Got app working

children.go

@@ -1,6 +0,0 @@
-package main
-
-type Child struct {
-	Name  string
-	Money int
-}

db.go

@@ -53,7 +53,7 @@ func check_password(filename, attempt string) (result bool) {
 	return
 }
 
-func loadChildren(filename string) (children []Child) {
+func loadChildren(filename string) (children map[string]int) {
 	dbMutex.RLock()
 	defer dbMutex.RUnlock()
 	b, err := ioutil.ReadFile(filename)
@@ -66,3 +66,14 @@ func loadChildren(filename string) (children []Child) {
 	}
 	return
 }
+
+func dumpChildren(filename string, children map[string]int) {
+	dbMutex.Lock()
+	defer dbMutex.Unlock()
+    b, err := json.Marshal(children)
+	err = ioutil.WriteFile(filename, b, 0644)
+	if err != nil {
+		log.Fatal("serious issue writing children db file", err)
+	}
+	return
+}

handlers.go

@@ -1,7 +1,11 @@
 package main
 
 import (
+	"encoding/json"
+	"log"
 	"net/http"
+	"strconv"
+	"strings"
 )
 
 func homeHandler(w http.ResponseWriter, req *http.Request) {
@@ -35,3 +39,22 @@ func logoutHandler(w http.ResponseWriter, req *http.Request) {
 	http.Redirect(w, req, "/", http.StatusSeeOther)
 	return
 }
+
+func addHandler(w http.ResponseWriter, req *http.Request) {
+	path := req.URL.Path[len(addPath):]
+	bits := strings.Split(path, "/")
+	child := bits[0]
+	amount, err := strconv.Atoi(bits[1])
+	if err != nil {
+		log.Fatal("couldn't parse a dollar amount", err)
+	}
+	children := loadChildren(*db_file)
+	children[child] += amount
+	defer dumpChildren(*db_file, children)
+	w.Header().Set("Content-Type", "application/json")
+    b, err := json.Marshal(map[string]interface{}{
+        "amount": dollarize(children[child]),
+        "name": child,
+    })
+	w.Write(b)
+}

main.go

@@ -17,6 +17,8 @@ var template_dir = flag.String("templates", "templates", "template dir")
 var add_pw = flag.String("passwd", "", "add this pass to the db")
 var check_pw = flag.String("checkpw", "", "check if this pw is in db")
 
+var addPath = "/add/"
+
 var store = sessions.NewCookieStore([]byte("hello world"))
 var templates *template.Template
 
@@ -31,6 +33,7 @@ func main() {
 		http.HandleFunc("/", homeHandler)
 		http.HandleFunc("/login", loginHandler)
 		http.HandleFunc("/logout", logoutHandler)
+		http.HandleFunc(addPath, addHandler)
 		http.Handle("/s/", http.StripPrefix("/s/",
 			http.FileServer(http.Dir(*static_files))))
 		if err := http.ListenAndServe(*addr, nil); err != nil {

static/allowances.js

@@ -4,8 +4,9 @@ $(function() {
         $(this).next(".controls").toggle();
     });
     $(".btn").click(function(e) {
-        var amount = $(this)[0].value;
-        var name = $(this).parent().parent().parent().prev().find(".name").text();
-        console.log(name + " " + amount);
+        var target = $(this).val();
+        var req = $.get(target, function(data) {
+            $("." + data["name"]).next().text(data["amount"]);
+        });
     });
 });

templates/index.html

@@ -15,18 +15,18 @@
                 </tr>
             </thead>
             <tbody>
-                {{ range .children }}
+                {{ range $name, $money := .children }}
                 <tr class="child">
-                    <td class="name">{{ .Name }}</td>
-                    <td>{{ dollarize .Money }}</td>
+                    <td class="name {{ $name }}">{{ $name }}</td>
+                    <td class="amount">{{ dollarize $money }}</td>
                 </tr>
                 <tr class="controls">
                     <td colspan=2 style="text-align: center;">
                         <div class="btn-group">
-                            <button class="btn" value=100>$1.00</button>
-                            <button class="btn" value=25>25&cent;</button>
-                            <button class="btn" value=10>10&cent;</button>
-                            <button class="btn" value=5>5&cent;</button>
+                            <button class="btn" value="/add/{{ $name}}/100">$1.00</button>
+                            <button class="btn" value="/add/{{ $name}}/25">25&cent;</button>
+                            <button class="btn" value="/add/{{ $name}}/10">10&cent;</button>
+                            <button class="btn" value="/add/{{ $name}}/5">5&cent;</button>
                         </div>
                     </td>
                 </tr>