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{ FunctionRef } = require './reusable'
{ DateTime, Date } = require '../datatypes/datetime'
{ Concept } = require '../datatypes/clinical'
{ parseQuantity } = require './quantity'
{ isValidDecimal, isValidInteger, limitDecimalPrecision } = require('../util/math')
{ normalizeMillisecondsField } = require '../util/util'
{ Ratio } = require './ratio'
# TODO: Casting and Conversion needs unit tests!
module.exports.As = class As extends Expression
constructor: (json) ->
super
@asType = json.asType
@asTypeSpecifier = json.asTypeSpecifier
@strict = json.strict ? false
exec: (ctx) ->
# TODO: Currently just returns the arg (which works for null, but probably not others)
@execArgs(ctx)
module.exports.ToBoolean = class ToBoolean extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined'
strArg = arg.toString().toLowerCase()
if strArg in ["true", "t", "yes", "y", "1"]
true
else if strArg in ["false", "f", "no", "n", "0"]
false
else
null
else
null
module.exports.ToConcept = class ToConcept extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined' then new Concept([arg], arg.display) else null
module.exports.ToDate = class ToDate extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if (not arg?)
return null
else if arg.isDateTime
return arg.getDate()
else
return Date.parse(arg.toString())
module.exports.ToDateTime = class ToDateTime extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if (not arg?)
return null
else if arg.isDate
return arg.getDateTime()
else
return DateTime.parse(arg.toString())
module.exports.ToDecimal = class ToDecimal extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined'
decimal = parseFloat(arg.toString())
decimal = limitDecimalPrecision(decimal)
return decimal if isValidDecimal(decimal)
return null
module.exports.ToInteger = class ToInteger extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined'
integer = parseInt(arg.toString())
return integer if isValidInteger(integer)
return null
module.exports.ToQuantity = class ToQuantity extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined'
quantity = parseQuantity(arg.toString())
return quantity
else
return null
module.exports.ToRatio = class ToRatio extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg?
# Argument will be of form '<quantity>:<quantity>'
try
# String will be split into an array. Numerator will be at index 1, Denominator will be at index 4
splitRatioString = arg.toString().match(/^(\d+(\.\d+)?\s*('.+')?)\s*:\s*(\d+(\.\d+)?\s*('.+')?)$/)
return null if !splitRatioString?
numerator = parseQuantity(splitRatioString[1])
denominator = parseQuantity(splitRatioString[4])
catch
# If the input string is not formatted correctly, or cannot be
# interpreted as a valid Quantity value, the result is null.
return null
# The value element of a Quantity must be present.
return null unless numerator? and denominator?
return new Ratio({ numerator: numerator, denominator: denominator })
else
return null
module.exports.ToString = class ToString extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined' then arg.toString() else null
module.exports.ToTime = class ToTime extends Expression
constructor: (json) ->
super
exec: (ctx) ->
arg = @execArgs(ctx)
if arg? and typeof arg != 'undefined'
timeString = arg.toString()
# Return null if string doesn't represent a valid ISO-8601 Time
# Thh:mm:ss.fff(+|-)hh:mm or Thh:mm:ss.fffZ
matches = /T((\d{2})(\:(\d{2})(\:(\d{2})(\.(\d+))?)?)?)?(Z|(([+-])(\d{2})(\:?(\d{2}))?))?/.exec timeString
return null unless matches?
hours = matches[2]
minutes = matches[4]
seconds = matches[6]
# Validate h/m/s if they exist, but allow null
if hours?
return null unless hours >= 0 and hours <= 23
hours = parseInt(hours, 10)
if minutes?
return null unless minutes >= 0 and minutes <= 59
minutes = parseInt(minutes, 10)
if seconds?
return null unless seconds >= 0 and seconds <= 59
seconds = parseInt(seconds, 10)
milliseconds = matches[8]
if milliseconds?
milliseconds = parseInt(normalizeMillisecondsField(milliseconds))
if matches[11]?
tz = parseInt(matches[12],10) + (if matches[14]? then parseInt(matches[14],10) / 60 else 0)
timezoneOffset = if matches[11] is '+' then tz else tz * -1
else if matches[9] == 'Z'
timezoneOffset = 0
# Time is implemented as Datetime with year 0, month 1, day 1
return new DateTime(0, 1, 1, hours, minutes, seconds, milliseconds, timezoneOffset)
else
return null
module.exports.Convert = class Convert extends Expression
constructor: (json) ->
super
@operand = json.operand
@toType = json.toType
exec: (ctx) ->
switch @toType
when "{urn:hl7-org:elm-types:r1}Boolean"
new ToBoolean({"type": "ToBoolean", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Concept"
new ToConcept({"type": "ToConcept", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Decimal"
new ToDecimal({"type": "ToDecimal", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Integer"
new ToInteger({"type": "ToInteger", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}String"
new ToString({"type": "ToString", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Quantity"
new ToQuantity({"type": "ToQuantity", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}DateTime"
new ToDateTime({"type": "ToDateTime", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Date"
new ToDate({"type": "ToDate", "operand": @operand}).execute(ctx)
when "{urn:hl7-org:elm-types:r1}Time"
new ToTime({"type": "ToTime", "operand": @operand}).execute(ctx)
else
@execArgs(ctx)
module.exports.ConvertsToBoolean = class ConvertsToBoolean extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToBoolean, @operand, ctx)
module.exports.ConvertsToDate = class ConvertsToDate extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToDate, @operand, ctx)
module.exports.ConvertsToDateTime = class ConvertsToDateTime extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToDateTime, @operand, ctx)
module.exports.ConvertsToDecimal = class ConvertsToDecimal extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToDecimal, @operand, ctx)
module.exports.ConvertsToInteger = class ConvertsToInteger extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToInteger, @operand, ctx)
module.exports.ConvertsToQuantity = class ConvertsToQuantity extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToQuantity, @operand, ctx)
module.exports.ConvertsToRatio = class ConvertsToRatio extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToRatio, @operand, ctx)
module.exports.ConvertsToString = class ConvertsToString extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToString, @operand, ctx)
module.exports.ConvertsToTime = class ConvertsToTime extends Expression
constructor: (json) ->
super
@operand = json.operand
exec: (ctx) ->
operatorValue = @execArgs(ctx)
if operatorValue is null
return null
else
canConvertToType(ToTime, @operand, ctx)
canConvertToType = (toFunction, operand, ctx) ->
try
value = new toFunction({"type": toFunction.name, "operand": operand}).execute(ctx)
if value? then true else false
catch
false
module.exports.Is = class Is extends UnimplementedExpression
module.exports.IntervalTypeSpecifier = class IntervalTypeSpecifier extends UnimplementedExpression
module.exports.ListTypeSpecifier = class ListTypeSpecifier extends UnimplementedExpression
module.exports.NamedTypeSpecifier = class NamedTypeSpecifier extends UnimplementedExpression
module.exports.TupleTypeSpecifier = class TupleTypeSpecifier extends UnimplementedExpression
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