Add Pawcast - Dog Walking Weather App

apps/pawcast/README.md

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+# Trigger review

apps/pawcast/manifest.yaml

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+---
+id: pawcast
+name: Pawcast
+summary: Dog Walking Weather App
+desc: A Tidbyt app that helps dog owners determine safe walking conditions based on current weather data. Pawcast displays temperature, humidity, heat index, and provides risk assessments for walking dogs in hot weather.
+author: JosephScharnweber
+filename: pawcast.star

apps/pawcast/pawcast.star

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+# Pawcast - safe dog-walk time from temp + humidity
+
+load("math.star", "math")
+load("render.star", "render")
+
+def clamp(x, lo, hi):
+    if x < lo:
+        return lo
+    if x > hi:
+        return hi
+    return x
+
+def heat_index_f(temp_f, rh):
+    T = float(temp_f)
+    R = float(rh)
+    HI = (-42.379 +
+          2.04901523 * T + 10.14333127 * R -
+          0.22475541 * T * R - 0.00683783 * T * T - 0.05481717 * R * R +
+          0.00122874 * T * T * R + 0.00085282 * T * R * R - 0.00000199 * T * T * R * R)
+    return clamp(HI, -40, 140)
+
+def risk_and_minutes(hi_f):
+    if hi_f < 80:
+        return ("Low Risk", "45-60 min")
+    if hi_f < 90:
+        return ("Med Risk", "30-45 min")
+    if hi_f < 100:
+        return ("High Risk", "15-20 min")
+    if hi_f < 110:
+        return ("Very High Risk", "5-10 min")
+    return ("Dangerous", "Skip")
+
+def risk_color(risk):
+    if risk == "Low Risk":
+        return "#61e827ff"  # green
+    if risk == "Med Risk":
+        return "#ffd900ff"  # yellow
+    if risk == "High Risk":
+        return "#ffa600ff"  # orange
+    if risk == "Very High Risk":
+        return "#fe0000ff"  # red
+    return "#000000ff"  # black
+
+def fmt_int(x):
+    return str(int(math.round(float(x))))
+
+# White text with 1px black outline (layered copies)
+def outlined_text(content, font = None, fill = "#FFFFFF", stroke = "#000000"):
+    base_args = {"content": content, "color": stroke}
+    if font != None:
+        base_args["font"] = font
+    fill_args = {"content": content, "color": fill}
+    if font != None:
+        fill_args["font"] = font
+
+    return render.Stack(children = [
+        render.Padding(pad = (1, 0, 0, 0), child = render.Text(**base_args)),  # down 1
+        render.Padding(pad = (0, 1, 0, 0), child = render.Text(**base_args)),  # left 1
+        render.Padding(pad = (0, 0, 1, 0), child = render.Text(**base_args)),  # up 1
+        render.Padding(pad = (0, 0, 0, 1), child = render.Text(**base_args)),  # right 1
+        render.Text(**fill_args),  # center (white)
+    ])
+
+def main(config):
+    # Inputs & defaults
+    if "temp_f" in config:
+        temp_f = float(config.get("temp_f"))
+    elif "temp_c" in config:
+        temp_f = float(config.get("temp_c")) * 9.0 / 5.0 + 32.0
+    else:
+        temp_f = 50.0
+    rh = float(config.get("humidity", 20))
+
+    hi = heat_index_f(temp_f, rh)
+    (risk, minutes) = risk_and_minutes(hi)
+
+    bg = risk_color(risk)
+    raw = fmt_int(temp_f) + " F  " + fmt_int(rh) + "%"
+
+    return render.Root(
+        child = render.Box(
+            width = 64,
+            height = 32,
+            color = bg,  # background = risk color
+            child = render.Padding(
+                pad = (1, 1, 1, 1),
+                child = render.Column(
+                    children = [
+                        # Top line: length of walk (only)
+                        outlined_text(minutes, font = "6x13"),
+                        # Middle line: temp + humidity
+                        outlined_text(raw),
+                        # Bottom line: risk description
+                        outlined_text(risk),
+                    ],
+                    main_align = "start",
+                    cross_align = "start",
+                ),
+            ),
+        ),
+    )