First commit.

Vive le Castel Peter !

4 files changed, 47 insertions, 0 deletions

diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
new file mode 100644
index 0000000..de6be79
--- /dev/null
+++ b/app/helpers/application_helper.rb
@@ -0,0 +1,2 @@
+module ApplicationHelper
+end
diff --git a/app/helpers/dashboard_helper.rb b/app/helpers/dashboard_helper.rb
new file mode 100644
index 0000000..5d64d17
--- /dev/null
+++ b/app/helpers/dashboard_helper.rb
@@ -0,0 +1,8 @@
+module DashboardHelper
+  def fmt2(v) = number_with_precision(v, precision: 2)
+
+  # Total nitrogen (NO3-N + NH4-N)
+  def total_n(measurement)
+    (measurement.nno3.to_f) + (measurement.nnh4.to_f)
+  end
+end
diff --git a/app/helpers/nutrients_helper.rb b/app/helpers/nutrients_helper.rb
new file mode 100644
index 0000000..de98dc3
--- /dev/null
+++ b/app/helpers/nutrients_helper.rb
@@ -0,0 +1,21 @@
+module NutrientsHelper
+  NUTRIENTS = %i[nno3 p k ca mg s na cl si fe zn b mn cu mo nnh4].freeze
+
+  def percent_delta(measured, target)
+    return 0.0 if target.to_f.zero?
+    ((measured.to_f - target.to_f) / target.to_f) * 100.0
+  end
+
+  def fmt(v)
+    number_with_precision(v, precision: 2, strip_insignificant_zeros: true)
+  end
+
+  def delta_badge_class(delta)
+    d = delta.abs
+    case d
+    when d < 0 then "bg-info"
+    when 0..5 then "bg-secondary"
+    else "bg-warning"
+    end
+  end
+end
diff --git a/app/helpers/recipes_helper.rb b/app/helpers/recipes_helper.rb
new file mode 100644
index 0000000..02cb1a7
--- /dev/null
+++ b/app/helpers/recipes_helper.rb
@@ -0,0 +1,16 @@
+module RecipesHelper
+  def commercial_name_for(component)
+    # Try to find a FertilizerProduct via a join, but gracefully fallback.
+    if defined?(FertilizerProduct) && defined?(FertilizerComposition)
+      prod = FertilizerProduct.joins(:fertilizer_compositions)
+               .where(fertilizer_compositions: { fertilizer_component_id: component.id })
+               .first
+      return prod.name if prod&.name.present?
+    end
+    component.name.presence || component.formula
+  end
+
+  def fmt_kg(v)
+    number_with_precision(v.to_f, precision: 2, strip_insignificant_zeros: true)
+  end
+end