Hide total in columns

Helper/FinanceHelper.php

@@ -19,6 +19,13 @@ class FinanceHelper extends Base
     const INSTALLMENT_CURRENT_KEY = 'financebuddy_installment_current';
     const INSTALLMENT_TOTAL_KEY = 'financebuddy_installment_total';
 
+    // Per-column opt-out of the header total. Stored per column in PROJECT metadata as
+    // financebuddy_hide_total_<column_id> = 'on' (hidden) or 'off' (shown, the default). Literal
+    // on/off, never 1/0, so the flag is never dropped by the metadata save (PHP empty("0") === true).
+    const HIDE_TOTAL_PREFIX = 'financebuddy_hide_total_';
+    const HIDE_TOTAL_ON = 'on';
+    const HIDE_TOTAL_OFF = 'off';
+
     // Hidden marker present only when the task form was submitted with the finance fieldset, so
     // non-finance task updates (moves, API calls) are ignored by the persistence hooks.
     const FORM_MARKER = 'financebuddy_form';
@@ -110,6 +117,18 @@ class FinanceHelper extends Base
         return $net;
     }
 
+    /**
+     * Has this column's header total been hidden (per-column opt-out)?
+     *
+     * @param  integer $project_id
+     * @param  integer $column_id
+     * @return bool
+     */
+    public function isTotalHidden($project_id, $column_id)
+    {
+        return $this->projectMetadataModel->get((int) $project_id, self::HIDE_TOTAL_PREFIX.(int) $column_id, self::HIDE_TOTAL_OFF) === self::HIDE_TOTAL_ON;
+    }
+
     /**
      * Values to prefill the task-form fields: a re-post (after a validation error) wins, then the
      * stored metadata for an existing task, otherwise blanks for a new task.