degrees) <= 2, phand == pitcher_hand) %>%
    left_join(pitch_type_lookup, by = c("pitch_name")) %>%
    filter(!is.na(pitch_abbr)) %>%
    filter(pitch_abbr %in% game_pitches)
  
  p <- ggplot(game, aes(x = HB, y = IVB)) +
    geom_vline(xintercept = 0, color = "lightblue", linewidth = 1, linetype = 4) +
    geom_hline(yintercept = 0, color = "lightblue", linewidth = 1, linetype = 4) +
    stat_ellipse(
      data = arm_angle_data,
      aes(fill = paste0(pitch_abbr, " (", 
                        avg_locations$usage[match(pitch_abbr, avg_locations$pitch_abbr)], ")")),
      geom = "polygon",
      alpha = 0.2,
      level = 0.68,
      show.legend = FALSE
    ) +
    geom_point_interactive(
      data = avg_locations,
      aes(x = avg_HB, y = avg_IVB, 
          fill = paste0(pitch_abbr, " (", usage, ")"),
          tooltip = sprintf("Avg Velo: %.1f mph\nAvg IVB: %.1f in\nAvg HB: %.1f in",
                            avg_velo, avg_IVB, avg_HB)),
      color = "black", 
      size = 6, 
      stroke = .5, 
      shape = 21
    ) +
    geom_segment(x = 0, y = 0, xend = x_end, yend = y_end, 
                 color = "red", linewidth = 1, linetype = 5) +
    scale_fill_manual(values = fill_values) +
    labs(
      x = "Horizontal Break (in)",
      y = "Induced Vertical Break (in)", 
      title = title,
      subtitle = paste0("Arm Angle: ", angle_degrees, "\u00b0"),
      caption = "Data: MLB | Viz: @TimStats | tim-stats.com\nEllipses show average movement for same-handed pitchers at similar arm angles"
    ) +
    xlim(-25, 25) +
    ylim(-25, 25) +
    theme_minimal() +
    theme(
      legend.position = leg,
      plot.title = element_text(hjust = 0.5, face = "bold", color = "white"),
      plot.subtitle = element_text(hjust = 0.5, face = "italic", color = "white"),
      aspect.ratio = 1,
      plot.background = element_rect(fill = "#333333", color = NA),
      panel.background = element_rect(fill = "#333333", color = NA),
      axis.text = element_text(color = "white"),
      axis.title = element_text(color = "white"),
      legend.background = element_rect(fill = "#333333"),
      legend.text = element_text(color = "white"),
      legend.title = element_blank(),
      plot.margin = margin(10, 5, 10, 5),
      axis.line = element_blank(),
      axis.ticks = element_line(color = "white"),
      panel.grid = element_blank(),
      legend.key = element_blank(),
      plot.caption = element_text(color = "white", hjust = 0.5),
      panel.border = element_blank()
    )
  
  return(p)
}

break_plot_tot <- function(game, data1, sdate, edate) {
  game <- game %>% filter(between(as.Date(date), sdate, edate))
  total_pitches <- nrow(game)
  usage_stats <- game %>%
    group_by(pitch_name) %>%
    summarise(
      count = n(),
      usage = sprintf("%.1f%%", (count/total_pitches) * 100)
    )
  
  game <- game %>% 
    left_join(pitch_type_lookup, by = c("pitch_name")) %>%
    left_join(usage_stats, by = "pitch_name")
  
  game <- game %>% filter(!is.na(pitch_abbr))
  title <- paste0(unique(game$`Pitcher Name`)," ",sdate," to ",edate)
  pitcher_hand <- unique(game$phand)
  
  angle_degrees <- round(mean(game$arm_angle,na.rm = TRUE),digits = 1)
  angle_radians <- angle_degrees * (pi / 180)
  
  if(pitcher_hand == "L") {
    leg <- c(0.08, .22)
    factor <- -1
  } else {
    leg <- c(0.92, .22)
    factor <- 1
  }
  
  x_end <- 50 * cos(angle_radians) * factor
  y_end <- 50 * sin(angle_radians)
  
  game_pitches <- unique(game$pitch_abbr)
  used_colors <- pitch_colors[game_pitches]
  
  avg_locations <- game %>%
    group_by(pitch_abbr) %>%
    summarize(
      avg_HB = mean(HB, na.rm = TRUE),
      avg_IVB = mean(IVB, na.rm = TRUE),
      avg_velo = mean(start_speed, na.rm = TRUE),
      usage = first(usage)
    )
  
  legend_labels <- paste0(names(used_colors), " (", 
                          avg_locations$usage[match(names(used_colors), avg_locations$pitch_abbr)], ")")
  
  fill_values <- used_colors
  names(fill_values) <- legend_labels
  
  arm_angle_data <- data1 %>%
    filter(!is.na(arm_angle), !is.na(phand), !is.na(pitch_name)) %>%
    filter(abs(round(arm_angle) - angle_degrees) <= 2, phand == pitcher_hand) %>%
    left_join(pitch_type_lookup, by = c("pitch_name")) %>%
    filter(!is.na(pitch_abbr)) %>%
    filter(pitch_abbr %in% game_pitches)
  
  p <- ggplot(game, aes(x = HB, y = IVB)) +
    geom_vline(xintercept = 0, color = "lightblue", linewidth = 1, linetype = 4) +
    geom_hline(yintercept = 0, color = "lightblue", linewidth = 1, linetype = 4) +
    stat_ellipse(
      data = arm_angle_data,
      aes(fill = paste0(pitch_abbr, " (", 
                        avg_locations$usage[match(pitch_abbr, avg_locations$pitch_abbr)], ")")),
      geom = "polygon",
      alpha = 0.2,
      level = 0.68,
      show.legend = FALSE
    ) +
    geom_point_interactive(
      aes(fill = paste0(pitch_abbr, " (", usage, ")"),
          tooltip = sprintf("Velo: %.1f mph\nIVB: %.1f in\nHB: %.1f in", 
                            start_speed, IVB, HB)), 
      color = "#c6c6c6", 
      size = 3, 
      stroke = .5, 
      shape = 21
    ) +
    geom_point_interactive(
      data = avg_locations,
      aes(x = avg_HB, y = avg_IVB, 
          fill = paste0(pitch_abbr, " (", usage, ")"),
          tooltip = sprintf("Avg Velo: %.1f mph\nAvg IVB: %.1f in\nAvg HB: %.1f in",
                            avg_velo, avg_IVB, avg_HB)),
      color = "black", 
      size = 6, 
      stroke = .5, 
      shape = 21
    ) +
    geom_segment(x = 0, y = 0, xend = x_end, yend = y_end, 
                 color = "red", linewidth = 1, linetype = 5) +
    scale_fill_manual(values = fill_values) +
    labs(
      x = "Horizontal Break (in)",
      y = "Induced Vertical Break (in)", 
      title = title,
      subtitle = paste0("Arm Angle: ", angle_degrees, "\u00b0"),
      caption = "Data: MLB | Viz: @TimStats | tim-stats.com\nEllipses show average movement for same-handed pitchers at similar arm angles"
    ) +
    xlim(-25, 25) +
    ylim(-25, 25) +
    theme_minimal() +
    theme(
      legend.position = leg,
      plot.title = element_text(hjust = 0.5, face = "bold", color = "white"),
      plot.subtitle = element_text(hjust = 0.5, face = "italic", color = "white"),
      aspect.ratio = 1,
      plot.background = element_rect(fill = "#333333", color = NA),
      panel.background = element_rect(fill = "#333333", color = NA),
      axis.text = element_text(color = "white"),
      axis.title = element_text(color = "white"),
      legend.background = element_rect(fill = "#333333"),
      legend.text = element_text(color = "white"),
      legend.title = element_blank(),
      plot.margin = margin(10, 5, 10, 5),
      axis.line = element_blank(),
      axis.ticks = element_line(color = "white"),
      panel.grid = element_blank(),
      legend.key = element_blank(),
      plot.caption = element_text(color = "white", hjust = 0.5),
      panel.border = element_blank()
    )
  
  return(p)
}

ui <- fluidPage(
  # Remove useGirafe() line and just have girafeOutput in mainPanel
  
  titlePanel("2020-2024 MLB Pitch Plots"),
  
  sidebarLayout(
    sidebarPanel(
      width = 3,
      selectInput("player", "Select Player:", 
                  choices = unique(data1$`Pitcher Name`),
                  width = "100%"),
      dateRangeInput("date1", 
                     "Dates: (Be wary of multi year plots as arm angles may vary over years)", 
                     start = "2024-03-20", 
                     end = "2024-10-01",
                     width = "100%"),
      radioButtons("type", "Plot Type", 
                   choices = c("Season Average", "All Pitches")),
      actionButton("submit", "Update Plot", 
                   class = "btn btn-primary btn-block",
                   style = "margin-bottom: 10px"),
      downloadButton("download", "Download Plot",
                     class = "btn btn-success btn-block")
    ),
    
    mainPanel(
      width = 9,
      girafeOutput("Plot", width = "750px", height = "750px")
    )
  )
)
server <- function(input, output, session) {
  plotSettings <- reactiveVal(list(
    player = NULL,
    type = "Season Average",
    dates = c(as.Date("2024-03-20"), as.Date("2024-10-01"))
  ))
  
  observeEvent(input$submit, {
    plotSettings(list(
      player = input$player,
      type = input$type,
      dates = c(input$date1[1], input$date1[2])
    ))
  })
  
  output$Plot <- renderGirafe({
    settings <- plotSettings()
    req(settings$player)
    
    game <- data1 %>%
      filter(`Pitcher Name` == settings$player)
    
    if(nrow(game) == 0) {
      return(girafe(ggobj = ggplot() + 
                      annotate("text", x = 0.5, y = 0.5, 
                               label = "No data available for selected date range", 
                               color = "white") +
                      theme_void() +
                      theme(plot.background = element_rect(fill = "#333333", color = NA))))
    }
    
    plot <- if(settings$type == "Season Average") {
      break_plot_Szn(game, data1, settings$dates[1], settings$dates[2])
    } else {
      break_plot_tot(game, data1, settings$dates[1], settings$dates[2])
    }
    
    girafe(ggobj = plot,
           width_svg = 10,
           height_svg = 10,
           options = list(
             opts_tooltip(
               opacity = 0.8,
               css = "background-color: #333333; color: white; padding: 5px; border-radius: 3px;"
             ),
             opts_hover(
               css = "fill-opacity: 1; stroke: #FFF; stroke-width: 2;"
             ),
             opts_selection(
               type = "none"
             )
           ))
  })
  
  output$download <- downloadHandler(
    filename = function() {
      settings <- plotSettings()
      paste0(
        gsub(" ", "_", settings$player), "_",
        format(settings$dates[1], "%Y%m%d"), "_to_",
        format(settings$dates[2], "%Y%m%d"), ".png"
      )
    },
    content = function(file) {
      settings <- plotSettings()
      
      game <- data1 %>%
        filter(`Pitcher Name` == settings$player)
      
      plot <- if(settings$type == "Season Average") {
        break_plot_Szn(game, data1, settings$dates[1], settings$dates[2])
      } else {
        break_plot_tot(game, data1, settings$dates[1], settings$dates[2])
      }
      
      ggsave(file,
             plot = plot,
             width = 10,
             height = 10,
             dpi = 300,
             bg = "#333333")
    }
  )
}

# Run the application
shinyApp(ui = ui, server = server)