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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
lib/modules/shop/import/csv_parser.ex
defmodule PhoenixKit.Modules.Shop.Import.CSVParser do
@moduledoc """
Parse Shopify CSV and group rows by Handle.
Shopify CSV structure:
- First row with product data contains title, description, etc.
- Subsequent rows for same Handle contain variant data only (empty title/description)
- Each variant row has Option1/Option2 values and prices
"""
NimbleCSV.define(ShopifyCSV, separator: ",", escape: "\"")
@doc """
Parse CSV file and group rows by Handle (product identifier).
Returns a map where keys are handles and values are lists of row maps.
## Examples
CSVParser.parse_and_group("/path/to/products.csv")
# => %{
# "product-handle" => [
# %{"Handle" => "product-handle", "Title" => "Product", ...},
# %{"Handle" => "product-handle", "Option1 Value" => "Small", ...},
# ...
# ],
# ...
# }
"""
def parse_and_group(file_path) do
{_headers, rows} =
file_path
|> File.stream!([:utf8])
|> ShopifyCSV.parse_stream(skip_headers: false)
|> Enum.reduce({nil, []}, fn
row, {nil, []} ->
# First row is headers
{row, []}
row, {headers, rows} ->
# Convert row to map using headers
row_map =
Enum.zip(headers, row)
|> Map.new()
{headers, [row_map | rows]}
end)
# Group by Handle and reverse to maintain order
rows
|> Enum.reverse()
|> Enum.group_by(& &1["Handle"])
end
@doc """
Get the first (main) row for a product group.
Contains title, description, and other product-level data.
"""
def main_row(rows) when is_list(rows) do
List.first(rows)
end
@doc """
Get all variant rows (rows with price data).
"""
def variant_rows(rows) when is_list(rows) do
Enum.filter(rows, fn row ->
price = row["Variant Price"]
price != nil and price != ""
end)
end
end