From d277d5c07b71aef1c8ba98957389b6028c4eec74 Mon Sep 17 00:00:00 2001
From: James Pattinson <james@pattinson.org>
Date: Sat, 7 Feb 2026 07:01:31 -0500
Subject: [PATCH] Notifications and printing

---
 frontend/app.js     | 190 +++++++++++++++++++++++++++++++++++++-------
 frontend/index.html |  52 ++++++++++++
 frontend/styles.css |  92 +++++++++++++++++++++
 3 files changed, 307 insertions(+), 27 deletions(-)

diff --git a/frontend/app.js b/frontend/app.js
index cbcfab4..6b0e00e 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -7,6 +7,37 @@ let expandedDrugs = new Set();
 let currentUser = null;
 let accessToken = null;
 
+// Toast notification system
+function showToast(message, type = 'info', duration = 3000) {
+    const container = document.getElementById('toastContainer');
+    if (!container) return;
+    
+    const toast = document.createElement('div');
+    toast.className = `toast ${type}`;
+    
+    const icons = {
+        success: '✓',
+        error: '✕',
+        warning: '⚠',
+        info: 'ℹ'
+    };
+    
+    toast.innerHTML = `
+        <span class="toast-icon">${icons[type] || icons.info}</span>
+        <span class="toast-message">${message}</span>
+    `;
+    
+    container.appendChild(toast);
+    
+    // Auto remove after duration
+    setTimeout(() => {
+        toast.classList.add('fade-out');
+        setTimeout(() => {
+            container.removeChild(toast);
+        }, 300);
+    }, duration);
+}
+
 // Initialize on page load
 document.addEventListener('DOMContentLoaded', () => {
     checkAuth();
@@ -139,11 +170,13 @@ function setupEventListeners() {
     const variantForm = document.getElementById('variantForm');
     const editVariantForm = document.getElementById('editVariantForm');
     const dispenseForm = document.getElementById('dispenseForm');
+    const prescribeForm = document.getElementById('prescribeForm');
     const editForm = document.getElementById('editForm');
     const addModal = document.getElementById('addModal');
     const addVariantModal = document.getElementById('addVariantModal');
     const editVariantModal = document.getElementById('editVariantModal');
     const dispenseModal = document.getElementById('dispenseModal');
+    const prescribeModal = document.getElementById('prescribeModal');
     const editModal = document.getElementById('editModal');
     const addDrugBtn = document.getElementById('addDrugBtn');
     const dispenseBtn = document.getElementById('dispenseBtn');
@@ -151,6 +184,7 @@ function setupEventListeners() {
     const cancelVariantBtn = document.getElementById('cancelVariantBtn');
     const cancelEditVariantBtn = document.getElementById('cancelEditVariantBtn');
     const cancelDispenseBtn = document.getElementById('cancelDispenseBtn');
+    const cancelPrescribeBtn = document.getElementById('cancelPrescribeBtn');
     const cancelEditBtn = document.getElementById('cancelEditBtn');
     const showAllBtn = document.getElementById('showAllBtn');
     const showLowStockBtn = document.getElementById('showLowStockBtn');
@@ -166,6 +200,7 @@ function setupEventListeners() {
     if (variantForm) variantForm.addEventListener('submit', handleAddVariant);
     if (editVariantForm) editVariantForm.addEventListener('submit', handleEditVariant);
     if (dispenseForm) dispenseForm.addEventListener('submit', handleDispenseDrug);
+    if (prescribeForm) prescribeForm.addEventListener('submit', handlePrescribeDrug);
     if (editForm) editForm.addEventListener('submit', handleEditDrug);
     
     if (addDrugBtn) addDrugBtn.addEventListener('click', () => openModal(addModal));
@@ -178,6 +213,7 @@ function setupEventListeners() {
     if (cancelVariantBtn) cancelVariantBtn.addEventListener('click', () => closeModal(addVariantModal));
     if (cancelEditVariantBtn) cancelEditVariantBtn.addEventListener('click', () => closeModal(editVariantModal));
     if (cancelDispenseBtn) cancelDispenseBtn.addEventListener('click', () => closeModal(dispenseModal));
+    if (cancelPrescribeBtn) cancelPrescribeBtn.addEventListener('click', () => closeModal(prescribeModal));
     if (cancelEditBtn) cancelEditBtn.addEventListener('click', closeEditModal);
     
     const closeHistoryBtn = document.getElementById('closeHistoryBtn');
@@ -358,6 +394,7 @@ function renderDrugs() {
                             </div>
                         </div>
                         <div class="variant-actions">
+                            <button class="btn btn-primary btn-small" onclick="prescribeVariant(${variant.id}, '${drug.name.replace(/'/g, "\\'")}', '${variant.strength.replace(/'/g, "\\'")}')">🏷️ Prescribe</button>
                             <button class="btn btn-success btn-small" onclick="dispenseVariant(${variant.id})">💊 Dispense</button>
                             <button class="btn btn-warning btn-small" onclick="openEditVariantModal(${variant.id})">Edit</button>
                             <button class="btn btn-danger btn-small" onclick="deleteVariant(${variant.id})">Delete</button>
@@ -435,10 +472,10 @@ async function handleAddDrug(e) {
         document.getElementById('initialVariantThreshold').value = '10';
         closeModal(document.getElementById('addModal'));
         await loadDrugs();
-        alert('Drug added successfully!');
+        showToast('Drug added successfully!', 'success');
     } catch (error) {
         console.error('Error adding drug:', error);
-        alert('Failed to add drug. Check the console for details.');
+        showToast('Failed to add drug. Check the console for details.', 'error');
     }
 }
 
@@ -453,7 +490,7 @@ async function handleDispenseDrug(e) {
     const notes = document.getElementById('dispenseNotes').value;
 
     if (!variantId || isNaN(quantity) || quantity <= 0 || !userName) {
-        alert('Please fill in all required fields (Drug Variant, Quantity > 0, Dispensed by)');
+        showToast('Please fill in all required fields (Drug Variant, Quantity > 0, Dispensed by)', 'warning');
         return;
     }
 
@@ -479,10 +516,10 @@ async function handleDispenseDrug(e) {
         document.getElementById('dispenseForm').reset();
         closeModal(document.getElementById('dispenseModal'));
         await loadDrugs();
-        alert('Drug dispensed successfully!');
+        showToast('Drug dispensed successfully!', 'success');
     } catch (error) {
         console.error('Error dispensing drug:', error);
-        alert('Failed to dispense drug: ' + error.message);
+        showToast('Failed to dispense drug: ' + error.message, 'error');
     }
 }
 
@@ -548,10 +585,10 @@ async function handleAddVariant(e) {
         closeModal(document.getElementById('addVariantModal'));
         await loadDrugs();
         renderDrugs();
-        alert('Variant added successfully!');
+        showToast('Variant added successfully!', 'success');
     } catch (error) {
         console.error('Error adding variant:', error);
-        alert('Failed to add variant. Check the console for details.');
+        showToast('Failed to add variant. Check the console for details.', 'error');
     }
 }
 
@@ -598,10 +635,10 @@ async function handleEditVariant(e) {
         closeModal(document.getElementById('editVariantModal'));
         await loadDrugs();
         renderDrugs();
-        alert('Variant updated successfully!');
+        showToast('Variant updated successfully!', 'success');
     } catch (error) {
         console.error('Error updating variant:', error);
-        alert('Failed to update variant. Check the console for details.');
+        showToast('Failed to update variant. Check the console for details.', 'error');
     }
 }
 
@@ -618,6 +655,105 @@ function dispenseVariant(variantId) {
     openModal(document.getElementById('dispenseModal'));
 }
 
+// Prescribe variant and print label
+function prescribeVariant(variantId, drugName, variantStrength, unit) {
+    // Set hidden fields
+    document.getElementById('prescribeVariantId').value = variantId;
+    document.getElementById('prescribeDrugName').value = drugName;
+    document.getElementById('prescribeVariantStrength').value = variantStrength;
+    document.getElementById('prescribeUnit').value = unit || 'units';
+    
+    // Pre-fill user name if available
+    if (currentUser) {
+        document.getElementById('prescribeUser').value = currentUser.username;
+    }
+    
+    // Set default expiry date to 1 month from now
+    const defaultExpiry = new Date();
+    defaultExpiry.setMonth(defaultExpiry.getMonth() + 1);
+    document.getElementById('prescribeExpiry').value = defaultExpiry.toISOString().split('T')[0];
+    
+    // Open prescribe modal
+    openModal(document.getElementById('prescribeModal'));
+}
+
+// Handle prescribe drug form submission
+async function handlePrescribeDrug(e) {
+    e.preventDefault();
+
+    const variantId = parseInt(document.getElementById('prescribeVariantId').value);
+    const drugName = document.getElementById('prescribeDrugName').value;
+    const variantStrength = document.getElementById('prescribeVariantStrength').value;
+    const unit = document.getElementById('prescribeUnit').value;
+    const quantity = parseFloat(document.getElementById('prescribeQuantity').value);
+    const animalName = document.getElementById('prescribeAnimal').value;
+    const dosage = document.getElementById('prescribeDosage').value;
+    const expiryDate = document.getElementById('prescribeExpiry').value;
+    const userName = document.getElementById('prescribeUser').value;
+    const notes = document.getElementById('prescribeNotes').value;
+
+    if (!variantId || isNaN(quantity) || quantity <= 0 || !animalName || !dosage || !expiryDate || !userName) {
+        showToast('Please fill in all required fields', 'warning');
+        return;
+    }
+
+    // Convert expiry date to DD/MM/YYYY format
+    const expiryParts = expiryDate.split('-');
+    const formattedExpiry = `${expiryParts[2]}/${expiryParts[1]}/${expiryParts[0]}`;
+
+    try {
+        // First, dispense the drug (decrement inventory)
+        const dispensingData = {
+            drug_variant_id: variantId,
+            quantity: quantity,
+            animal_name: animalName,
+            user_name: userName,
+            notes: notes || null
+        };
+
+        const dispenseResponse = await apiCall('/dispense', {
+            method: 'POST',
+            body: JSON.stringify(dispensingData)
+        });
+
+        if (!dispenseResponse.ok) {
+            const error = await dispenseResponse.json();
+            throw new Error(error.detail || 'Failed to dispense drug');
+        }
+
+        // Second, print the label
+        const labelData = {
+            variables: {
+                practice_name: "Many Tears Animal Rescue",
+                animal_name: animalName,
+                drug_name: `${drugName} ${variantStrength}`,
+                dosage: dosage,
+                quantity: `${quantity} ${unit}`,
+                expiry_date: formattedExpiry
+            }
+        };
+
+        const labelResponse = await apiCall('/labels/print', {
+            method: 'POST',
+            body: JSON.stringify(labelData)
+        });
+
+        if (!labelResponse.ok) {
+            console.error('Label printing failed, but drug was dispensed');
+            showToast('Drug prescribed successfully, but label printing failed', 'warning', 5000);
+        } else {
+            showToast('Drug prescribed and label sent to printer!', 'success');
+        }
+
+        document.getElementById('prescribeForm').reset();
+        closeModal(document.getElementById('prescribeModal'));
+        await loadDrugs();
+    } catch (error) {
+        console.error('Error prescribing drug:', error);
+        showToast('Failed to prescribe drug: ' + error.message, 'error');
+    }
+}
+
 // Delete variant
 async function deleteVariant(variantId) {
     if (!confirm('Are you sure you want to delete this variant?')) return;
@@ -631,10 +767,10 @@ async function deleteVariant(variantId) {
 
         await loadDrugs();
         renderDrugs();
-        alert('Variant deleted successfully!');
+        showToast('Variant deleted successfully!', 'success');
     } catch (error) {
         console.error('Error deleting variant:', error);
-        alert('Failed to delete variant. Check the console for details.');
+        showToast('Failed to delete variant. Check the console for details.', 'error');
     }
 }
 
@@ -730,10 +866,10 @@ async function handleEditDrug(e) {
 
         closeEditModal();
         await loadDrugs();
-        alert('Drug updated successfully!');
+        showToast('Drug updated successfully!', 'success');
     } catch (error) {
         console.error('Error updating drug:', error);
-        alert('Failed to update drug. Check the console for details.');
+        showToast('Failed to update drug. Check the console for details.', 'error');
     }
 }
 
@@ -749,10 +885,10 @@ async function deleteDrug(drugId) {
         if (!response.ok) throw new Error('Failed to delete drug');
 
         await loadDrugs();
-        alert('Drug deleted successfully!');
+        showToast('Drug deleted successfully!', 'success');
     } catch (error) {
         console.error('Error deleting drug:', error);
-        alert('Failed to delete drug. Check the console for details.');
+        showToast('Failed to delete drug. Check the console for details.', 'error');
     }
 }
 
@@ -776,12 +912,12 @@ async function handleChangePassword(e) {
     const confirmPassword = document.getElementById('confirmNewPassword').value;
     
     if (newPassword !== confirmPassword) {
-        alert('New passwords do not match!');
+        showToast('New passwords do not match!', 'warning');
         return;
     }
     
     if (newPassword.length < 1) {
-        alert('New password cannot be empty!');
+        showToast('New password cannot be empty!', 'warning');
         return;
     }
     
@@ -799,11 +935,11 @@ async function handleChangePassword(e) {
             throw new Error(error.detail || 'Failed to change password');
         }
 
-        alert('Password changed successfully!');
+        showToast('Password changed successfully!', 'success');
         closeModal(document.getElementById('changePasswordModal'));
     } catch (error) {
         console.error('Error changing password:', error);
-        alert('Failed to change password: ' + error.message);
+        showToast('Failed to change password: ' + error.message, 'error');
     }
 }
 
@@ -823,12 +959,12 @@ async function handleAdminChangePassword(e) {
     const confirmPassword = document.getElementById('adminChangePasswordConfirm').value;
     
     if (newPassword !== confirmPassword) {
-        alert('Passwords do not match!');
+        showToast('Passwords do not match!', 'warning');
         return;
     }
     
     if (newPassword.length < 1) {
-        alert('Password cannot be empty!');
+        showToast('Password cannot be empty!', 'warning');
         return;
     }
     
@@ -845,12 +981,12 @@ async function handleAdminChangePassword(e) {
             throw new Error(error.detail || 'Failed to change password');
         }
 
-        alert('Password changed successfully!');
+        showToast('Password changed successfully!', 'success');
         closeModal(document.getElementById('adminChangePasswordModal'));
         openUserManagement();
     } catch (error) {
         console.error('Error changing password:', error);
-        alert('Failed to change password: ' + error.message);
+        showToast('Failed to change password: ' + error.message, 'error');
     }
 }
 
@@ -932,11 +1068,11 @@ async function createUser(e) {
 
         document.getElementById('newUsername').value = '';
         document.getElementById('newUserPassword').value = '';
-        alert('User created successfully!');
+        showToast('User created successfully!', 'success');
         openUserManagement();
     } catch (error) {
         console.error('Error creating user:', error);
-        alert('Failed to create user: ' + error.message);
+        showToast('Failed to create user: ' + error.message, 'error');
     }
 }
 
@@ -949,10 +1085,10 @@ async function deleteUser(userId) {
 
         if (!response.ok) throw new Error('Failed to delete user');
 
-        alert('User deleted successfully!');
+        showToast('User deleted successfully!', 'success');
         openUserManagement();
     } catch (error) {
         console.error('Error deleting user:', error);
-        alert('Failed to delete user: ' + error.message);
+        showToast('Failed to delete user: ' + error.message, 'error');
     }
 }
diff --git a/frontend/index.html b/frontend/index.html
index 32da6c1..7505912 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -7,6 +7,9 @@
     <link rel="stylesheet" href="styles.css">
 </head>
 <body>
+    <!-- Toast Notification Container -->
+    <div id="toastContainer" class="toast-container"></div>
+
     <!-- Login Page -->
     <div id="loginPage" class="login-page">
         <div class="login-container">
@@ -196,6 +199,55 @@
             </div>
         </div>
 
+        <!-- Prescribe Drug Modal -->
+        <div id="prescribeModal" class="modal">
+            <div class="modal-content">
+                <span class="close">&times;</span>
+                <h2>Prescribe Drug & Print Label</h2>
+                <form id="prescribeForm" novalidate>
+                    <input type="hidden" id="prescribeVariantId">
+                    <input type="hidden" id="prescribeDrugName">
+                    <input type="hidden" id="prescribeVariantStrength">
+                    <input type="hidden" id="prescribeUnit">
+                    
+                    <div class="form-group">
+                        <label for="prescribeQuantity">Quantity *</label>
+                        <input type="number" id="prescribeQuantity" step="0.1" required>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="prescribeAnimal">Animal Name/ID *</label>
+                        <input type="text" id="prescribeAnimal" required>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="prescribeDosage">Dosage Instructions *</label>
+                        <input type="text" id="prescribeDosage" placeholder="e.g., 1 tablet twice daily with food" required>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="prescribeExpiry">Expiry Date *</label>
+                        <input type="date" id="prescribeExpiry" required>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="prescribeUser">Prescribed by *</label>
+                        <input type="text" id="prescribeUser" required>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="prescribeNotes">Notes</label>
+                        <input type="text" id="prescribeNotes" placeholder="Optional">
+                    </div>
+                    
+                    <div class="form-actions">
+                        <button type="submit" class="btn btn-primary">Prescribe & Print Label</button>
+                        <button type="button" class="btn btn-secondary" id="cancelPrescribeBtn">Cancel</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+
         <!-- Add Variant Modal -->
         <div id="addVariantModal" class="modal">
             <div class="modal-content">
diff --git a/frontend/styles.css b/frontend/styles.css
index 5ce66db..9fa7ff4 100644
--- a/frontend/styles.css
+++ b/frontend/styles.css
@@ -947,3 +947,95 @@ footer {
         flex-wrap: wrap;
     }
 }
+/* Toast Notifications */
+.toast-container {
+    position: fixed;
+    top: 20px;
+    right: 20px;
+    z-index: 10000;
+    display: flex;
+    flex-direction: column;
+    gap: 10px;
+    pointer-events: none;
+}
+
+.toast {
+    background: var(--white);
+    padding: 16px 24px;
+    border-radius: 8px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    min-width: 300px;
+    max-width: 400px;
+    pointer-events: auto;
+    animation: slideIn 0.3s ease-out;
+    border-left: 4px solid var(--primary-color);
+}
+
+.toast.success {
+    border-left-color: var(--success-color);
+}
+
+.toast.error {
+    border-left-color: var(--danger-color);
+}
+
+.toast.warning {
+    border-left-color: var(--warning-color);
+}
+
+.toast.info {
+    border-left-color: var(--secondary-color);
+}
+
+.toast-icon {
+    font-size: 1.5em;
+    flex-shrink: 0;
+}
+
+.toast-message {
+    flex: 1;
+    color: var(--text-dark);
+    font-size: 0.95em;
+}
+
+.toast.fade-out {
+    animation: fadeOut 0.3s ease-out forwards;
+}
+
+@keyframes slideIn {
+    from {
+        transform: translateX(400px);
+        opacity: 0;
+    }
+    to {
+        transform: translateX(0);
+        opacity: 1;
+    }
+}
+
+@keyframes fadeOut {
+    from {
+        transform: translateX(0);
+        opacity: 1;
+    }
+    to {
+        transform: translateX(400px);
+        opacity: 0;
+    }
+}
+
+@media (max-width: 768px) {
+    .toast-container {
+        top: 10px;
+        right: 10px;
+        left: 10px;
+    }
+    
+    .toast {
+        min-width: auto;
+        width: 100%;
+    }
+}
\ No newline at end of file