remove product form

abrechenbarkeit.lua

@@ -157,8 +157,8 @@ local function read_products()
         if l == "" or l == nil then
             return nil
         end
-        local barcode, amount, name = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*)")
-        return barcode, tonumber(amount), name
+        local barcode, price, name = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*)")
+        return barcode, tonumber(price), name
     end
 end
 
@@ -350,9 +350,74 @@ local function r_create_user()
     return redirect(string.format("/%s", urlencode(username)))
 end
 
+local function r_products_post()
+    local data = form_data()
+    local barcode = data.barcode
+    if barcode == nil then
+        return error_box("barcode unset")
+    end
+    if barcode:match("^[%w_-]*$") == nil then
+        return error_box("barcode invalid")
+    end
+    if data.delete then
+        local new_products = io.open("products.new", "w+")
+        if new_products == nil then
+            return error_box("failed to open new products")
+        end
+        for a_barcode, price, name in read_products() do
+            if barcode ~= a_barcode then
+                new_products:write(string.format("%s,%d,%s\n", a_barcode, price, name))
+            end
+        end
+        new_products:flush()
+        new_products:close()
+        os.rename("products.new", "products")
+    else
+        local price = tonumber(data.price)
+        local name = data.name
+        if price == nil then
+            return error_box("price invalid")
+        end
+        if name:match("^[%w_ -]*$") == nil then
+            return error_box("name invalid")
+        end
+        local products = io.open("products", "a+")
+        if products == nil then
+            return error_box("failed to open products")
+        end
+        products:write(string.format("%s,%d,%s\n", barcode, price, name))
+        products:flush()
+        products:close()
+    end
+end
+
 local function r_products()
-    respond(200, "Abrechenbare Products", function()
+    local notif = nil
+    if method == "POST" then
+        notif = r_products_post()
+    end
+    respond(200, "Abrechenbare Product List", function()
         print("<h1>Product List</h1>")
+        if notif then print(notif) end
+        print([[
+            <form action="/?products" method="POST" class="box">
+                <h3>Add Product</h3>
+                <label for="barcode">Barcode: </label>
+                <input type="text" name="barcode" id="barcode" /><br/>
+                <label for="name">Name: </label>
+                <input type="text" name="name" id="name" /><br/>
+                <label for="price">Price: </label>
+                <input type="number" name="price" id="price" /><br/>
+                <input type="submit" value="Add" />
+            </form>
+            <form action="/?products" method="POST" class="box">
+                <h3>Remove Product</h3>
+                <input type="text" name="delete" value="1" hidden />
+                <label for="barcode">Barcode: </label>
+                <input type="text" name="barcode" id="barcode" /><br/>
+                <input type="submit" value="Remove" />
+            </form>
+        ]])
         print("<table><tr><th>Name</th><th>Price</th><th>Barcode</th></tr>")
         for barcode, price, name in read_products() do
             print(string.format([[

collapse_log.lua

@@ -15,7 +15,6 @@ local function read_log()
     end
 end
 
-
 local function balances()
     local users = {}
     for _, username, amount, _ in read_log() do