Better handle localized values nested in code

[hangy]

openfoodfacts-server/lib/ProductOpener/Food.pm

Lines 91 to 127 in 64cda76

	sub normalize_nutriment_value_and_modifier($$) {
	my $value_ref = shift;
	my $modifier_ref = shift;
	if ($$value_ref =~ /nan/i) {
	$$value_ref = '';
	}
	if ($$value_ref =~ /(\&lt;=|<=|\N{U+2264})( )?/) {
	$$value_ref =~ s/(\&lt;=|<=|\N{U+2264})( )?//;
	$modifier_ref = "\N{U+2264}";
	}
	if ($$value_ref =~ /(\&lt;|<|max|maxi|maximum|inf|inférieur|inferieur|less)( )?/) {
	$$value_ref =~ s/(\&lt;|<|min|minimum|max|maxi|maximum|environ)( )?//;
	$$modifier_ref = '<';
	}
	if ($$value_ref =~ /(\&gt;=|>=|\N{U+2265})/) {
	$$value_ref =~ s/(\&gt;=|>=|\N{U+2265})( )?//;
	$modifier_ref = "\N{U+2265}";
	}
	if ($$value_ref =~ /(\&gt;|>|min|mini|minimum|greater|more)/) {
	$$value_ref =~ s/(\&gt;|>|min|mini|minimum|greater|more)( )?//;
	$$modifier_ref = '>';
	}
	if ($$value_ref =~ /(env|environ|about|~|≈)/) {
	$$value_ref =~ s/(env|environ|about|~|≈)( )?//;
	$$modifier_ref = '~';
	}
	if ($$value_ref =~ /trace|traces/) {
	$$value_ref = 0;
	$$modifier_ref = '~';
	}
	if ($$value_ref !~ /\./) {
	$$value_ref =~ s/,/\./;
	}
	}

This method contains several non-universal localized values, ie. "environ" or "inférieur", "less", "more". We should consider removing them from this method, and use some product language to evaluate the result.

[teolemon]

@hangy also, we need to make the nutrients translatable

[aleene]

There is now a nutriments.txt taxonomy with translations.

[teolemon]

We should rather make a list of such localizable parts of the code for easier access. Given the potential for regression, we're not going to move it outside the code.