qwc2/utils/expr_grammar/test.js

QGIS Web Client

/* This is just a scratch file for testing the expression grammar */

import nearley from "nearley";
import grammar from "./grammar.js";
import MiscUtils from '../MiscUtils.js';
global.qwc2ExpressionParserContext = {
  feature: {
    "type": "Feature",
    "properties": {
      "listnr": 1,
      "grpcode": 2,
      "numcode": 3,
      "label": "My fancy feature",
      "BerechneteGruenflaeche": 10,
      "EffektiveGruenflaeche": 8,
      // "BerechneteBebauungsflaeche" - "EffektiveBebauungsflaeche" - "Abtretung" + "Zuteilung"
      "BerechneteBebauungsflaeche": 10,
      "EffektiveBebauungsflaeche": 9,
      "Abtretung": 8.1,
      "Zuteilung": 7.3
      // 10 - 9 - 8 + 7 = 0
    }
  },
  getFeature: function getFeature(layerName, attr, value) {
    return {
      "type": "Feature",
      "id": 210000,
      "geometry": null,
      "properties": {
        "id": 2,
        "label": "ABLAGERUNGEN",
        "code": "DBC",
        "listnr": 21,
        "grpcode": 0,
        "numcode": 0,
        "q1": null,
        "q1suff": null,
        "q2": null,
        "q2suff": null,
        "qsr": null,
        "z1": null,
        "z2": null,
        "l1": 2,
        "l2": null,
        "lastlevel": null,
        "level": 1,
        "tooltip": "Ablagerungen an der Schachtsohle oder an Auftritten.",
        "id2": 210000
      },
      "__version__": 1711648978811
    };
  },
  representValue: function representValue(attr) {
    var _$2$3$4$value;
    console.log(attr);
    var value = global.qwc2ExpressionParserContext.feature.properties[attr];
    console.log(value);
    return (_$2$3$4$value = {
      1: 'One',
      2: 'Two',
      3: 'Three',
      4: 'Four'
    }[value]) !== null && _$2$3$4$value !== void 0 ? _$2$3$4$value : value;
  },
  formatDate: MiscUtils.formatDate,
  asFilter: false,
  username: "testuser",
  layer: "layername"
};

// Create a Parser object from our grammar.
var parser = new nearley.Parser(nearley.Grammar.fromCompiled(grammar));

// Parse something!
// parser.feed("attribute('txt') is not null and attribute('txt') <> ''")
// parser.feed("attribute(get_feature('foo', 'asd', 3), 'asd')");
// parser.feed("attribute('listnr') is not null and attribute(get_feature('chnnodedam_map','id2',attribute('listnr')*10000),'lastlevel')is null")
// parser.feed("attribute(get_feature('chnnodedam_map','id2',(coalesce(attribute('listnr')*10000,0) + coalesce(attribute('grpcode')*100,0) + coalesce(attribute('numcode'),0))),'l1')")
// parser.feed('"listnrx"')
// parser.feed('"listnr"*10000 + "grpcode"*100 + "numcode"')
// parser.feed('"listnr" = 1 AND ("grpcode" = 2 OR "numcode" = 3)')
// parser.feed('"listnr" =current_value(\'listnr\') and  "grpcode" >0 and "numcode" = 0')
// parser.feed(' "listnr" =current_value(\'listnr\') and "grpcode" =  current_value(\'grpcode\') and "numcode" >0 and "foo" = ((1<2) = true)')
// parser.feed("if(3>2, 3, 4)")
// parser.feed("nullif('a', 'b')")
// parser.feed("@user_account_name")
// parser.feed("'Hello' || ' ' || 'World'");
// parser.feed('represent_value("numcode")');
// parser.feed('"BerechneteGruenflaeche" - "EffektiveGruenflaeche"');
// parser.feed('"BerechneteBebauungsflaeche" - "EffektiveBebauungsflaeche" - "Abtretung" + "Zuteilung"');
// parser.feed('randf(0.5,0.6)');
// parser.feed('round(\r "Abtretung" \r+ "Zuteilung")')
// parser.feed("format_date('2012-05-15','d MMMM yyyy','fr')")

console.log(JSON.stringify(parser.results));