pivot-editor/index.html

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<div id="app"></div>
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<script>
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var N =
{
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ID:{
Walk:0,
Instance:0
},
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Create(inMeta)
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{
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return {
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ID:{
Walk:0,
Instance:N.ID.Instance++
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},
Meta:inMeta||{},
Link:{}
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};
},
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Connect(inNodeMajor, inNodeMinor, inKey, inUnique)
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{
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if(inUnique) // bail if the nodes are already connected
{
let check = N.Step(inNodeMajor, inKey, true);
if(check)
{
if(check.indexOf(inNodeMinor) < 0)
{
return;
}
}
}
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N.Step(inNodeMajor, inKey, true, true).push(inNodeMinor);
N.Step(inNodeMinor, inKey, false, true).push(inNodeMajor);
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},
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Disconnect(inNodeMajor, inNodeMinor, inKey)
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{
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let remove = (inArray, inMatch) => inArray.findIndex( (inMember, inIndex, inArray) => (inMember === inMatch) ? inArray.splice(inIndex, 1) : false );
if(inNodeMinor === null)
{
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let check = N.Step(inNodeMajor, inKey);
if(!check){ return; }
check.forEach( inLoopNode =>
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{
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if(inLoopNode.Link[inKey].Get.length == 1)
{
// we're about to delete the last get reference on a minor node, just purge the key entirely
delete inLoopNode.Link[inKey];
}
else
{
remove( inLoopNode.Link[inKey].Get, inNodeMajor);
}
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});
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// we just wiped out all set, if get is empty we can purge the key from major
if(inNodeMajor.Link[inKey].Get.length == 0)
{
delete inNodeMajor.Link[inKey];
}
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return;
}
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if(inNodeMajor === null)
{
inNodeMinor.Link[inKey].Get.forEach( inLoopNode =>
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{
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if(inLoopNode.Link[inKey].Set.length == 1)
{
delete inLoopNode.Link[inKey];
}
else
{
remove( inLoopNode.Link[inKey].Set, inNodeMinor);
}
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});
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// we just wiped out all get, if set is empty we can purge the key from minor
if(inNodeMinor.Link[inKey].Set.length == 0)
{
delete inNodeMinor.Link[inKey];
}
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return;
}
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if(inNodeMajor.Link[inKey].Set.length == 1)
{
delete inNodeMajor.Link[inKey];
}
else
{
remove(inNodeMajor.Link[inKey].Set, inNodeMinor);
}
if(inNodeMinor.Link[inKey].Get.length == 1)
{
delete inNodeMinor.Link[inKey];
}
else
{
remove(inNodeMinor.Link[inKey].Get, inNodeMajor);
}
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},
Step(inNode, inKey, inForward, inForceCreate)
{
let connectionGroup = inNode.Link[inKey];
if(!connectionGroup)
{
if(inForceCreate)
{
inNode.Link[inKey] = connectionGroup = {Get:[], Set:[]};
}
else
{
return false;
}
}
return (inForward === undefined || inForward === true) ? connectionGroup.Set : connectionGroup.Get;
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},
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Walk(inIterator, inNode, inKey, inForward, inTerminal)
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{
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let array = N.Step(inNode, inKey, inForward);
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if(!array.length && inTerminal)
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{
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return inTerminal(inNode);
}
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for(let i=0; i<array.length; i++)
{
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let next = array[i];
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if(next.ID.Walk !== N.ID.Walk)
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{
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next.ID.Walk = N.ID.Walk;
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let results = inIterator(next);
if(results !== false)
{
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N.Walk(inIterator, next, inKey, inForward, inTerminal);
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}
}
}
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},
Path(inArray, inNode, inKey, inForward)
{
var current = inNode;
var direction = inForward||true;
for(let i=0; i<inArray.length; i++)
{
current = N.Step(current, inKey, direction)[inArray[i]];
}
return current;
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}
};
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</script>
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<script>
var Pivot =
{
Leaves:{},
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Root:N.Create({}),
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Init(inRows)
{
Pivot.Leaves = inRows.map(r => N.Create({Row:r}));
Pivot.Init = ()=>{};
},
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Pivot(inParent, inPivotIndicies, inSumIndicies, inDepth)
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{
//arguments:
// - a Node with leaf Nodes temporarily stored in its Meta.Leaves
// - where each leaf Node has a row of table data in it's Meta.Row
// - a list of columns to pivot on
// - a list of columns to sum
// - optional traversal depth, defaults to 0
let depth = inDepth||0;
let uniques = {};
inParent.Meta.Leaves.forEach((inLeaf)=>
{
let row = inLeaf.Meta.Row; // shorthand for the raw "CSV" row in the leaf Node's Meta
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let value = row[inPivotIndicies[depth]]; // get the pivot column
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let match = uniques[value]; // check in the uniques list if this pivot column exists
if(!match)
{
// if not, store a value under that key that will be the meta object for a new child
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let clone = row.map(r=>null);
inSumIndicies.forEach((inSumIndex, inIndex, inArray)=>
{
clone[inSumIndex] = row[inSumIndex]
});
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match = uniques[value] = {
Label:value,
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Row:clone,
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Leaves:[]
};
// grow a child off of the parent using the meta object
N.Connect(inParent, N.Create(match), "Hierarchy");
}
else
{
// if a match does exist, sum the appropriate columns
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inSumIndicies.forEach((inSumIndex) => match.Row[inSumIndex] += row[inSumIndex]);
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}
// move the leaves into the child
match.Leaves.push(inLeaf);
});
delete inParent.Meta.Leaves;
var iterator;
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if(depth >= inPivotIndicies.length-1)
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{
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iterator = inLastBranch =>
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{
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inLastBranch.Meta.Leaves.forEach( inLeaf =>
{
// collect modifiers effecting leaves
let modifiers = [];
let check = N.Step(inLeaf, "ModifyAt", false);
if(check)
{
modifiers = modifiers.concat(check);
}
check = N.Step(inLeaf, "ModifyDown", false);
if(check)
{
modifiers = modifiers.concat(check);
}
if(modifiers.length)
{
// apply them to the branch
inLastBranch.ID.Walk = N.ID.Walk;
modifiers.forEach( inModifier => N.Connect(inModifier, inLastBranch, "ModifyUp") )
// also walk them up, but with a unique check connection
N.Walk( inNode=>
{
modifiers.forEach( inModifier => N.Connect(inModifier, inNode, "ModifyUp", true) )
}
, inLastBranch, "Hierarchy", false);
}
// lastly connect the leaf to the branch
N.Connect(inLastBranch, inLeaf, "Hierarchy");
});
delete inLastBranch.Meta.Leaves;
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}
}
else
{
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iterator = child => Pivot.Pivot(child, inPivotIndicies, inSumIndicies, depth+1);
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}
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N.Step(inParent, "Hierarchy").forEach(iterator);
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return inParent;
},
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Create(inPivotIndicies, inSumIndicies)
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{
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N.ID.Walk++;
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let pivotRoot = N.Create({Leaves:Pivot.Leaves});
N.Connect(Pivot.Root, pivotRoot, "Pivot");
return Pivot.Pivot(pivotRoot, inPivotIndicies, inSumIndicies);
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},
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Delete(inRoot)
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{
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N.ID.Walk++;
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let scan = n =>
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{
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};
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N.Walk(scan, inRoot, "Hierarchy")
},
Modify(inNode)
{
let modified = N.Create({});
N.ID.Walk++;
if(N.Step(inNode, "Hierarchy").length)
{
N.Walk(()=>{}, inNode, "Hierarchy", false, (inRoot)=>
{
N.Connect(inRoot, modified, "Modifier");
});
}
else
{
N.Connect(Pivot.Root, modified, "Modifier");
}
let leaves = [];
let gatherUp = n => N.Connect(modified, n, "ModifyUp");
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let gatherDown = n =>
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{
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N.Connect(modified, n, "ModifyDown");
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N.Step(n, "Hierarchy").length == 0 ? leaves.push(n) : null;
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};
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let gatherOut = n => N.Connect(modified, n, "ModifyOut");
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N.ID.Walk++;
inNode.ID.Walk = N.ID.Walk;
N.Connect(modified, inNode, "ModifyAt");
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N.Walk(gatherUp, inNode, "Hierarchy", false);
N.Walk(gatherDown, inNode, "Hierarchy");
leaves.forEach(leaf=>N.Walk(gatherOut, leaf, "Hierarchy", false));
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return modified;
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},
Unmodify(inNode)
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{
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let modifier = N.Step(inNode, "ModifyAt", false)[0];
N.Disconnect(modifier, null, "ModifyUp");
N.Disconnect(modifier, null, "ModifyDown");
N.Disconnect(modifier, null, "ModifyOut");
N.Disconnect(modifier, null, "ModifyAt");
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N.Disconnect(null, modifier, "Modifier");
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}
};
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</script>
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<script type="module">
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import { h, render, createContext, Fragment } from 'https://cdn.skypack.dev/preact';
import { useReducer } from 'https://cdn.skypack.dev/preact/hooks';
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import { css, cx } from 'https://cdn.skypack.dev/@emotion/css';
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Pivot.Init([
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["#1", "a", "long", 1],
["#2", "b", "long", 2],
["#3", "b", "short", 2],
["#4", "a", "long", 3],
["#5", "b", "short", 1],
["#6", "a", "short", 0],
["#7", "b", "short", 7],
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]);
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Pivot.Create([1, 2], [3]);
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let AddNewPivot = () =>
{
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Pivot.Create([2], [3]);
Render();
};
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let ElNode = ({node, depth}) =>
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{
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let nodeBase = css`
position:relative;
padding:0;
margin:0;
border-top:1px solid lightgrey;
.Table
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{
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display:inline-block;
text-align:right;
}
.Cell
{
width:50px;
display:inline-block;
padding:10px;
}
`;
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let label = css`
display:inline-block;
width:200px;
&::before
{
content:" ";
display:inline-block;
width:${depth*15}px;
}
.Modify
{
float:right;
}
`;
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let icon = cx(
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{
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[css`
display:inline-block;
width:0px;
height:0px;
border:7px solid white;` ]: true,
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[css`border-bottom-color:lightblue;`]: N.Step(node, "ModifyUp" ),
[css`border-top-color:orange;` ]: N.Step(node, "ModifyDown"),
[css`border-left-color:grey;` ]: N.Step(node, "ModifyOut" ),
[css`border-right-color:red;` ]: N.Step(node, "ModifyAt" )
},
);
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let buttonModify = h("span", {
className:"Icon Modify Add",
onClick:e=>
{
Pivot.Modify(node);
Render();
}
}, "Modify");
let buttonUnmodify = h("span", {
className:"Icon Modify remove",
onClick:e=>
{
Pivot.Unmodify(node);
Render();
}
}, "Unmodify");
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return h("div", {className:"Node"}, [
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h("div", {className:cx(nodeBase, "Upper")}, [
h("div", {className:label}, [
h("span", {className:"Icon Expand"}, "+"),
h("span", {className:"Name"}, (node.Meta.Label || "a node")+" "+node.ID.Walk),
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h("span", {className: icon}),
N.Step(node, "ModifyAt") ? buttonUnmodify : buttonModify
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] ),
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h("div", {className:"Table"}, (node.Meta.Row || []).map( cell => h("div", {className:"Cell"}, cell)) )
]),
h("div", {className:"Nodes"}, N.Step(node, "Hierarchy").map(child=>h(ElNode, {node:child, depth:depth+1})) )
]);
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};
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let ElPivot = ({pivot}) =>
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{
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return h("div", {style:{display:"inline-block", width:"500px"}}, [
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h(ElModifiers, {node:pivot}),
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h(ElNode, {node:pivot, depth:0})
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]);
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};
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let ElModifiers = ({node}) =>
{
let modifiers = N.Step(node, "Modifier") || [];
return h("div", null, [
h("strong", null, "modifiers"),
...modifiers.map( m => h("span", {onClick:e=>
{
Pivot.Unmodify(N.Step(m, "ModifyAt")[0]);
Render();
}
}, "modifier"))
]);
};
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let ElRoot = props =>
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{
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return h("div", null, [
h("h3", null, "tree view"),
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h(ElModifiers, {node:Pivot.Root}),
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h("button", { onClick:e=>
{
AddNewPivot();
}
}, "add new pivot"),
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...N.Step(Pivot.Root, "Pivot").map(pivot=>h(ElPivot, {pivot}))
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])
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};
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let Render = () => render(h(ElRoot), document.querySelector("#app"));
Render();
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</script>