Class: KBIndex

Inherits:
Object show all
Includes:
KBTypeConversionsMixin
Defined in:
lib/og/vendor/kirbybase.rb

Overview

KBIndex

Constant Summary collapse

UNENCODE_RE = 
/&(?:amp|linefeed|carriage_return|substitute|pipe);/

Instance Method Summary collapse

Methods included from KBTypeConversionsMixin

#convert_to

Constructor Details

#initialize(table, index_fields) ⇒ KBIndex

initialize



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# File 'lib/og/vendor/kirbybase.rb', line 2506

def initialize(table, index_fields)
    @last_update = Time.new
    @idx_arr = []
    @table = table
    @index_fields = index_fields
    @col_poss = index_fields.collect {|i| table.field_names.index(i) }
    @col_names = index_fields
    @col_types = index_fields.collect {|i|
     table.field_types[table.field_names.index(i)]}
end

Instance Method Details

#add_index_rec(rec) ⇒ Object

add_index_rec



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# File 'lib/og/vendor/kirbybase.rb', line 2585

def add_index_rec(rec)
    @idx_arr << @col_poss.zip(@col_types).collect do |col_pos, col_type|
        convert_to(col_type, rec[col_pos])
     end + [rec.first.to_i]
     
    @last_update = Time.new 
end

#delete_index_rec(recno) ⇒ Object

delete_index_rec



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# File 'lib/og/vendor/kirbybase.rb', line 2596

def delete_index_rec(recno)
    i = @idx_arr.rassoc(recno.to_i)
    @idx_arr.delete_at(@idx_arr.index(i)) unless i.nil?
    @last_update = Time.new
end

#get_idx ⇒ Object

get_idx



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# File 'lib/og/vendor/kirbybase.rb', line 2520

def get_idx
    return @idx_arr
end

#get_timestamp ⇒ Object

get_timestamp



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# File 'lib/og/vendor/kirbybase.rb', line 2527

def get_timestamp
    return @last_update
end

#rebuild(fptr) ⇒ Object

rebuild



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# File 'lib/og/vendor/kirbybase.rb', line 2534

def rebuild(fptr)
    @idx_arr.clear

    encrypted = @table.encrypted?

    # Skip header rec.
    fptr.readline

    begin
        # Loop through table.
        while true
            line = fptr.readline

            line = unencrypt_str(line) if encrypted
            line.strip!

            # If blank line (i.e. 'deleted'), skip it.
            next if line == ''

            # Split the line up into fields.
            rec = line.split('|', @col_poss.max+2)

            # Create the index record by pulling out the record fields
            # that make up this index and converting them to their
            # native types.
            idx_rec = []
            @col_poss.zip(@col_types).each do |col_pos, col_type|
                idx_rec << convert_to(col_type, rec[col_pos])
            end

            # Were all the index fields for this record equal to NULL?
            # Then don't add this index record to index array; skip to
            # next record.
            next if idx_rec.compact.empty?

            # Add recno to the end of this index record.
            idx_rec << rec.first.to_i

            # Add index record to index array.
            @idx_arr << idx_rec
        end
    # Here's how we break out of the loop...
    rescue EOFError
    end
    
    @last_update = Time.new
end

#update_index_rec(rec) ⇒ Object

update_index_rec



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# File 'lib/og/vendor/kirbybase.rb', line 2605

def update_index_rec(rec)
    delete_index_rec(rec.first.to_i)
    add_index_rec(rec)
end