init with perl stuff

1 files changed, 106 insertions, 0 deletions

diff --git a/perl/count_repeat_customers.pl b/perl/count_repeat_customers.pl
new file mode 100644
index 0000000..f2873f4
--- /dev/null
+++ b/perl/count_repeat_customers.pl
@@ -0,0 +1,106 @@
+#!/usr/bin/perl
+
+use Text::CSV;
+use Data::Dumper;
+
+# cw_products
+# 0 id  1 sku  2 product_name
+
+# cw_skus
+# 0 sku_id  1 sku  2 product_id
+
+# cw_orders
+# 0 order_id  1 date  2 status  3 customer_id
+
+# cw_order_skus
+# 0 id  1 order_id  2 sku_id
+
+# cw_customers
+# 0 customer_id  1 customer_type  2 date_added  3 date_modified  4 first_name  5 last_name
+
+@products   = load_csv("cw_products.csv");
+@skus       = load_csv("cw_skus.csv");
+@orders     = load_csv("cw_orders.csv");
+@order_skus = load_csv("cw_order_skus.csv");
+@customers  = load_csv("cw_customers.csv");
+
+$product_name_lookup = {};
+for $product (@products) {
+  $sku  = $product->[1];
+  $name = $product->[2];
+  $product_name_lookup->{ $sku } = $name;
+}
+
+$customer_name_lookup = {};
+for $customer (@customers) {
+  $id = $customer->[0];
+  $name = $customer->[5] . " " . $customer->[4];
+  $customer_name_lookup->{ $id } = $name;
+}
+
+$sku_id_lookup = {};
+for $sku (@skus) {
+  $sku_id = $sku->[0];
+  $sku_name = $sku->[1];
+  $sku_id_lookup->{ $sku_id } = $sku_name;
+}
+
+$customers_seen = {};
+for $order (@orders) {
+  $order_id = $order->[0];
+  $customer_id = $order->[3];
+  if (exists( $customers_seen->{ $customer_id } )) {
+    # print $customer_name_lookup->{ $customer_id } . "\n";
+    $customers_seen->{ $customer_id } += 1;
+  }
+  else {
+    $customers_seen->{ $customer_id } = 1;
+  }
+}
+
+$repeat_customers = 0;
+$total_customers = 0;
+for $customer_id (keys %$customers_seen) {
+  $count = $customers_seen->{ $customer_id };
+  $total_customers += 1;
+  if ( $count > 1 ) {
+    # print $count . ": " . $customer_name_lookup->{ $customer_id } . "\n";
+    $repeat_customers += 1;
+  }
+}
+
+print "total customers: " . $total_customers . "\n";
+print "repeat customers: " . $repeat_customers . "\n";
+
+
+# print Dumper( $sku_id_lookup );
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+sub load_csv () {
+  my $filename = shift;
+  my @rows;
+  my $csv = Text::CSV->new ( { binary => 1 } )  # should set binary attribute.
+                 or die "Cannot use CSV: ".Text::CSV->error_diag ();
+ 
+  open my $fh, "<:encoding(utf8)", $filename or die "$filename: $!";
+  while ( my $row = $csv->getline( $fh ) ) {
+    push @rows, $row;
+  }
+  $csv->eof or $csv->error_diag();
+  close $fh;
+  return @rows;
+}
+