Add NWS weather API examples with Scittle

Implements 8 progressive ClojureScript weather demos:
- Simple location lookup
- Current conditions with unit conversion
- 7-day forecast viewer
- Hourly timeline
- Weather alerts
- Complete dashboard with tabs
- Reusable API client
- Integration documentation

Features zero-build Scittle setup, keyword arguments throughout,
parallel data fetching, and responsive styling.

Author: burinc

src/scittle/weather/complete_dashboard.cljs

@@ -0,0 +1,354 @@
+(ns scittle.weather.simple-lookup
+  "Simple weather lookup demo - minimal example showing basic API usage.
+   
+   This is the simplest possible weather app:
+   - Two input fields for coordinates
+   - One button to fetch weather
+   - Display location and temperature
+   
+   Demonstrates:
+   - Basic API call with keyword arguments
+   - Loading state
+   - Error handling
+   - Minimal Reagent UI"
+  (:require [reagent.core :as r]
+            [reagent.dom :as rdom]
+            [clojure.string :as str]))
+
+;; ============================================================================
+;; Inline API Functions (simplified for this demo)
+;; ============================================================================
+
+(defn fetch-json
+  "Fetch JSON from URL with error handling."
+  [{:keys [url on-success on-error]}]
+  (-> (js/fetch url)
+      (.then (fn [response]
+               (if (.-ok response)
+                 (.then (.json response)
+                        (fn [data]
+                          (on-success (js->clj data :keywordize-keys true))))
+                 (on-error (str "HTTP Error: " (.-status response))))))
+      (.catch (fn [error]
+                (on-error (.-message error))))))
+
+(defn fetch-weather-data
+  "Fetch basic weather data for coordinates."
+  [{:keys [lat lon on-success on-error]}]
+  (let [points-url (str "https://api.weather.gov/points/" lat "," lon)]
+    (fetch-json
+     {:url points-url
+      :on-success
+      (fn [points-result]
+         ;; Got points, now get forecast
+        (let [properties (get-in points-result [:properties])
+              forecast-url (:forecast properties)
+              city (:city (get-in points-result [:properties :relativeLocation :properties]))
+              state (:state (get-in points-result [:properties :relativeLocation :properties]))]
+
+           ;; Fetch the forecast
+          (fetch-json
+           {:url forecast-url
+            :on-success
+            (fn [forecast-result]
+              (let [periods (get-in forecast-result [:properties :periods])
+                    first-period (first periods)]
+                (on-success
+                 {:city city
+                  :state state
+                  :temperature (:temperature first-period)
+                  :temperatureUnit (:temperatureUnit first-period)
+                  :shortForecast (:shortForecast first-period)
+                  :detailedForecast (:detailedForecast first-period)})))
+            :on-error on-error})))
+      :on-error on-error})))
+
+;; ============================================================================
+;; Styles
+;; ============================================================================
+
+(def card-style
+  {:background "#ffffff"
+   :border "1px solid #e0e0e0"
+   :border-radius "8px"
+   :padding "20px"
+   :box-shadow "0 2px 4px rgba(0,0,0,0.1)"
+   :margin-bottom "20px"})
+
+(def input-style
+  {:width "100%"
+   :padding "10px"
+   :border "1px solid #ddd"
+   :border-radius "4px"
+   :font-size "14px"
+   :margin-bottom "10px"})
+
+(def button-style
+  {:background "#2196f3"
+   :color "white"
+   :border "none"
+   :padding "12px 24px"
+   :border-radius "4px"
+   :cursor "pointer"
+   :font-size "16px"
+   :width "100%"
+   :transition "background 0.3s"})
+
+(def button-hover-style
+  (merge button-style
+         {:background "#1976d2"}))
+
+(def button-disabled-style
+  (merge button-style
+         {:background "#ccc"
+          :cursor "not-allowed"}))
+
+;; ============================================================================
+;; Components
+;; ============================================================================
+
+(defn loading-spinner
+  "Simple loading indicator."
+  []
+  [:div {:style {:text-align "center"
+                 :padding "40px"}}
+   [:div {:style {:display "inline-block"
+                  :width "40px"
+                  :height "40px"
+                  :border "4px solid #f3f3f3"
+                  :border-top "4px solid #2196f3"
+                  :border-radius "50%"
+                  :animation "spin 1s linear infinite"}}]
+   [:style "@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }"]
+   [:p {:style {:margin-top "15px"
+                :color "#666"}}
+    "Fetching weather data..."]])
+
+(defn error-display
+  "Display error message."
+  [{:keys [error on-retry]}]
+  [:div {:style (merge card-style
+                       {:background "#ffebee"
+                        :border "1px solid #ef5350"})}
+   [:h4 {:style {:margin-top 0
+                 :color "#c62828"}}
+    "⚠️ Error"]
+   [:p {:style {:color "#666"}}
+    error]
+   (when on-retry
+     [:button {:on-click on-retry
+               :style {:background "#f44336"
+                       :color "white"
+                       :border "none"
+                       :padding "8px 16px"
+                       :border-radius "4px"
+                       :cursor "pointer"
+                       :margin-top "10px"}}
+      "Try Again"])])
+
+(defn weather-result
+  "Display weather results."
+  [{:keys [data]}]
+  [:div {:style card-style}
+   [:h2 {:style {:margin-top 0
+                 :color "#2196f3"}}
+    "📍 " (:city data) ", " (:state data)]
+
+   [:div {:style {:text-align "center"
+                  :margin "30px 0"}}
+    [:div {:style {:font-size "48px"
+                   :font-weight "bold"
+                   :color "#333"}}
+     (:temperature data) "°" (:temperatureUnit data)]
+    [:div {:style {:font-size "18px"
+                   :color "#666"
+                   :margin-top "10px"}}
+     (:shortForecast data)]]
+
+   [:div {:style {:background "#f5f5f5"
+                  :padding "15px"
+                  :border-radius "4px"
+                  :margin-top "20px"}}
+    [:p {:style {:margin 0
+                 :line-height 1.6
+                 :color "#555"}}
+     (:detailedForecast data)]]])
+
+(defn input-form
+  "Input form for coordinates."
+  [{:keys [lat lon on-lat-change on-lon-change on-submit loading? disabled?]}]
+  [:div {:style card-style}
+   [:h3 {:style {:margin-top 0}}
+    "🌍 Enter Coordinates"]
+   [:p {:style {:color "#666"
+                :font-size "14px"
+                :margin-bottom "15px"}}
+    "Enter latitude and longitude to get weather data"]
+
+   [:div
+    [:label {:style {:display "block"
+                     :margin-bottom "5px"
+                     :color "#555"
+                     :font-weight "500"}}
+     "Latitude"]
+    [:input {:type "number"
+             :step "0.0001"
+             :placeholder "e.g., 40.7128"
+             :value @lat
+             :on-change #(on-lat-change (.. % -target -value))
+             :disabled loading?
+             :style (merge input-style
+                           (when loading? {:opacity 0.6}))}]]
+
+   [:div
+    [:label {:style {:display "block"
+                     :margin-bottom "5px"
+                     :color "#555"
+                     :font-weight "500"}}
+     "Longitude"]
+    [:input {:type "number"
+             :step "0.0001"
+             :placeholder "e.g., -74.0060"
+             :value @lon
+             :on-change #(on-lon-change (.. % -target -value))
+             :disabled loading?
+             :style (merge input-style
+                           (when loading? {:opacity 0.6}))}]]
+
+   [:button {:on-click on-submit
+             :disabled (or loading? disabled?)
+             :style (cond
+                      loading? button-disabled-style
+                      disabled? button-disabled-style
+                      :else button-style)}
+    (if loading?
+      "Loading..."
+      "Get Weather")]])
+
+(defn quick-locations
+  "Quick access buttons for major cities."
+  [{:keys [on-select loading?]}]
+  [:div {:style {:margin-top "20px"}}
+   [:p {:style {:color "#666"
+                :font-size "14px"
+                :margin-bottom "10px"}}
+    "Or try these cities:"]
+   [:div {:style {:display "flex"
+                  :flex-wrap "wrap"
+                  :gap "8px"}}
+    (for [[city lat lon] [["Charlotte, NC" 35.2271 -80.8431]
+                          ["Miami, FL" 25.7617 -80.1918]
+                          ["Denver, CO" 39.7392 -104.9903]
+                          ["New York, NY" 40.7128 -74.0060]
+                          ["Los Angeles, CA" 34.0522 -118.2437]
+                          ["Chicago, IL" 41.8781 -87.6298]]]
+      ^{:key city}
+      [:button {:on-click #(on-select lat lon)
+                :disabled loading?
+                :style {:padding "6px 12px"
+                        :background (if loading? "#ccc" "transparent")
+                        :color (if loading? "#999" "#2196f3")
+                        :border "1px solid #2196f3"
+                        :border-radius "20px"
+                        :cursor (if loading? "not-allowed" "pointer")
+                        :font-size "13px"
+                        :transition "all 0.2s"}}
+       city])]])
+
+;; ============================================================================
+;; Main Component
+;; ============================================================================
+
+(defn main-component
+  "Main weather lookup component."
+  []
+  (let [lat (r/atom "35.2271")
+        lon (r/atom "-80.8431")
+        loading? (r/atom false)
+        error (r/atom nil)
+        weather-data (r/atom nil)
+
+        fetch-weather (fn [latitude longitude]
+                        (reset! loading? true)
+                        (reset! error nil)
+                        (reset! weather-data nil)
+
+                        (fetch-weather-data
+                         {:lat latitude
+                          :lon longitude
+                          :on-success (fn [data]
+                                        (reset! loading? false)
+                                        (reset! weather-data data))
+                          :on-error (fn [err]
+                                      (reset! loading? false)
+                                      (reset! error err))}))]
+
+    (fn []
+      [:div {:style {:max-width "600px"
+                     :margin "0 auto"
+                     :padding "20px"
+                     :font-family "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif"}}
+       [:h1 {:style {:text-align "center"
+                     :color "#333"
+                     :margin-bottom "30px"}}
+        "☀️ Simple Weather Lookup"]
+
+       ;; Input Form
+       [input-form
+        {:lat lat
+         :lon lon
+         :on-lat-change #(reset! lat %)
+         :on-lon-change #(reset! lon %)
+         :on-submit #(when (and (not (str/blank? @lat))
+                                (not (str/blank? @lon)))
+                       (fetch-weather @lat @lon))
+         :loading? @loading?
+         :disabled? (or (str/blank? @lat)
+                        (str/blank? @lon))}]
+
+       ;; Quick Locations
+       [quick-locations
+        {:on-select (fn [latitude longitude]
+                      (reset! lat (str latitude))
+                      (reset! lon (str longitude))
+                      (fetch-weather latitude longitude))
+         :loading? @loading?}]
+
+       ;; Loading State
+       (when @loading?
+         [loading-spinner])
+
+       ;; Error Display
+       (when @error
+         [error-display
+          {:error @error
+           :on-retry #(when (and (not (str/blank? @lat))
+                                 (not (str/blank? @lon)))
+                        (fetch-weather @lat @lon))}])
+
+       ;; Weather Results
+       (when @weather-data
+         [weather-result {:data @weather-data}])
+
+       ;; Instructions
+       (when (and (not @loading?)
+                  (not @error)
+                  (not @weather-data))
+         [:div {:style {:text-align "center"
+                        :margin-top "40px"
+                        :color "#999"
+                        :font-size "14px"}}
+          [:p "Enter coordinates above or click a city to get started"]
+          [:p {:style {:margin-top "10px"}}
+           "Uses the free NWS API - no API key required!"]])])))
+
+;; ============================================================================
+;; Mount
+;; ============================================================================
+
+(defn ^:export init []
+  (rdom/render [main-component]
+               (js/document.getElementById "simple-lookup-demo")))
+
+;; Auto-initialize when script loads
+(init)