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Improve data normalizer and add tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,178 @@ | ||
| /* | ||
| * Copyright (C) 2019 Sylvain Afchain | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
|
|
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| export class Result { | ||
| private _columns: Array<string> | ||
| private _rows: Array<Map<string, any>> | ||
|
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| private colIndexes: Map<string, number> | ||
|
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| constructor() { | ||
| this._columns = new Array<string>() | ||
| this._rows = new Array<Map<string, any>>() | ||
|
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| this.colIndexes = new Map<string, number>() | ||
| } | ||
|
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| addColumn(name: string) { | ||
| let index = this.colIndexes.get(name) | ||
| if (index === undefined) { | ||
| this.colIndexes.set(name, this.columns.length) | ||
|
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| this._columns.push(name) | ||
| } | ||
| } | ||
|
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| columnIndex(name: string): number | undefined { | ||
| return this.colIndexes.get(name) | ||
| } | ||
|
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| newRow(): Map<string, any> { | ||
| return new Map<string, any>() | ||
| } | ||
|
|
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| addRow(row: Map<string, any>) { | ||
| if (row.size) { | ||
| for (let key of row.keys()) { | ||
| this.addColumn(key) | ||
| } | ||
|
|
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| this._rows.push(row) | ||
| } | ||
| } | ||
|
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| get rows(): Array<Array<any>> { | ||
| var rows = new Array<Array<any>>() | ||
| for (let row of this._rows) { | ||
| let plain = new Array<any>() | ||
| for (let i = 0; i != this.colIndexes.size; i++) { | ||
| plain[i] = "" | ||
| } | ||
|
|
||
| row.forEach((value, key) => { | ||
| var index = this.columnIndex(key) | ||
| if (index === undefined) { | ||
| return | ||
| } | ||
| plain[index] = value | ||
| }) | ||
|
|
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| rows.push(plain) | ||
| } | ||
|
|
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| return rows | ||
| } | ||
|
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| get columns(): Array<string> { | ||
| return this._columns | ||
| } | ||
| } | ||
|
|
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| export class DataNormalizer { | ||
|
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| normalizer: ((any) => any) | null | ||
|
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| constructor(normalizer?: (any) => any) { | ||
| this.normalizer = normalizer || null | ||
| } | ||
|
|
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| private normalizeMap(data: any, result: Result) { | ||
| for (let attr in data) { | ||
| let row = result.newRow() | ||
|
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| let value = data[attr] | ||
| switch (typeof value) { | ||
| case "object": | ||
| break | ||
| case "boolean": | ||
| row.set("Key", attr) | ||
| row.set("Value", value ? "true" : "false") | ||
| break | ||
| default: | ||
| row.set("Key", attr) | ||
| row.set("Value", value) | ||
| break | ||
| } | ||
|
|
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| result.addRow(row) | ||
| } | ||
|
|
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| return result | ||
| } | ||
|
|
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| private normalizeScalarArray(data: any, result: Result) { | ||
| for (let value of data) { | ||
| let row = result.newRow() | ||
|
|
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| if (typeof value === "boolean") { | ||
| row.set("Value", value ? "true" : "false") | ||
| } else { | ||
| row.set("Value", value) | ||
| } | ||
| result.addRow(row) | ||
| } | ||
|
|
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| return result | ||
| } | ||
|
|
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| private normalizeObjectArray(data: any, result: Result) { | ||
| for (let value of data) { | ||
| let row = result.newRow() | ||
|
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| for (let attr in value) { | ||
| var type = typeof value[attr] | ||
| if (type === "boolean") { | ||
| row.set(attr, value ? "true" : "false") | ||
| } if (type === "string" || type === "number") { | ||
| row.set(attr, value[attr] === null ? "" : value[attr]) | ||
| } | ||
| } | ||
|
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| result.addRow(row) | ||
| } | ||
|
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| return result | ||
| } | ||
|
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| private normalizeArray(data: any, result: Result) { | ||
| if ((data as Array<any>).some(value => typeof value === "object")) { | ||
| return this.normalizeObjectArray(data, result) | ||
| } | ||
|
|
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| this.normalizeScalarArray(data, result) | ||
| } | ||
|
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| private normalizeData(data: any, result: Result) { | ||
| if (Array.isArray(data)) { | ||
| this.normalizeArray(data, result) | ||
| } else if (typeof data === "object") { | ||
| this.normalizeMap(data, result) | ||
| } | ||
| } | ||
|
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| normalize(data: any): Result { | ||
| var result = new Result() | ||
|
|
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| if (this.normalizer) { | ||
| data = this.normalizer(data) | ||
| } | ||
|
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| this.normalizeData(data, result) | ||
|
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| return result | ||
| } | ||
| } |
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