_jxon.ahk

;;;; AHK v2 - https://github.com/TheArkive/JXON_ahk2
;MIT License
;Copyright (c) 2021 TheArkive
;Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
;The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
;THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
;
; Example ===================================================================================
; ===========================================================================================

; Msgbox "The idea here is to create several nested arrays, save to text with jxon_dump(), and then reload the array with jxon_load().  The resulting array should be the same.`r`n`r`nThis is what this example shows."
; a := Map(), b := Map(), c := Map(), d := Map(), e := Map(), f := Map() ; Object() is more technically correct than {} but both will work.

; d["g"] := 1, d["h"] := 2, d["i"] := ["purple","pink","pippy red"]
; e["g"] := 1, e["h"] := 2, e["i"] := Map("1","test1","2","test2","3","test3")
; f["g"] := 1, f["h"] := 2, f["i"] := [1,2,Map("a",1.0009,"b",2.0003,"c",3.0001)]

; a["test1"] := "test11", a["d"] := d
; b["test3"] := "test33", b["e"] := e
; c["test5"] := "test55", c["f"] := f

; myObj := Map()
; myObj["a"] := a, myObj["b"] := b, myObj["c"] := c, myObj["test7"] := "test77", myObj["test8"] := "test88"

; g := ["blue","green","red"], myObj["h"] := g ; add linear array for testing

; q := Chr(34)
; textData2 := Jxon_dump(myObj,4) ; ===> convert array to JSON
; msgbox "JSON output text:`r`n===========================================`r`n(Should match second output.)`r`n`r`n" textData2

; newObj := Jxon_load(&textData2) ; ===> convert json back to array

; textData3 := Jxon_dump(newObj,4) ; ===> break down array into 2D layout again, should be identical
; msgbox "Second output text:`r`n===========================================`r`n(should be identical to first output)`r`n`r`n" textData3

; msgbox "textData2 = textData3:  " ((textData2=textData3) ? "true" : "false")

; ===========================================================================================
; End Example ; =============================================================================
; ===========================================================================================

; originally posted by user coco on AutoHotkey.com
; https://github.com/cocobelgica/AutoHotkey-JSON

Jxon_Load(&src, args*) {
	key := "", is_key := false
	stack := [ tree := [] ]
	next := '"{[01234567890-tfn'
	pos := 0
	
	while ( (ch := SubStr(src, ++pos, 1)) != "" ) {
		if InStr(" `t`n`r", ch)
			continue
		if !InStr(next, ch, true) {
			testArr := StrSplit(SubStr(src, 1, pos), "`n")
			
			ln := testArr.Length
			col := pos - InStr(src, "`n",, -(StrLen(src)-pos+1))

			msg := Format("{}: line {} col {} (char {})"
			,   (next == "")      ? ["Extra data", ch := SubStr(src, pos)][1]
			  : (next == "'")     ? "Unterminated string starting at"
			  : (next == "\")     ? "Invalid \escape"
			  : (next == ":")     ? "Expecting ':' delimiter"
			  : (next == '"')     ? "Expecting object key enclosed in double quotes"
			  : (next == '"}')    ? "Expecting object key enclosed in double quotes or object closing '}'"
			  : (next == ",}")    ? "Expecting ',' delimiter or object closing '}'"
			  : (next == ",]")    ? "Expecting ',' delimiter or array closing ']'"
			  : [ "Expecting JSON value(string, number, [true, false, null], object or array)"
			    , ch := SubStr(src, pos, (SubStr(src, pos)~="[\]\},\s]|$")-1) ][1]
			, ln, col, pos)

			throw Error(msg, -1, ch)
		}
		
		obj := stack[1]
        is_array := (obj is Array)
		
		if i := InStr("{[", ch) { ; start new object / map?
			val := (i = 1) ? Map() : Array()	; ahk v2
			
			is_array ? obj.Push(val) : obj[key] := val
			stack.InsertAt(1,val)
			
			next := '"' ((is_key := (ch == "{")) ? "}" : "{[]0123456789-tfn")
		} else if InStr("}]", ch) {
			stack.RemoveAt(1)
            next := (stack[1]==tree) ? "" : (stack[1] is Array) ? ",]" : ",}"
		} else if InStr(",:", ch) {
			is_key := (!is_array && ch == ",")
			next := is_key ? '"' : '"{[0123456789-tfn'
		} else { ; string | number | true | false | null
			if (ch == '"') { ; string
				i := pos
				while i := InStr(src, '"',, i+1) {
					val := StrReplace(SubStr(src, pos+1, i-pos-1), "\\", "\u005C")
					if (SubStr(val, -1) != "\")
						break
				}
				if !i ? (pos--, next := "'") : 0
					continue

				pos := i ; update pos

				val := StrReplace(val, "\/", "/")
				val := StrReplace(val, '\"', '"')
				, val := StrReplace(val, "\b", "`b")
				, val := StrReplace(val, "\f", "`f")
				, val := StrReplace(val, "\n", "`n")
				, val := StrReplace(val, "\r", "`r")
				, val := StrReplace(val, "\t", "`t")

				i := 0
				while i := InStr(val, "\",, i+1) {
					if (SubStr(val, i+1, 1) != "u") ? (pos -= StrLen(SubStr(val, i)), next := "\") : 0
						continue 2

					xxxx := Abs("0x" . SubStr(val, i+2, 4)) ; \uXXXX - JSON unicode escape sequence
					if (xxxx < 0x100)
						val := SubStr(val, 1, i-1) . Chr(xxxx) . SubStr(val, i+6)
				}
				
				if is_key {
					key := val, next := ":"
					continue
				}
			} else { ; number | true | false | null
				val := SubStr(src, pos, i := RegExMatch(src, "[\]\},\s]|$",, pos)-pos)
				
                if IsInteger(val)
                    val += 0
                else if IsFloat(val)
                    val += 0
                else if (val == "true" || val == "false")
                    val := (val == "true")
                else if (val == "null")
                    val := ""
                else if is_key {
                    pos--, next := "#"
                    continue
                }
				
				pos += i-1
			}
			
			is_array ? obj.Push(val) : obj[key] := val
			next := obj == tree ? "" : is_array ? ",]" : ",}"
		}
	}
	
	return tree[1]
}

Jxon_Dump(obj, indent:="", lvl:=1) {
	if IsObject(obj) {
        If !(obj is Array || obj is Map || obj is String || obj is Number)
			throw Error("Object type not supported.", -1, Format("<Object at 0x{:p}>", ObjPtr(obj)))
		
		if IsInteger(indent)
		{
			if (indent < 0)
				throw Error("Indent parameter must be a postive integer.", -1, indent)
			spaces := indent, indent := ""
			
			Loop spaces ; ===> changed
				indent .= " "
		}
		indt := ""
		
		Loop indent ? lvl : 0
			indt .= indent
        
        is_array := (obj is Array)
        
		lvl += 1, out := "" ; Make #Warn happy
		for k, v in obj {
			if IsObject(k) || (k == "")
				throw Error("Invalid object key.", -1, k ? Format("<Object at 0x{:p}>", ObjPtr(obj)) : "<blank>")
			
			if !is_array ;// key ; ObjGetCapacity([k], 1)
				out .= (ObjGetCapacity([k]) ? Jxon_Dump(k) : escape_str(k)) (indent ? ": " : ":") ; token + padding
			
			out .= Jxon_Dump(v, indent, lvl) ; value
				.  ( indent ? ",`n" . indt : "," ) ; token + indent
		}

		if (out != "") {
			out := Trim(out, ",`n" . indent)
			if (indent != "")
				out := "`n" . indt . out . "`n" . SubStr(indt, StrLen(indent)+1)
		}
		
		return is_array ? "[" . out . "]" : "{" . out . "}"
	
    } Else If (obj is Number)
        return obj
    
    Else { ; String

		if(obj == "true") 
			return "true"

		if(obj == "false")
			return "false"
		
        return escape_str(obj)
	}
	
    escape_str(obj) {
        obj := StrReplace(obj,"\","\\")
        obj := StrReplace(obj,"`t","\t")
        obj := StrReplace(obj,"`r","\r")
        obj := StrReplace(obj,"`n","\n")
        obj := StrReplace(obj,"`b","\b")
        obj := StrReplace(obj,"`f","\f")
        obj := StrReplace(obj,"/","\/")
        obj := StrReplace(obj,'"','\"')
        
        return '"' obj '"'
    }
}