path: root/examples/sample_game.nom

run file "core.nom"
run file "lib/secrets.nom"


with secrets:
    rule: pending proposal ..=:
        secret %pending

    rule: propose source %src ..=:
        secret %pending =: %src
        say ".."
            |Proposal\%src\

    macro block: propose %action ..=: ".."
        |compiler:call("propose source %", \repr (%action's "src")\)

    rule: approve ..=:
        if (pending proposal):
            say ".."
                |Running\pending proposal\
            do (..)
                eval ".."
                    |return: \pending proposal\
        ..else:
            say "No action pending"

propose:
    say "motion passed."
    rule: fart ..=:
        say "poot"

approve
fart

# Users:
with secrets:
    secret %users =: lua expr "require('users')"
    rule: find user %name ..=:
        lua expr "secrets.users.by_name(vars.name) or compiler:error('Failed to find user: '..tostring(vars.name))"
    rule: add user %name ..=:
        lua expr "secrets.users.add(vars.name)"
    macro: @ %name_block ..=:
        %name_str =: lua expr "vars.name_block.value.value.src"
        ".."|compiler:call("find user %", \repr %name_str\)

say ".."|A user looks like: \@:spill\
say ".."|A user looks like: \@:spill\
add user "dave"
say ".."|A user looks like: \@:dave\
add user "moloch"
say ".."|A user looks like: \@:moloch\
add user "bruce"

# Inventory:
with secrets:
    secret %inventory =: lua expr ".."
        |setmetatable({}, {__index=function(self,key)
        |    local t = {}
        |    self[key] = t
        |    return t
        |end})
    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: %person's inventory ..=:
        (secret %inventory)->%person

    rule: %person's stock of %item ..=:
        %item =: canonicalize %item
        ((%person's inventory)->%item) or 0

    rule: %person's stock of %item as str ..=:
        %item =: canonicalize %item
        %count =: %person's stock of %item
        ".."
           |\%count\ \(singular %item) if (%count == 1) else (plural %item)\

    rule: give %person %count %item ..=:
        %item =: canonicalize %item
        (%person's inventory)-> %item =: (%person's stock of %item) + %count

    rule: give %person %count %item from %donor ..=:
        %item =: canonicalize %item
        if ((%donor's stock of %item) < %count):
            say ".."
                |\%donor\ does not have enough \%item\ to transfer
        ..else:
            (%person's inventory)->%item =: (%person's stock of %item) + %count
            (%donor's inventory)->%item =: (%donor's stock of %item) - %count

    rule:
        %person has %item
        %person has a %item
        %person has an %item
    ..=:
        (%person's stock of %item) > 0

give (@:bruce) 3 "hats"
give (@:bruce) 3 "hats"
give (@:dave) 1 "hat" from (@:bruce)
say ".."|Bruce has \(@:bruce)'s stock of "hats" as str\
say ".."|Dave has \(@:dave)'s stock of "hats" as str\
give (@:dave) 1 "box"
say ".."|Dave has \(@:dave)'s stock of "boxes" as str\
the plural of "goose" is "geese"
give (@:dave) 1 "goose"
say ".."|Dave has \(@:dave)'s stock of "geese" as str\
give (@:dave) 1 "goose"
say ".."|Dave has \(@:dave)'s stock of "geese" as str\

do:
    lua block "math.randomseed(os.time())"
    repeat until ((random number) < 0.01):
        say "tick"
        say "tock"










# A basic key-value store that's only accessible through these functions:
lua block ".."
    |do -- Use a closure to hide this behind the accessor rules
    |    local relations = setmetatable({}, {__index=function(self,key)
    |        local t = {}
    |        self[key] = t
    |        return t
    |    end})
    |    compiler:def("%key %relation ?", function(_,vars)
    |        return relations[vars.relation][vars.key]
    |    end)
    |    compiler:def("%key %relation = %value", function(_,vars)
    |        relations[vars.relation][vars.key] = vars.value
    |    end)
    |    compiler:def("* %relation = %value", function(_,vars)
    |        local result = {}
    |        for k,v in pairs(relations[vars.relation]) do
    |            if utils.equivalent(v, vars.value) then
    |                table.insert(result, k)
    |            end
    |        end
    |        return result
    |    end)
    |end

rule "set all * %relation = %value":
    for "key" in (* %relation = %value):
        %key %relation = %value

rule "you":
    lua expr "(you or 'Anonymous')"

rule ["make %person %action", "make %person do %action"]:
    lua block ".."
        |do
        |    local old_you = you
        |    you = vars.person
        |    ret = compiler:call('do %', vars.action)
        |    you = old_you
        |end

say "===================================================="
say "                    NEW GAME"
say "===================================================="
rule "everyone approves %action": yes

rule "with everyone's approval %action":
    if (everyone approves %action):
        do %action
    ..else:
        say "You do not have the will of the people! >:("

restrict "rule % %" to within "with everyone's approval %"
restrict "make % %" to within "with everyone's approval %"
restrict "set all * % = %" to within "with everyone's approval %"
restrict "% % = %" to within "with everyone's approval %"
restrict "restrict % to within %" to within "with everyone's approval %"

with everyone's approval:
    rule "propose %action":
        if ("pending proposal" "is" ?):
            say "Sorry, an action is already pending."
        ..else:
            say "Proposing..."
            "pending proposal" "is" = %action

    rule "unpropose":
        let "pending" = ("pending proposal" "is" ?)
        set all * %pending = (nil)
        "pending proposal" "is" = (nil)


    rule "mark %who as approving %action":
        %who %action = "approved"

    rule "mark %who as rejecting %action":
        %who %action = "rejected"

    rule ["approve", "vote yes", "vote yea"]:
        let "pending" = ("pending proposal" "is" ?)
        if (%pending == (nil)):
            say "Nothing is currently pending!"
            return
        mark (you) as approving %pending
        if (everyone approves %pending):
            say "The motion passes!"
            with everyone's approval %pending
            unpropose
        ..else:
            let "approvers" = (number of (* %pending = "approved"))
            let "num-players" = (number of (players))
            say ".."
                |\number of (* %pending = "approved")\/\number of (players)\ players have approved.

    rule ["reject", "vote no", "vote nay", "veto", "disapprove"]:
        let "pending" = ("pending proposal" "is" ?)
        if (%pending == (nil)):
            say "Nothing is currently pending!"
            return
        mark (you) as rejecting %pending
        unpropose

    rule ["players", "everyone", "everybody", "all players"]:
        * "is a player" = (yes)

    rule "join":
        (you) "is a player" = (yes)
        say ".."
            |Welcome to the game, \you\!

    allow "unpropose" to use "set all * % = %"
    allow ["join", "mark % as approving %", "mark % as rejecting %", "propose %", "unpropose"] to use "% % = %"
    restrict "unpropose" to within ["approve", "reject"]
    restrict "mark % as approving %" to within ["propose %", "approve"]
    restrict "mark % as rejecting %" to within ["propose %", "reject"]

    rule "everyone approves %action":
        (number of (players)) == (number of (* %action = "approved"))

join

propose:
    say "fart"
approve

propose:
    "democracy" "is possible" = (yes)
    if ("democracy" "is possible" ?):
        say "DEMOCRACY WORKS!!!"
approve

propose:
    rule "fart":
        say "poot"
    say "fart should have been defined"
approve
say "doop"
fart

propose:
    rule "open election %candidates":
        if ("candidates" "are" ?):
            say "An election is already in progress."
        ..else:
            "candidates" "are" = %candidates

    rule "close the election":
        set all * "votes for" = (nil)
        "candidates" "are" = (nil)

    rule "vote for %candidate":
        (you) "votes for" = %candidate
        let "vote-percent" = ((number of (* "votes for" = %candidate)) / (number of (players)))
        say ".."
            |Vote cast. \%candidate\ now has \100 * %vote-percent\% of the votes.
        if (%vote-percent > 0.5):
            say ".."|The winner of the election is: \%candidate\
            close the election

    allow ["open election %", "close the election", "vote for %"] to use ["% % = %"]
    allow ["close the election"] to use ["set all * % = %"]
approve

propose:
    rule "as bill %action":
        if ((you) == "Anonymous"):
            make "bill" do %action
        ..else:
            say ".."|Who do you think you are, \you\?
    allow ["as bill %"] to use ["make % %"]
approve
as bill: join

propose:
    rule "as dave %action":
        if ((you) == "Anonymous"):
            make "dave" do %action
        ..else:
            say ".."|Who do you think you are, \you\?
    allow ["as dave %"] to use ["make % %"]
approve
as bill: approve
as dave: join

open election ["tom", "dick", "harry"]
vote for "dick"
as bill: vote for "dick"

propose:
    rule "take a shit": say "shit taken."

approve
as bill: approve
as dave: approve
take a shit
say "Done."