invoice form work

2 files changed, 251 insertions, 16 deletions

diff --git a/src/ui/ui_invoices.cpp b/src/ui/ui_invoices.cpp
index 2b5a834..036d85b 100644
--- a/src/ui/ui_invoices.cpp
+++ b/src/ui/ui_invoices.cpp
@@ -16,21 +16,136 @@ void ui_draw_address_form(address* buffer);
 static view_state current_view_state = view_state::LIST;
 static invoice active_invoice = {0};
 
+cost_center* cost_center_list_buffer = 0;
+country_tax_bracket* tax_bracket_list_buffer = 0;
+
 void draw_contact_form_ex(contact* buffer, bool viewing_only = false, bool with_autocomplete = false, bool* on_autocomplete = 0);
 
 void ui_setup_invoices()
 {
     current_view_state = view_state::LIST;
     active_invoice = administration_create_empty_invoice();
+
+    u32 costcenter_count = administration_get_cost_center_count();
+    cost_center_list_buffer = (cost_center*) malloc(sizeof(cost_center) * costcenter_count); // @leak
+
+    u32 tax_bracket_count = administration_get_tax_bracket_count();
+    tax_bracket_list_buffer = (country_tax_bracket*) malloc(sizeof(country_tax_bracket) * tax_bracket_count); // @leak
+}
+
+// TODO move custom ui functions to helpers.cpp
+
+void draw_tax_bracket_selector(char* tax_bracket_id)
+{
+    country_tax_bracket* selected_tax_bracket = NULL;
+
+    country_tax_bracket* buffer = tax_bracket_list_buffer;
+    u32 tax_bracket_count = administration_get_tax_brackets_for_country(buffer, administration_get_company_info().address.country_code);
+
+    // Select tax bracket by given id.
+    if (strlen(tax_bracket_id) > 0)
+    {
+        for (u32 i = 0; i < tax_bracket_count; i++)
+        {
+            if (strcmp(buffer[i].id, tax_bracket_id) == 0)
+            {
+                selected_tax_bracket = &buffer[i];
+                break;
+            }
+        }
+    }
+
+    int selected_tax_bracket_index = -1;
+    char rate_str_buf[20];
+    rate_str_buf[0] = 0;
+    if (selected_tax_bracket) 
+    {
+        if (strcmp(selected_tax_bracket->country_code, "00") == 0) snprintf(rate_str_buf, 20, "%s", localize(selected_tax_bracket->description));
+        else snprintf(rate_str_buf, 20, "%s/%.1f%%", selected_tax_bracket->country_code, selected_tax_bracket->rate);
+    }
+
+    if (ImGui::BeginCombo("##Tax Bracket", rate_str_buf))
+    {
+        for (u32 n = 0; n < tax_bracket_count; n++)
+        {
+            bool is_selected = selected_tax_bracket && strcmp(selected_tax_bracket->id, buffer[n].id) == 0;
+
+            if (strcmp(buffer[n].country_code, "00") == 0) snprintf(rate_str_buf, 20, "%s", localize(buffer[n].description));
+            else snprintf(rate_str_buf, 20, "%s/%.1f%%", buffer[n].country_code, buffer[n].rate);
+
+            if (ImGui::Selectable(rate_str_buf, is_selected)) {
+                selected_tax_bracket_index = n;
+            }
+        }
+        ImGui::EndCombo();
+    }
+    
+    if (selected_tax_bracket_index != -1) {
+        strops_copy(tax_bracket_id, buffer[selected_tax_bracket_index].id, 16);
+    }
+}
+
+bool draw_currency_selector(char* currency)
+{
+    int currentCurrency = 0;
+    bool result = false;
+
+    // Top 15 most traded currencies + all EU official currencies
+    const char* currencies[] = {
+         // Top 15
+        "EUR", "USD", "JPY", "GBP", "AUD", "CAD", "CHF",
+        "CNY", "HKD", "NZD", "SEK", "KRW", "SGD", "NOK", "MXN",
+
+        // Additional EU currencies
+        "BGN", // Bulgarian Lev
+        "CZK", // Czech Koruna
+        "DKK", // Danish Krone
+        "HUF", // Hungarian Forint
+        "PLN", // Polish Zloty
+        "RON", // Romanian Leu
+        // "HRK", // Croatian Kuna (legacy, replaced by EUR in 2023)
+    };
+    int currency_count = sizeof(currencies) / sizeof(char*);
+
+    if (strlen(currency) > 0)
+    {
+        for (int i = 0; i < currency_count; i++)
+        {
+            if (strcmp(currencies[i], currency) == 0)
+            {
+                currentCurrency = i;
+                break;
+            }
+        }
+    }
+
+    ImGui::SetNextItemWidth(100.0f);
+    if (ImGui::BeginCombo("##currency", currencies[currentCurrency]))
+    {
+        for (int n = 0; n < IM_ARRAYSIZE(currencies); n++)
+        {
+            bool isSelected = (currentCurrency == n);
+            if (ImGui::Selectable(currencies[n], isSelected))
+            {
+                result = true;
+                strops_copy(currency, currencies[n], CURRENCY_LENGTH);
+            }
+
+            if (isSelected)
+                ImGui::SetItemDefaultFocus();
+        }
+        ImGui::EndCombo();
+    }
+    
+    return result;
 }
 
 void draw_costcenter_selector(char* costcenter_id)
 {
     cost_center* selected_costcenter = NULL;
 
-    u32 costcenter_count = administration_get_cost_center_count();
-    cost_center* buffer = (cost_center*) malloc(sizeof(cost_center) * costcenter_count);
-    costcenter_count = administration_get_cost_centers(buffer);
+    cost_center* buffer = cost_center_list_buffer;
+    u32 costcenter_count = administration_get_cost_centers(buffer);
 
     // Select cost center by given id.
     if (strlen(costcenter_id) > 0)
@@ -61,8 +176,6 @@ void draw_costcenter_selector(char* costcenter_id)
     if (selected_costcenter_index != -1) {
         strops_copy(costcenter_id, buffer[selected_costcenter_index].id, 16);
     }
-
-    free(buffer);
 }
 
 void draw_project_selector(char* project_id)
@@ -106,9 +219,105 @@ void draw_project_selector(char* project_id)
     free(buffer);
 }
 
+static void draw_invoice_items_form(invoice* invoice)
+{
+    u32 invoice_items = administration_get_billing_items_count(invoice);
+    billing_item* buffer = (billing_item*)malloc(sizeof(billing_item) * invoice_items);
+    administration_get_all_billing_items_for_invoice(invoice, buffer);
+
+    if (ImGui::BeginTable("TableBillingItems", 8, ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg)) {
+
+        ImGui::TableSetupColumn("Amount", ImGuiTableColumnFlags_WidthFixed, 80);
+        ImGui::TableSetupColumn("Description");
+        ImGui::TableSetupColumn("Price", ImGuiTableColumnFlags_WidthFixed, 100);
+        ImGui::TableSetupColumn("Discount", ImGuiTableColumnFlags_WidthFixed, 100);
+        ImGui::TableSetupColumn("Net", ImGuiTableColumnFlags_WidthFixed, 100);
+        ImGui::TableSetupColumn("Tax %", ImGuiTableColumnFlags_WidthFixed, 170);
+        ImGui::TableSetupColumn("Tax", ImGuiTableColumnFlags_WidthFixed, 100);
+        ImGui::TableSetupColumn("Total", ImGuiTableColumnFlags_WidthFixed, 100);
+
+        //ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed, 100);
+        ImGui::TableHeadersRow();
+
+        for (u32 i = 0; i < invoice_items; i++)
+        {
+            billing_item item = buffer[i];
+
+            ImGui::TableNextRow();
+            
+            ImGui::PushID(i);
+            
+            ImGui::TableSetColumnIndex(0); 
+            ImGui::InputFloat("##amount", &item.amount, 0.0f, 0.0f, "%.0f");
+            ImGui::SameLine();
+
+            // Toggle between X and %
+            {
+                const char* items[] = { "X", "%" };
+                if (ImGui::BeginCombo("Mode", items[item.amount_is_percentage])) {
+                    for (int n = 0; n < 2; n++) {
+                        bool is_selected = (n == (int)item.amount_is_percentage);
+                        if (ImGui::Selectable(items[n], is_selected)) {
+                            item.amount_is_percentage = n;
+                        }
+                        if (is_selected) {
+                            ImGui::SetItemDefaultFocus();
+                        }
+                    }
+                    ImGui::EndCombo();
+                }
+            }
+
+            ImGui::TableSetColumnIndex(1); 
+            ImGui::InputText("##desc", item.description, IM_ARRAYSIZE(item.description));
+
+            ImGui::TableSetColumnIndex(2); 
+            ImGui::InputFloat("##price", &item.net_per_item, 0.0f, 0.0f, "%.2f");
+
+            ImGui::TableSetColumnIndex(3); 
+            ImGui::InputFloat("##discount", &item.discount, 0.0f, 0.0f, "%.0f");
+            ImGui::SameLine();
+
+            // Toggle between currency and %
+            {
+                const char* items[] = { item.currency, "%" };
+                if (ImGui::BeginCombo("Mode##discountMode", items[item.discount_is_percentage])) {
+                    for (int n = 0; n < 2; n++) {
+                        bool is_selected = (n == (int)item.discount_is_percentage);
+                        if (ImGui::Selectable(items[n], is_selected)) {
+                            item.discount_is_percentage = n;
+                        }
+                        if (is_selected) {
+                            ImGui::SetItemDefaultFocus();
+                        }
+                    }
+                    ImGui::EndCombo();
+                }
+            }
+
+            ImGui::TableSetColumnIndex(4); 
+            ImGui::Text("%.2f %s", item.net, item.currency);
+
+            ImGui::TableSetColumnIndex(5);
+            draw_tax_bracket_selector(item.tax_bracket_id);
+
+            ImGui::TableSetColumnIndex(6); 
+            ImGui::Text("%.2f %s", item.tax, item.currency);
+
+            ImGui::TableSetColumnIndex(7); 
+            ImGui::Text("%.2f %s", item.total, item.currency);
+
+            ImGui::PopID();
+
+            administration_update_billing_item_of_invoice(invoice, item);
+        }
+
+        ImGui::EndTable();
+    }
+}
+
 void draw_invoice_form(invoice* buffer, bool viewing_only = false)
 {
-    //float widthAvailable = ImGui::GetContentRegionAvail().x;
     ImGui::BeginDisabled();
 
     // 1. Identifier
@@ -122,7 +331,7 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
     // 3. Supplier (you)
     ImGui::Text("Supplier: %s", buffer->supplier.name);
 
-        // 6. Invoice issued at
+    // 4. Invoice issued at
     ImGui::BeginDisabled();
     tm issued_at_date = *gmtime(&buffer->issued_at);
     if (ImGui::DatePicker("##issuedAt", issued_at_date))
@@ -133,7 +342,7 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
     ImGui::Text("Invoice issued at");
     ImGui::EndDisabled();
 
-    // 7. Invoice expires at
+    // 5. Invoice expires at
     ImGui::BeginDisabled();
     tm expires_at_date = *gmtime(&buffer->expires_at);
     if (ImGui::DatePicker("##expiresAt", expires_at_date))
@@ -144,7 +353,7 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
     ImGui::Text("Invoice expires at");
     ImGui::EndDisabled();
 
-    // 8. Product/service delivered at
+    // 6. Product/service delivered at
     tm delivered_at_date = *gmtime(&buffer->delivered_at);
     if (ImGui::DatePicker("##deliveredAt", delivered_at_date))
     {
@@ -155,7 +364,7 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
 
     ImGui::Separator();
 
-    // 4. Customer information
+    // 7. Customer information
     ImGui::Text("Billing information");
     bool on_autocomplete;
     draw_contact_form_ex(&buffer->customer, false, true, &on_autocomplete);
@@ -164,7 +373,7 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
         strops_copy(buffer->customer_id, buffer->customer.id, sizeof(buffer->customer_id));
     }
 
-    // 5. (optional) shipping address.
+    // 8. (optional) shipping address.
     static bool shipping_is_billing_addr = true;
     ImGui::Checkbox("Shipping information is billing information", &shipping_is_billing_addr);
     if (!shipping_is_billing_addr) {
@@ -180,9 +389,33 @@ void draw_invoice_form(invoice* buffer, bool viewing_only = false)
     // 10. Cost center selection
     draw_costcenter_selector(buffer->cost_center_id);
 
-    //ImGui::SetNextItemWidth(widthAvailable*0.5f);
-    //ImGui::InputTextWithHint("Invoice number", "Invoice number", buffer->sequential_number, IM_ARRAYSIZE(buffer->sequential_number));
-    //ImGui::SameLine();ui_helper_draw_required_tag();
+    ImGui::Separator();
+    ImGui::Spacing();
+    ImGui::Spacing();
+    ImGui::Spacing();
+
+    // 11. New billing item button.
+    if (ImGui::Button(localize("+ Billing item")))
+    {
+        billing_item item = administration_create_empty_billing_item();
+        administration_add_billing_item_to_invoice(buffer, item);
+    }
+
+    // 12. Dropdown for invoice currency.
+    ImGui::SameLine();
+    ImGui::Text("| Currency: ");
+    ImGui::SameLine();
+    if (draw_currency_selector(buffer->currency))
+    {
+        administration_invoice_set_currency(buffer, buffer->currency);
+    }
+
+    // 13. Invoice items form
+    draw_invoice_items_form(buffer);
+
+    ImGui::Separator();
+
+    // 14. Totals overview.
     
     if (viewing_only) ImGui::EndDisabled();
 }
@@ -193,7 +426,7 @@ void draw_invoices_list()
     if (ImGui::Button(localize("form.create")))
     {
         current_view_state = view_state::CREATE;
-        active_invoice = administration_create_empty_invoice(); 
+        active_invoice = administration_create_empty_invoice(); // @leak
         active_invoice.supplier = administration_get_company_info();
         strops_copy(active_invoice.supplier_id, active_invoice.supplier.id, sizeof(active_invoice.supplier_id));
     }
diff --git a/src/ui/ui_main.cpp b/src/ui/ui_main.cpp
index 05a98b4..b4617d1 100644
--- a/src/ui/ui_main.cpp
+++ b/src/ui/ui_main.cpp
@@ -16,7 +16,7 @@ typedef enum
     END
 } dashboard_view_state;
 
-static dashboard_view_state dashboard_state = dashboard_view_state::INVOICES;
+static dashboard_view_state dashboard_state = dashboard_view_state::END;
 void (*drawcalls[dashboard_view_state::END])(void) = {
     ui_draw_invoices,
     0,
@@ -45,6 +45,8 @@ static void set_dashboard_state(dashboard_view_state state)
 
 void ui_draw_main()
 {
+    if (dashboard_state == dashboard_view_state::END) set_dashboard_state(dashboard_view_state::INVOICES);
+
     // @localize
     if (ImGui::BeginMainMenuBar())
     {