From 6cdcce30e8bf6fac92341a0208f37c9a35ef6066 Mon Sep 17 00:00:00 2001
From: Felix Henninger <mailbox@felixhenninger.com>
Date: Fri, 7 Aug 2020 18:07:07 +0200
Subject: [PATCH] Port loop sample widget

---
 .../Content/Loop/SampleWidget/index.js        | 101 ++++++++++++++++++
 .../components/Content/Loop/index.js          |  17 ++-
 2 files changed, 115 insertions(+), 3 deletions(-)
 create mode 100644 packages/builder/src/components/ComponentOptions/components/Content/Loop/SampleWidget/index.js

diff --git a/packages/builder/src/components/ComponentOptions/components/Content/Loop/SampleWidget/index.js b/packages/builder/src/components/ComponentOptions/components/Content/Loop/SampleWidget/index.js
new file mode 100644
index 000000000..a700c4ad2
--- /dev/null
+++ b/packages/builder/src/components/ComponentOptions/components/Content/Loop/SampleWidget/index.js
@@ -0,0 +1,101 @@
+import React from 'react'
+
+import { Field, useFormikContext } from 'formik'
+import { FormGroup, Label, Col, InputGroup } from 'reactstrap'
+
+import Hint from '../../../../../Hint'
+import { Input } from '../../../../../Form'
+import { integerOrPlaceholder } from '../../../Behavior/components/Timeline/util'
+
+const switchLabels = ({
+  templateParameters={ rows: [] },
+  sample={ n: undefined }
+}, labels) => {
+  const samples = parseInt(sample.n)
+  const parameters = templateParameters.rows.length
+
+  if (samples < parameters) {
+    return labels[0]
+  } else if (isNaN(samples) || samples === parameters) {
+    return labels[1]
+  } else {
+    return labels[2]
+  }
+}
+
+export default () => {
+  const { values } = useFormikContext()
+
+  return <FormGroup row>
+    <Label xs={ 2 } for="sampleN">
+      Sample
+      <Hint
+        title="Sampling"
+        className="float-right"
+        placement="left"
+      >
+        <p className="font-weight-bold">
+          Control how many, and which of the above parameter sets are used.
+        </p>
+        <p className="text-muted">
+          The <strong>sample size</strong> defines the number of loop iterations. The <strong>mode</strong> determines how the iterations are drawn from the entries above.
+        </p>
+        <dl className="text-muted">
+          <dt>Sequential</dt>
+          <dd>Proceed in order, starting from the top. If more samples are requested than entries are available, start over.</dd>
+
+          <dt>Random order</dt>
+          <dd>Present entries in shuffled order<br /> (only available without sampling).</dd>
+
+          <dt>Sample without replacement</dt>
+          <dd>Draw entries at random, starting over when all are exhausted. Shuffles the result for a completely random order.</dd>
+
+          <dt>Sample w/o replacement (in blocks)</dt>
+          <dd>As above, but without shuffling.<br /> If the number of samples exceeds the number of entries, this results in blocks of all entries in random order.</dd>
+
+          <dt>Sample with replacement</dt>
+          <dd>Draw entries without regard to which have been selected before.</dd>
+        </dl>
+      </Hint>
+    </Label>
+    <Col xs={10}>
+      <InputGroup>
+        <Field
+          name="sample.n"
+          component={ Input }
+          pattern={ integerOrPlaceholder }
+          placeholder={
+            (values.sample || {}).mode === 'draw-replace'
+              ? 'As many as rows above'
+              : 'Use all'
+          }
+          className="text-monospace"
+        />
+        <Field
+          name={ 'sample.mode' }
+          as="select"
+          className="form-control custom-select text-monospace"
+        >
+          <option value="sequential">
+            In sequence
+          </option>
+          <option value="draw-shuffle">
+            {
+              switchLabels(values, [
+                'Sampled without replacement',
+                'In random order',
+                'Sampled without replacement (then shuffled)'
+              ])
+            }
+          </option>
+          <option value="draw">
+            Sampled without replacement (in blocks)
+          </option>
+          <option value="draw-replace">
+            Sampled with replacement
+          </option>
+        </Field>
+      </InputGroup>
+    </Col>
+  </FormGroup>
+}
diff --git a/packages/builder/src/components/ComponentOptions/components/Content/Loop/index.js b/packages/builder/src/components/ComponentOptions/components/Content/Loop/index.js
index 42a350f99..04f7c0e53 100644
--- a/packages/builder/src/components/ComponentOptions/components/Content/Loop/index.js
+++ b/packages/builder/src/components/ComponentOptions/components/Content/Loop/index.js
@@ -1,13 +1,24 @@
 import React from 'react'
 
+import { CardBody } from 'reactstrap'
+
 import Card from '../../../../Card'
+import Form from '../../Form'
+
+import SampleWidget from './SampleWidget'
 
-export default () =>
-  <>
+export default ({ id, data }) =>
+  <Form
+    id={ id } data={ data }
+    keys={ [ 'sample' ] }
+  >
     <Card title="Loop" wrapContent={ false }>
+      <CardBody>
+        <SampleWidget />
+      </CardBody>
     </Card>
     <Card title="Further options"
       /* ... */
     >
     </Card>
-  </>
+  </Form>