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require "lib/core.nom"
require "lib/secrets.nom"

# Plurals
with secrets:
    lua block ".."
        |local endings = setmetatable({x="es",c="es",s="es"}, {__index=function() return "s" end})
        |secrets.plurals = setmetatable({}, {__index=function(self,key)
        |    return key..endings[key:sub(-1)]
        |end})
        |secrets.singulars = setmetatable({}, {__index=function(self,key)
        |    if key:sub(-2) == "es" and rawget(endings, key:sub(-3,-3)) then return key:sub(1,-3) end
        |    if key:sub(-1) == "s" then return key:sub(1,-2) end
        |    return key
        |end})
        |secrets.canonicals = setmetatable({}, {__index=function(self,key)
        |    if key:sub(-1) == "s" then return secrets.singulars[key] end
        |    return key
        |end})

    rule: the plural of %singular is %plural ..=:
        (secret %plurals)->%singular =: %plural
        (secret %singulars)->%plural =: %singular
        (secret %canonicals)->%plural =: %singular

    rule: singular %plural ..=:
        %plural in (secret %singulars)

    rule: plural %singular ..=:
        %singular in (secret %plurals)

    rule: canonicalize %item-name ..=:
        %item-name in (secret %canonicals)

    rule: rules that change plurals ..=: ["the plural of % is %"]