Add active listings tab from RentCast API

- update_listings.R: pulls 1-mile radius, clips to plat boundary
- Listings tab: table with listed date, address, sqft, price, $/sqft
- Weekly cron: Sunday 11:30pm (30 min after owners refresh)
- httr2 added to renv.lock

.Renviron

@@ -0,0 +1 @@
+RENTCAST_API_KEY=489cba549ec548e2a11516e7bd4f3b5b

app.R

@@ -9,6 +9,7 @@ library(DT)
 
 # load data ----
 owners   <- readRDS("./data/owners.rds")
+listings <- readRDS("./data/listings.rds")
 last_sale_date <- format(attr(owners, "last_sale_date"), "%Y-%m-%d")
 sbdvn <- sf::st_read("./data/plats/plats.shp")
 venice_bndry <- readRDS("./data/venice.rds")
@@ -87,6 +88,11 @@ ui <- f7Page(
             title = "Owners",
             icon = f7Icon("person_2_fill")
           ),
+          f7PanelItem(
+            tabName = "Listings",
+            title = "Listings",
+            icon = f7Icon("tag_fill")
+          ),
           f7PanelItem(
             tabName = "Resources",
             title = "Resources",
@@ -244,6 +250,17 @@ ui <- f7Page(
           )
         )
       ),
+      #### listings ----
+      f7Tab(
+        title = "Listings",
+        tabName = "Listings",
+        icon = f7Icon("tag_fill"),
+        f7Card(
+          title = "Active Listings:",
+          divider = TRUE,
+          DTOutput("listings_table")
+        )
+      ),
       #### services ----
       f7Tab(
         title = "Resources",
@@ -456,6 +473,25 @@ server <- function(input, output) {
     }
   )
 
+# listings table ----
+  output$listings_table <- renderDT({
+    datatable(
+      listings |>
+        select(listed_date, address, sqft, price, price_per_sqft) |>
+        mutate(
+          price         = scales::dollar(price),
+          price_per_sqft = scales::dollar(price_per_sqft)
+        ),
+      colnames  = c("Listed", "Address", "Sq Ft", "Price", "$/Sq Ft"),
+      rownames  = FALSE,
+      options   = list(
+        pageLength = 25,
+        searching  = FALSE,
+        dom        = 't'
+      )
+    )
+  })
+
 # venice map ----
   output$venice_map <- renderLeaflet({
     leaflet() %>% 

data-raw/update_listings.R

@@ -0,0 +1,68 @@
+# update_listings.R
+# Weekly update: pull active listings from RentCast within 1 mile of
+# St. Andrews center, clip to plat boundary, save data/listings.rds.
+# Input:  .Renviron (RENTCAST_API_KEY)
+#         data/plats/plats.shp
+# Output: data/listings.rds
+
+library(httr2)
+library(jsonlite)
+library(sf)
+library(dplyr)
+
+# ── API key ───────────────────────────────────────────────────────────────────
+api_key <- Sys.getenv("RENTCAST_API_KEY")
+if (identical(api_key, "")) stop("Missing RENTCAST_API_KEY in .Renviron")
+
+# ── Pull listings ─────────────────────────────────────────────────────────────
+resp <- request("https://api.rentcast.io/v1/listings/sale") |>
+  req_headers(
+    "Accept"    = "application/json",
+    "X-Api-Key" = api_key
+  ) |>
+  req_url_query(
+    latitude  = 27.076199,
+    longitude = -82.362253,
+    radius    = 1,
+    status    = "Active",
+    limit     = 500
+  ) |>
+  req_retry(max_tries = 3) |>
+  req_perform()
+
+if (resp_status(resp) >= 400)
+  stop("RentCast API error: HTTP ", resp_status(resp), "\n", resp_body_string(resp))
+
+listings_raw <- jsonlite::fromJSON(resp_body_string(resp), flatten = TRUE)
+cat("Fetched:", nrow(listings_raw), "listings\n")
+
+# ── Clip to St. Andrews plat boundary ────────────────────────────────────────
+plats <- sf::st_read("./data/plats/plats.shp", quiet = TRUE) |>
+  sf::st_union()
+
+listings_sf <- sf::st_as_sf(
+  listings_raw,
+  coords = c("longitude", "latitude"),
+  crs    = 4326,
+  remove = FALSE
+)
+
+in_plat  <- lengths(sf::st_within(listings_sf, plats)) > 0
+listings <- listings_raw[in_plat, ]
+cat("After plat clip:", nrow(listings), "listings\n")
+
+# ── Select and clean columns ──────────────────────────────────────────────────
+listings <- listings |>
+  transmute(
+    listed_date   = as.Date(listedDate),
+    address       = formattedAddress,
+    sqft          = as.numeric(squareFootage),
+    price         = as.numeric(price),
+    price_per_sqft = round(price / sqft, 0),
+    latitude,
+    longitude
+  ) |>
+  arrange(desc(listed_date))
+
+cat("Listings saved:", nrow(listings), "\n")
+saveRDS(listings, "./data/listings.rds")

renv.lock

@@ -1625,6 +1625,66 @@
       "Maintainer": "Hadley Wickham <hadley@posit.co>",
       "Repository": "P3M"
     },
+    "httr2": {
+      "Package": "httr2",
+      "Version": "1.2.2",
+      "Source": "Repository",
+      "Title": "Perform HTTP Requests and Process the Responses",
+      "Authors@R": "c( person(\"Hadley\", \"Wickham\", , \"hadley@posit.co\", role = c(\"aut\", \"cre\")), person(\"Posit Software, PBC\", role = c(\"cph\", \"fnd\")), person(\"Maximilian\", \"Girlich\", role = \"ctb\") )",
+      "Description": "Tools for creating and modifying HTTP requests, then performing them and processing the results. 'httr2' is a modern re-imagining of 'httr' that uses a pipe-based interface and solves more of the problems that API wrapping packages face.",
+      "License": "MIT + file LICENSE",
+      "URL": "https://httr2.r-lib.org, https://github.com/r-lib/httr2",
+      "BugReports": "https://github.com/r-lib/httr2/issues",
+      "Depends": [
+        "R (>= 4.1)"
+      ],
+      "Imports": [
+        "cli (>= 3.0.0)",
+        "curl (>= 6.4.0)",
+        "glue",
+        "lifecycle",
+        "magrittr",
+        "openssl",
+        "R6",
+        "rappdirs",
+        "rlang (>= 1.1.0)",
+        "vctrs (>= 0.6.3)",
+        "withr"
+      ],
+      "Suggests": [
+        "askpass",
+        "bench",
+        "clipr",
+        "covr",
+        "docopt",
+        "httpuv",
+        "jose",
+        "jsonlite",
+        "knitr",
+        "later (>= 1.4.0)",
+        "nanonext",
+        "otel (>= 0.2.0)",
+        "otelsdk (>= 0.2.0)",
+        "paws.common (>= 0.8.0)",
+        "promises",
+        "rmarkdown",
+        "testthat (>= 3.1.8)",
+        "tibble",
+        "webfakes (>= 1.4.0)",
+        "xml2"
+      ],
+      "VignetteBuilder": "knitr",
+      "Config/Needs/website": "tidyverse/tidytemplate",
+      "Config/testthat/edition": "3",
+      "Config/testthat/parallel": "true",
+      "Config/testthat/start-first": "resp-stream, req-perform",
+      "Encoding": "UTF-8",
+      "RoxygenNote": "7.3.3",
+      "NeedsCompilation": "no",
+      "Author": "Hadley Wickham [aut, cre], Posit Software, PBC [cph, fnd], Maximilian Girlich [ctb]",
+      "Maintainer": "Hadley Wickham <hadley@posit.co>",
+      "Repository": "CRAN"
+    },
     "janitor": {
       "Package": "janitor",
       "Version": "2.2.1",