Submit social housing lettings and sales data (CORE)
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require "csv"
class BulkUpload::Sales::Year2023::CsvParser
include CollectionTimeHelper
MAX_COLUMNS = 142
FORM_YEAR = 2023
attr_reader :path
def initialize(path:)
@path = path
end
def row_offset
if with_headers?
rows.find_index { |row| row[0].match(/field number/i) } + 1
else
0
end
end
def col_offset
with_headers? ? 1 : 0
end
def cols
@cols ||= ("A".."EK").to_a
end
def row_parsers
@row_parsers ||= body_rows.map do |row|
stripped_row = row[col_offset..]
hash = Hash[field_numbers.zip(stripped_row)]
BulkUpload::Sales::Year2023::RowParser.new(hash)
end
end
def body_rows
rows[row_offset..]
end
def rows
@rows ||= CSV.parse(normalised_string, row_sep:)
end
def column_for_field(field)
cols[field_numbers.find_index(field) + col_offset]
end
def wrong_template_for_year?
collection_start_year_for_date(first_record_start_date) != FORM_YEAR
rescue Date::Error
false
end
private
def default_field_numbers
[6, 3, 4, 5, nil, 28, 30, 38, 47, 51, 55, 59, 31, 39, 48, 52, 56, 60, 37, 46, 50, 54, 58, 35, 43, 49, 53, 57, 61, 32, 33, 78, 80, 79, 81, 83, 84, nil, 62, 66, 64, 65, 63, 67, 69, 70, 68, 76, 77, 16, 17, 18, 26, 24, 25, 27, 8, 91, 95, 96, 97, 92, 93, 94, 98, 100, 101, 103, 104, 106, 110, 111, 112, 113, 114, 9, 116, 117, 118, 120, 124, 125, 126, 10, 11, nil, 127, 129, 133, 134, 135, 1, 2, nil, 73, nil, 75, 107, 108, 121, 122, 130, 131, 82, 109, 123, 132, 115, 15, 86, 87, 29, 7, 12, 13, 14, 36, 44, 45, 88, 89, 102, 105, 119, 128, 19, 20, 21, 22, 23, 34, 40, 41, 42, 71, 72, 74, 85, 90, 99].map do |number|
if number.to_s.match?(/^[0-9]+$/)
"field_#{number}"
else
"field_blank"
end
end
end
def field_numbers
@field_numbers ||= if with_headers?
rows[row_offset - 1][col_offset..].map { |number| number.to_s.match?(/^[0-9]+$/) ? "field_#{number}" : "field_blank" }
else
default_field_numbers
end
end
def headers
@headers ||= ("field_1".."field_135").to_a
end
def with_headers?
rows.map { |r| r[0] }.any? { |cell| cell&.match?(/field number/i) }
end
def row_sep
"\n"
end
def normalised_string
return @normalised_string if @normalised_string
@normalised_string = File.read(path, encoding: "bom|utf-8")
@normalised_string.gsub!("\r\n", "\n")
@normalised_string.scrub!("")
@normalised_string
end
def first_record_start_date
if with_headers?
Date.new(row_parsers.first.field_4.to_i + 2000, row_parsers.first.field_3.to_i, row_parsers.first.field_2.to_i)
else
Date.new(rows.first[3].to_i + 2000, rows.first[2].to_i, rows.first[1].to_i)
end
end
end