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# Minimal JSON encoder (this mruby gembox has no JSON gem). Shared by the agent
# bridge (R1) and the Log pipeline (R2). Handles the value types we actually emit:
# nil/true/false, Integer, Float (non-finite -> null, since NaN/Infinity are not
# valid JSON), String, Symbol, Array, Hash. Anything else falls back to its to_s.
# Byte-wise string escaping: bytes >= 0x20 pass through, so UTF-8 multibyte
# sequences (all bytes >= 0x80) are preserved.
module Jamstack
module JSON
class << self
def generate(o)
s = ""
emit(o, s)
s
end
private
def emit(o, s)
case o
when nil then s << 'null'
when true then s << 'true'
when false then s << 'false'
when Integer then s << o.to_s
when Float then s << (o.finite? ? o.to_s : 'null')
when String then estr(o, s)
when Symbol then estr(o.to_s, s)
when Array
s << '['
first = true
o.each { |e| s << ',' unless first; first = false; emit(e, s) }
s << ']'
when Hash
s << '{'
first = true
o.each do |k, v|
s << ',' unless first
first = false
estr(k.to_s, s)
s << ':'
emit(v, s)
end
s << '}'
else
estr(o.to_s, s)
end
end
def estr(str, s)
s << '"'
str.each_byte do |b|
case b
when 34 then s << '\\"'
when 92 then s << '\\\\'
when 10 then s << '\\n'
when 9 then s << '\\t'
when 13 then s << '\\r'
else
s << (b < 0x20 ? format('\\u%04x', b) : b.chr)
end
end
s << '"'
end
end
end
end
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