got most of the login functionality together

ui/amcontext.go

@@ -32,7 +32,9 @@ type AmContext interface {
 	RC() int
 	OutputType() string
 	Parameter(string) string
+	RemoteIP() string
 	Render(string) error
+	ReplaceUser(*database.User)
 	SubRender(string) ([]byte, error)
 	Session() *sessions.Session
 	SetOutputType(string)
@@ -121,6 +123,11 @@ func (c *amContext) Parameter(name string) string {
 	return rc
 }
 
+// RemoteIP returns the remote IP address.
+func (c *amContext) RemoteIP() string {
+	return c.echoContext.RealIP()
+}
+
 /* Render renders a template to the output. Called at the top level only.
  * Parameters:
  *     name = The name of the tempate to be rendered.
@@ -131,6 +138,14 @@ func (c *amContext) Render(name string) error {
 	return c.echoContext.Render(c.httprc, name, c)
 }
 
+/* ReplaceUser replaces the current user in the context.
+ * Parameters:
+ *     u - New user to associate with the context.
+ */
+func (c *amContext) ReplaceUser(u *database.User) {
+	c.session.Values["user_id"] = u.Uid
+}
+
 // Scratchpad returns the per-request scratchpad for values.
 func (c *amContext) Scratchpad() map[string]any {
 	if c.scratchpad == nil {

ui/dialog.go

@@ -124,6 +124,20 @@ func (d *Dialog) Render(ctxt AmContext) (string, any, error) {
 	return "framed_template", "dialog.jet", nil
 }
 
+/* RenderError sets up the rendering parameters to send this dialog to the output with an error message.
+ * Parameters:
+ *     ctxt - The AmContext for this request.
+ *     errormessage - The error message to be displayed.
+ * Returns:
+ *     Command string dictating what to be rendered.
+ *     Data as a parameter for the command string.
+ *     Standard Go error status.
+ */
+func (d *Dialog) RenderError(ctxt AmContext, errormessage string) (string, any, error) {
+	ctxt.VarMap().Set("amsterdam_errorMessage", errormessage)
+	return d.Render(ctxt)
+}
+
 /* LoadFromForm loads the values in a dialog from the form fields in the request.
  * Parameters:
  *     ctxt - The AmContext for this request.

ui/templates.go

@@ -21,6 +21,7 @@ import (
 	"strings"
 	"sync"
 	"time"
+	"unicode"
 
 	"git.erbosoft.com/amy/amsterdam/config"
 	"github.com/CloudyKit/jet/v6"
@@ -36,10 +37,13 @@ var static_views embed.FS
 // views is the main Jet template repository.
 var views *jet.Set
 
+// cachedCountryList is the cached country list after sorting.
 var cachedCountryList []countries.CountryCode = nil
 
+// countryListMutex control access to internalGetCountryList.
 var countryListMutex sync.Mutex
 
+// internalGetCountryList is a wrapper around countries.All() that sorts it by country name.
 func internalGetCountryList() []countries.CountryCode {
 	countryListMutex.Lock()
 	defer countryListMutex.Unlock()
@@ -126,6 +130,21 @@ func makeYearRange(a jet.Arguments) reflect.Value {
 	}
 }
 
+/* CapitalizeString changes the first character of trhe string to a capital.
+ * Parameters:
+ *     s - The string to be capitalized.
+ * Returns:
+ *     The capitalized string.
+ */
+func CapitalizeString(s string) string {
+	runes := []rune(s)
+	if len(runes) > 0 {
+		runes[0] = unicode.ToUpper(runes[0])
+		return string(runes)
+	}
+	return ""
+}
+
 // SetupTemplates is called to set up the template renderer after the configuration is loaded.
 func SetupTemplates() {
 	views = jet.NewSet(
@@ -143,6 +162,11 @@ func SetupTemplates() {
 	views.AddGlobalFunc("MakeIntRange", makeIntRange)
 	views.AddGlobalFunc("MakeYearRange", makeYearRange)
 
+	views.AddGlobalFunc("CapitalizeString", func(a jet.Arguments) reflect.Value {
+		s := a.Get(0).Convert(reflect.TypeFor[string]()).String()
+		return reflect.ValueOf(CapitalizeString(s))
+	})
+
 	// preload the country list in the background
 	go internalGetCountryList()
 }

ui/views/dialog.jet

@@ -25,6 +25,20 @@
         <p class="text-black text-sm mb-6">Required fields are marked with a <span class="text-red-600">*</span>.</p>
     {{ end }}
 
+    {{ if isset(amsterdam_errorMessage) }}
+        <!-- Error Message Banner -->
+        <div class="bg-red-100 border border-red-400 text-red-700 px-4 py-3 rounded mb-6 hidden" id="error-banner">
+            <div class="flex items-center">
+                <div class="flex-shrink-0">
+                    <span class="text-red-500 text-xl">⚠️</span>
+                </div>
+                <div class="ml-3">
+                    <p class="text-sm font-medium" id="error-message">{{ CapitalizeString(amsterdam_errorMessage) }}.</p>
+                </div>
+            </div>
+        </div>
+    {{ end }}
+
         <div class="bg-gray-50 p-6 rounded-lg">
             <div class="space-y-4">
                 {{ range amsterdam_dialog.Fields }}

ui/views/error.jet

@@ -12,7 +12,7 @@
             <h1 class="text-blue-800 text-4xl font-bold mb-2">Amsterdam Internal Server Error</h1>
             <hr class="border-2 border-gray-400 w-4/5 mb-4">
             <p class="text-black text-sm mb-4">
-                The Amsterdam server encountered an error: {{ error }}
+                The Amsterdam server encountered an error: {{ CapitalizeString(error) }}.
             </p>
             <p class="text-black text-sm mb-4">
                 <a href="/">Click here</a> to return to the home page.