c3_chart_internal_fn.convertDataToTargets = function()

in TestApplications/Web/js/lib/components/c3-0.4.2/c3.js [1924:2020]

• 73 lines of code
• 24 McCabe index (conditional complexity)

    c3_chart_internal_fn.convertDataToTargets = function (data, appendXs) {
        var $$ = this, config = $$.config,
            ids = $$.d3.keys(data[0]).filter($$.isNotX, $$),
            xs = $$.d3.keys(data[0]).filter($$.isX, $$),
            targets;

        // save x for update data by load when custom x and c3.x API
        ids.forEach(function (id) {
            var xKey = $$.getXKey(id);

            if ($$.isCustomX() || $$.isTimeSeries()) {
                // if included in input data
                if (xs.indexOf(xKey) >= 0) {
                    $$.data.xs[id] = (appendXs && $$.data.xs[id] ? $$.data.xs[id] : []).concat(
                        data.map(function (d) { return d[xKey]; })
                            .filter(isValue)
                            .map(function (rawX, i) { return $$.generateTargetX(rawX, id, i); })
                    );
                }
                // if not included in input data, find from preloaded data of other id's x
                else if (config.data_x) {
                    $$.data.xs[id] = $$.getOtherTargetXs();
                }
                // if not included in input data, find from preloaded data
                else if (notEmpty(config.data_xs)) {
                    $$.data.xs[id] = $$.getXValuesOfXKey(xKey, $$.data.targets);
                }
                // MEMO: if no x included, use same x of current will be used
            } else {
                $$.data.xs[id] = data.map(function (d, i) { return i; });
            }
        });


        // check x is defined
        ids.forEach(function (id) {
            if (!$$.data.xs[id]) {
                throw new Error('x is not defined for id = "' + id + '".');
            }
        });

        // convert to target
        targets = ids.map(function (id, index) {
            var convertedId = config.data_idConverter(id);
            return {
                id: convertedId,
                id_org: id,
                values: data.map(function (d, i) {
                    var xKey = $$.getXKey(id), rawX = d[xKey], x = $$.generateTargetX(rawX, id, i);
                    // use x as categories if custom x and categorized
                    if ($$.isCustomX() && $$.isCategorized() && index === 0 && rawX) {
                        if (i === 0) { config.axis_x_categories = []; }
                        config.axis_x_categories.push(rawX);
                    }
                    // mark as x = undefined if value is undefined and filter to remove after mapped
                    if (isUndefined(d[id]) || $$.data.xs[id].length <= i) {
                        x = undefined;
                    }
                    return {x: x, value: d[id] !== null && !isNaN(d[id]) ? +d[id] : null, id: convertedId};
                }).filter(function (v) { return isDefined(v.x); })
            };
        });

        // finish targets
        targets.forEach(function (t) {
            var i;
            // sort values by its x
            if (config.data_xSort) {
                t.values = t.values.sort(function (v1, v2) {
                    var x1 = v1.x || v1.x === 0 ? v1.x : Infinity,
                        x2 = v2.x || v2.x === 0 ? v2.x : Infinity;
                    return x1 - x2;
                });
            }
            // indexing each value
            i = 0;
            t.values.forEach(function (v) {
                v.index = i++;
            });
            // this needs to be sorted because its index and value.index is identical
            $$.data.xs[t.id].sort(function (v1, v2) {
                return v1 - v2;
            });
        });

        // set target types
        if (config.data_type) {
            $$.setTargetType($$.mapToIds(targets).filter(function (id) { return ! (id in config.data_types); }), config.data_type);
        }

        // cache as original id keyed
        targets.forEach(function (d) {
            $$.addCache(d.id_org, d);
        });

        return targets;
    };