minpkg/lib/min_xml.nim
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import
std/xmlparser,
std/xmltree,
std/parsexml,
std/strtabs,
std/critbits,
nimquery
import
../core/parser,
../core/value,
../core/interpreter,
../core/utils
let xmltypes = "dict:xml-text|dict:xml-element|dict:xml-cdata|dict:xml-comment|dict:xml-entity"
proc newXDict(i: In, xml: XmlNode): MinValue =
result = newDict(i.scope)
case xml.kind:
of xnText:
result.objType = "xml-text"
i.dset(result, "text", xml.text.newVal)
of xnVerbatimText:
result.objType = "xml-text"
i.dset(result, "text", xml.text.newVal)
of xnElement:
result.objType = "xml-element"
i.dset(result, "tag", xml.tag.newVal)
var children = newSeq[MinValue](0)
var attributes = newDict(i.scope)
for child in xml.items:
children.add i.newXDict(child)
i.dset(result, "children", children.newVal)
if not xml.attrs.isNil:
for attr in xml.attrs.pairs:
i.dset(attributes, attr.key, attr.value.newVal)
i.dset(result, "attributes", attributes)
of xnCData:
result.objType = "xml-cdata"
i.dset(result, "text", xml.text.newVal)
of xnEntity:
result.objType = "xml-entity"
i.dset(result, "text", xml.text.newVal)
of xnComment:
result.objType = "xml-comment"
i.dset(result, "text", xml.text.newVal)
proc newXml(i: In, xdict: MinValue): XmlNode =
case xdict.objType:
of "xml-text":
result = newText(i.dget(xdict, "text").getString)
of "xml-element":
let tag = i.dget(xdict, "tag").getString
let attributes = i.dget(xdict, "attributes")
let children = i.dget(xdict, "children")
result = newElement(tag)
var attrs = newSeq[tuple[key, val: string]](0)
for attr in i.keys(attributes).qVal:
let key = attr.getString
let val = i.dget(attributes, attr).getString
attrs.add {key: key, val: val}
result.attrs = attrs.toXmlAttributes
for child in children.qVal:
result.add i.newXml(child)
of "xml-cdata":
result = newCdata(i.dget(xdict, "text").getString)
of "xml-entity":
result = newEntity(i.dget(xdict, "text").getString)
of "xml-comment":
result = newComment(i.dget(xdict, "text").getString)
proc xml_module*(i: In) =
let def = i.define()
i.scope.symbols["typealias:xml-node"] = MinOperator(kind: minValOp, val: xmltypes.newVal, sealed: false, quotation: false)
def.symbol("from-xml") do (i: In):
let vals = i.expect("str")
let s = vals[0].getString()
try:
let xml = parseXml(s, {reportComments, allowUnquotedAttribs, allowEmptyAttribs})
i.push(i.newXDict(xml))
except CatchableError:
let msg = getCurrentExceptionMsg()
raiseInvalid(msg)
def.symbol("xcomment") do (i: In):
let vals = i.expect("'sym")
i.push i.newXDict(newComment(vals[0].getString))
def.symbol("xcdata") do (i: In):
let vals = i.expect("'sym")
i.push i.newXDict(newCData(vals[0].getString))
def.symbol("xtext") do (i: In):
let vals = i.expect("'sym")
i.push i.newXDict(newText(vals[0].getString))
def.symbol("xentity") do (i: In):
let vals = i.expect("'sym")
i.push i.newXDict(newEntity(vals[0].getString))
def.symbol("xelement") do (i: In):
let vals = i.expect("'sym")
i.push i.newXDict(newElement(vals[0].getString))
def.symbol("to-xml") do (i: In):
let vals = i.expect("xml-node")
let xdict = vals[0]
let xml = i.newXml(xdict)
i.push ($xml).newVal
def.symbol("xquery") do (i: In):
let vals = i.expect("dict:xml-element", "'sym")
let xdict = vals[0]
let query = vals[1].getString
let root = i.newXml(xdict)
i.push i.newXDict(root.querySelector(query))
def.symbol("xqueryall") do (i: In):
let vals = i.expect("dict:xml-element", "'sym")
let xdict = vals[0]
let query = vals[1].getString
let root = i.newXml(xdict)
let xresults = root.querySelectorAll(query)
var results = newSeq[MinValue](0)
for e in xresults:
results.add i.newXDict(e)
i.push results.newVal
def.finalize("xml")
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