Class: Brick::AirtableApiCaller

Inherits:
Object
  • Object
show all
Extended by:
FancyGets
Defined in:
lib/generators/brick/airtable_api_caller.rb

Defined Under Namespace

Classes: AirtableTable

Class Method Summary collapse

Class Method Details

.https_get(uri, pat = nil) ⇒ Object 



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# File 'lib/generators/brick/airtable_api_caller.rb', line 129

def https_get(uri, pat = nil)
  uri = URI(uri) unless uri.is_a?(URI)
  https = Net::HTTP.new(uri.host, uri.port)
  request = Net::HTTP::Get.new("#{uri.path}?#{uri.query}")
  request['Authorization'] = "Bearer #{@bearer ||= pat}"
  response = Net::HTTP.start(uri.hostname, uri.port, { use_ssl: true }) do |http|
    http.request(request)
  end
  # if response.code&.to_i > 299
  # end
  JSON.parse(response.body)
end

.pick_tables(usage = :migrations) ⇒ Object 



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# File 'lib/generators/brick/airtable_api_caller.rb', line 8

def pick_tables(usage = :migrations)
  puts "In order to reference Airtable data you will need a Personal Access Token (PAT) which can be generated by referencing this URL:
  https://airtable.com/create/tokens
You need only #{usage == :migrations ? 'this scope:' : "these three scopes:
  data.records:read
  data.recordComments:read"}
  schema.bases:read

Please provide your Airtable PAT:"
  pat = gets_password
  pat = ENV['AIRTABLE_PAT'] if pat.blank?
  require 'net/http'
  # Generate a list of bases that can be chosen
  bases = https_get('https://api.airtable.com/v0/meta/bases', pat)
  base = gets_list(bases.fetch('bases', nil)&.map { |z| AirtableTable.new(z['id'], z['name']) })
  puts
  # Generate a list of tables that can be chosen
  objects = https_get("https://api.airtable.com/v0/meta/bases/#{base.id}/tables", pat).fetch('tables', nil)
  if objects.blank?
    puts "No tables found in base #{base.name}."
    return
  end

  tables = objects.map { |z| AirtableTable.new(z['id'], z['name'], z['primaryFieldId'], z['fields'], z['views'], base.id) }
  chosen = gets_list(tables, tables.dup)
  puts

  # Build out a '::Brick.relations' hash that represents this Airtable schema
  fks = []
  associatives = {}
  relations = chosen.each_with_object({}) do |table, s|
                tbl_name = sane_table_name(table.name)
                # Build out columns and foreign keys
                cols = {}
                table.fields.each do |col|
                  col_name = sane_name(col['name'])
                  # This is like a has_many or has_many through
                  if col['type'] == 'multipleRecordLinks'
                    # binding.pry if col['options']['isReversed']
                    if (frn_tbl = sane_table_name(
                                    chosen.find { |t| t.id == col['options']['linkedTableId'] }&.name
                                  ))
                      if col['options']['prefersSingleRecordLink'] # 1:M
                        fks << [frn_tbl, "#{col_name}_id", tbl_name, col_name]
                      else # N:M
                        # Queue up to build associative table with two foreign keys
                        camelized = (assoc_name = "#{tbl_name}_#{col_name}_#{frn_tbl}").camelize
                        if associatives.keys.any? { |a| a.camelize == camelized }
                          puts "Strangely have found two columns in \"#{table.name}\" with a name similar to \"#{col_name}\".  Skipping one to avoid a conflict."
                          next

                        end
                        associatives[assoc_name] = [col_name, frn_tbl, tbl_name]
                        fks << [assoc_name, frn_tbl, tbl_name, col_name.underscore, tbl_name]
                      end
                    end
                  else
                    # puts col['type']
                    dt = case col['type']
                    when 'singleLineText', 'url', 'email', 'singleSelect'
                      'string'
                    when 'multilineText'
                      'text'
                    when 'number', 'currency'
                      'decimal'
                    when 'checkbox'
                      'boolean'
                    when 'date'
                      'date'
                    when 'multipleSelects'
                      # Sqlite3 can do json
                      'json'
                    when 'formula', 'count', 'rollup', 'multipleAttachments'
                      next
                    # else
                    #   binding.pry
                    end
                    cols[col_name] = [dt, nil, true, false] # true is the col[:nillable]
                  end
                end
                # Put it all into a relation entry, named the same as the table
                pkey = table.fields.find { |f| f['id'] == table.primary_key }['name']
                s[tbl_name] = {
                  pkey: { "#{tbl_name}_pkey" => [sane_name(pkey)] },
                  cols: cols,
                  fks: {},
                  airtable_table: table
                }
              end
  associatives.each do |k, v|
    pri_fk_name = "#{v[1]}_id"
    frn_fk_base = (v[1] == v[2]) ? "#{v[2]}_2" : v[2] # Accommodates self-referencing N:Ms
    frn_fk_name = "#{frn_fk_base}_id"
    relations[k] = {
      pkey: { "#{k}_pkey" => ['id'] },
      cols: { 'id' => ['integer', nil, false, false] }
    }
    fks << [v[1], pri_fk_name, k, v[0].underscore]
    fks << [v[2], frn_fk_name, k, frn_fk_base.underscore]
  end
  fk_idx = 0
  fks.each do |pri_tbl, fk_col, frn_tbl, airtable_col, assoc_tbl|
    pri_pk_col = relations[pri_tbl][:pkey].first.last.first
    # binding.pry unless relations.key?(frn_tbl) && relations[pri_tbl][:cols][pri_pk_col]
    unless assoc_tbl # It's a 1:M -- make a FK column
      relations[frn_tbl][:cols][fk_col] = [relations[pri_tbl][:cols][pri_pk_col][0], nil, true, false]
    end
    # And the actual relation
    frn_fks = ((relations[frn_tbl] ||= {})[:fks] ||= {})
    this_fk = frn_fks["fk_airtable_#{fk_idx += 1}"] = {
      is_bt: !assoc_tbl, # Normal foreign key is true, and N:M is really a has_many, so false
      fk: fk_col,
      assoc_name: airtable_col,
      inverse_table: pri_tbl
    }
    this_fk[:assoc_tbl] = assoc_tbl if assoc_tbl
  end

  relations
end

.sane_name(col_name) ⇒ Object 



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# File 'lib/generators/brick/airtable_api_caller.rb', line 142

def sane_name(col_name)
  sane_table_name(col_name.gsub('&', 'and').tr('()?', '').tr('/', '_'))
end

.sane_table_name(tbl_name) ⇒ Object 



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# File 'lib/generators/brick/airtable_api_caller.rb', line 146

def sane_table_name(tbl_name)
  tbl_name&.downcase&.tr(': -', '_')
end