pivot-editor/index.html
2021-05-11 06:26:18 -04:00

315 lines
9.1 KiB
HTML

<div id="app"></div>
<script>
var N =
{
ID:{
Walk:0,
Instance:0
},
Create(inMeta)
{
return {
ID:{
Walk:0,
Instance:N.ID.Instance++
},
Meta:inMeta||{},
Link:{}
};
},
Step(inNode, inType, inForward)
{
let connectionGroup = inNode.Link[inType];
if(!connectionGroup)
{
inNode.Link[inType] = connectionGroup = {Get:[], Set:[]};
}
return (inForward === undefined || inForward === true) ? connectionGroup.Set : connectionGroup.Get
},
Connect(inNodeMajor, inNodeMinor, inKey)
{
N.Step(inNodeMajor, inKey, true ).push(inNodeMinor);
N.Step(inNodeMinor, inKey, false).push(inNodeMajor);
},
Disconnect(inNodeMajor, inNodeMinor, inKey)
{
let remove = (inArray, inMatch) => inArray.findIndex( (inMember, inIndex, inArray) => (inMember === inMatch) ? inArray.splice(inIndex, 1) : false );
if(inNodeMinor === null)
{
inNodeMajor.Link[inKey].Set.forEach( inLoopNode =>
{
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);
}
});
// 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];
}
return;
}
if(inNodeMajor === null)
{
inNodeMinor.Link[inKey].Get.forEach( inLoopNode =>
{
if(inLoopNode.Link[inKey].Set.length == 1)
{
delete inLoopNode.Link[inKey];
}
else
{
remove( inLoopNode.Link[inKey].Set, inNodeMinor);
}
});
// 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];
}
return;
}
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);
}
},
Walk(inIterator, inNode, inKey, inForward)
{
let array = N.Step(inNode, inKey, inForward);
for(let i=0; i<array.length; i++)
{
let next = array[i];
if(next.ID.Walk !== N.ID.Walk)
{
next.ID.Walk = N.ID.Walk;
let results = inIterator(next);
if(results !== false)
{
N.Walk(inIterator, next, inKey, inForward);
}
}
}
}
};
`
A C
\ / \
\ / \
B D
`
let a = N.Create({name:"A"});
let b = N.Create({name:"B"});
let c = N.Create({name:"C"});
let d = N.Create({name:"D"});
N.Connect(a, b, "parent");
N.Connect(c, b, "parent");
N.Connect(c, d, "parent");
N.Disconnect(a, null, "parent");
console.log(a.Link);
console.log(b.Link);
console.log(c.Link);
console.log(d.Link);
</script>
<script>
var Pivot =
{
Leaves:{},
Root:{},
Init(inRows)
{
Pivot.Leaves = inRows.map(r => N.Create({Row:r}));
Pivot.Init = ()=>{};
},
Pivot(inParent, inColumnIndicies, inSumIndicies, inDepth)
{
//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
let value = row[inColumnIndicies[depth]]; // get the pivot column
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
match = uniques[value] = {
Label:value,
Row:inSumIndicies.map((inColumnIndex, inIndex, inArray) => row[inColumnIndex]), // create a Meta.Row also on the new child nodes to store summed totals
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
inSumIndicies.forEach((inColumnIndex, inIndex, inArray) => match.Row[inIndex] += row[inColumnIndex]);
}
// move the leaves into the child
match.Leaves.push(inLeaf);
});
delete inParent.Meta.Leaves;
var iterator;
if(depth >= inColumnIndicies.length-1)
{
iterator = inChild =>
{
inChild.Meta.Leaves.forEach( inLeaf => N.Connect(inChild, inLeaf, "Hierarchy") );
delete inChild.Meta.Leaves;
}
}
else
{
iterator = child => Pivot.Pivot(child, inColumnIndicies, inSumIndicies, depth+1);
}
N.Step(inParent, "Hierarchy").forEach(iterator);
return inParent;
},
Create(inColumnIndicies, inSumIndicies)
{
return Pivot.Pivot(N.Create({Leaves:Pivot.Leaves}), inColumnIndicies, inSumIndicies);
},
Modify(inNode)
{
N.ID.Walk++;
let leaves = [];
let gatherUp = n => N.Connect(inNode, n, "ModifyUp");
let gatherDown = n =>
{
N.Connect(inNode, n, "ModifyDown");
N.Step(n, "Hierarchy").length == 0 ? leaves.push(n) : null;
};
let gatherOut = n => N.Connect(inNode, n, "ModifyOut");
N.Walk(gatherUp, inNode, "Hierarchy", false);
N.Connect(inNode, inNode, "ModifyDown");
N.Walk(gatherDown, inNode, "Hierarchy");
leaves.forEach(leaf=>N.Walk(gatherOut, leaf, "Hierarchy", false));
},
Unmodify(inNode)
{
N.Disconnect(inNode, null, "ModifyUp");
N.Disconnect(inNode, null, "ModifyDown");
N.Disconnect(inNode, null, "ModifyOut");
}
};
</script>
<script type="module">
import {h, render, createContext} from 'https://cdn.skypack.dev/preact';
import {useReducer} from 'https://cdn.skypack.dev/preact/hooks';
import { css, cx } from 'https://cdn.skypack.dev/@emotion/css';
Pivot.Init([
["#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],
]);
let pivotRoot1 = Pivot.Create([1, 2], [3]);
let pivotRoot2 = Pivot.Create([2, 1], [3]);
let pivots = [pivotRoot1, pivotRoot2];
let Store = createContext(null);
let StoreState =
{
count:7
};
let StoreReducer = (inState, inAction) =>
{
}
let ElNode = ({node}) =>
{
var nodeChildren = N.Step(node, "Hierarchy");
var children = [];
var table = [];
if(node.Meta.Row)
{
table = node.Meta.Row.map( cell => h("span", {style:{padding:"10px"}}, cell));
}
children = [
h("strong", null, node.Meta.Label||"a node"),
...table,
h(Store.Consumer, null, value=>
{
return value.get.count;
})
];
if(nodeChildren.length)
{
children = [
...children,
...nodeChildren.map( inChild => h(ElNode, {node:inChild}))
];
}
return h("div", {style:{padding:"10px"}}, children);
}
let ElPivot = ({pivot}) =>
{
return h("div", {style:{display:"inline-block"}}, [
h(ElNode, {node:pivot})
]);
}
let ElRoot = ({pivots}) =>
{
let [get, set] = useReducer(StoreReducer, StoreState);
return h(Store.Provider, {value:{get, set}}, [
h("div", null, [
h("h3", null, "tree view"),
...pivots.map(pivot=>h(ElPivot, {pivot}))
])
]);
};
render(h(ElRoot, {pivots}, null), document.querySelector("#app"));
</script>