File size: 6,396 Bytes
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filepath = "/Users/alexandrudumitrescu/Documents/clima/2026/ssod/server.R"
with open(filepath, "r") as f:
lines = f.readlines()
start_idx = -1
end_idx = -1
for i, line in enumerate(lines):
if "# Stage 3: Init" in line:
start_idx = i
if "output$station_ready <- reactive({" in line:
end_idx = i
break
if start_idx != -1 and end_idx != -1:
new_fetch_logic = """ # --- Async Fetch Machine ---
# State variables for year-by-year fetching
years_to_fetch <- reactiveVal(numeric(0))
fetched_data <- reactiveVal(list())
current_year_idx <- reactiveVal(1)
# Stage 3: Init Fetching
observe({
req(fetch_stage() == 3)
station_id <- current_station_id()
if (is.null(station_id)) {
reset_fetch()
return()
}
current_start <- isolate(input$date_range[1])
current_end <- isolate(input$date_range[2])
if (is.null(current_start) || is.null(current_end)) {
reset_fetch("Invalid date range.")
return()
}
start_yr <- as.integer(format(as.Date(current_start), "%Y"))
end_yr <- as.integer(format(as.Date(current_end), "%Y"))
years <- seq(start_yr, end_yr)
years_to_fetch(years)
fetched_data(list())
current_year_idx(1)
fetch_retry_count(0)
fetch_message(paste("Checking availability for", length(years), "years..."))
this_token <- current_fetch_token()
later::later(
function() {
if (identical(isolate(current_fetch_token()), this_token)) {
fetch_stage(4)
}
},
0.1
)
fetch_stage(-1)
})
# Stage 4: Fetch Loop
observe({
req(fetch_stage() == 4)
station_id <- current_station_id()
if (is.null(station_id)) {
reset_fetch()
return()
}
idx <- current_year_idx()
years <- years_to_fetch()
if (idx > length(years)) {
# Transition to finalize stage
fetch_stage(6)
return()
}
year <- years[idx]
fetch_message(paste0("Fetching data for ", year, " (", idx, "/", length(years), ")..."))
session$sendCustomMessage("freezeUI", list(text = paste0("Fetching data for ", year, " (", idx, "/", length(years), ")..."), station = current_station_label()))
res <- fetch_ssod_year_mem(station_id, year)
if (!is.null(res$error)) {
if (res$error == "transient") {
if (fetch_retry_count() < 3) {
fetch_retry_count(fetch_retry_count() + 1)
fetch_message(paste("Network drop. Retrying year", year, "- Attempt", fetch_retry_count()))
this_token <- current_fetch_token()
later::later(function() {
if (identical(isolate(current_fetch_token()), this_token)) {
fetch_stage(4)
}
}, 1.0)
fetch_stage(-1)
return()
} else {
reset_fetch(paste("Connection failed after retries for year", year))
return()
}
} else {
reset_fetch(paste("Fatal error fetching year", year, ":", res$message))
return()
}
}
if (res$status == 200) {
# Parse data
tmp <- tempfile(fileext=".csv")
writeBin(res$content, tmp)
tryCatch({
df <- parse_ssod_data(tmp)
if (!is.null(df) && nrow(df) > 0) {
cur_data <- fetched_data()
cur_data[[as.character(year)]] <- df
fetched_data(cur_data)
}
}, error = function(e) {
# Ignore parse errors for a single year and continue
})
unlink(tmp)
}
# Success or 404, move to next year
fetch_retry_count(0)
current_year_idx(idx + 1)
this_token <- current_fetch_token()
later::later(function() {
if (identical(isolate(current_fetch_token()), this_token)) {
fetch_stage(4)
}
}, 0.1)
fetch_stage(-1)
})
# Stage 6: Combine & Finalize
observe({
req(fetch_stage() == 6)
dfs <- fetched_data()
if (length(dfs) > 0) {
df_combined <- bind_rows(dfs) %>% arrange(datetime)
full_station_data(df_combined)
# Auto-adjust date range if current range has no data
current_start <- isolate(input$date_range[1])
current_end <- isolate(input$date_range[2])
if (!is.null(current_start) && !is.null(current_end)) {
actual_max_date <- as.Date(max(df_combined$datetime, na.rm = TRUE))
actual_min_date <- as.Date(min(df_combined$datetime, na.rm = TRUE))
if (as.Date(current_start) > actual_max_date || as.Date(current_end) < actual_min_date) {
new_end <- actual_max_date
new_start <- max(actual_min_date, new_end - 731)
updateDateRangeInput(session, "date_range", start = new_start, end = new_end)
prev_start_date(new_start)
prev_end_date(new_end)
}
}
mem_size <- format(object.size(df_combined), units = "Mb")
final_msg <- paste0("Processing Complete!<br><span style='font-size: 0.9em; color: #555;'>In-Memory Data: <b>", mem_size, "</b></span>")
fetch_message(final_msg)
loading_station(FALSE)
fetch_stage(0)
this_token <- current_fetch_token()
session$sendCustomMessage("freezeUI", list(text = "Rendering plots...", station = current_station_label()))
updateNavbarPage(session, "main_nav", selected = "Dashboard")
session$sendCustomMessage("freezeUI", list(text = "Rendering plots...", allowCancel = TRUE))
session$onFlushed(function() {
if (identical(isolate(current_fetch_token()), this_token)) {
session$sendCustomMessage("waitForPlots", list())
}
}, once = TRUE)
} else {
reset_fetch("No valid records found in the selected date range.")
}
fetch_stage(-1)
})
"""
new_lines = lines[:start_idx] + [new_fetch_logic] + lines[end_idx:]
with open(filepath, "w") as f:
f.writelines(new_lines)
print("Successfully replaced fetch logic!")
else:
print(f"Could not find start/end indices. Start: {start_idx}, End: {end_idx}")
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