Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { isPresent } from "../clientUtils/isPresent"
import { GitCommit, SerializedGridProgram } from "../clientUtils/owidTypes"
import { GridCell } from "./GridCell"
import {
CellDef,
CellPosition,
GRID_CELL_DELIMITER,
GRID_EDGE_DELIMITER,
GRID_NODE_DELIMITER,
Origin,
ParsedCell,
} from "./GridLangConstants"
/**
* Block location for the below would be like (numRows = 2)
* table |
* slug name | startRow = 1
* pop Population | endRow = 2
*/
interface BlockLocation {
startRow: number
endRow: number
numRows: number
}
export class GridProgram {
constructor(
slug: string,
tsv: string,
lastCommit?: GitCommit,
grammar?: CellDef
) {
this.lines = tsv.replace(/\r/g, "").split(this.nodeDelimiter)
this.slug = slug
this.lastCommit = lastCommit
this.grammar = grammar
}
private grammar?
private static guids = 0
guid = ++GridProgram.guids
lastCommit?: GitCommit
slug: string
private nodeDelimiter = GRID_NODE_DELIMITER
cellDelimiter = GRID_CELL_DELIMITER
private edgeDelimiter = GRID_EDGE_DELIMITER
lines: string[]
toJson(): SerializedGridProgram {
return {
program: this.toString(),
slug: this.slug,
lastCommit: this.lastCommit,
}
}
findNext(position: CellPosition) {
const cell = this.getCell(position)
const { contents } = cell
return this.grepFirst(contents, {
...position,
column: position.column + 1,
})
}
findAll(position: CellPosition) {
const cell = this.getCell(position)
const { contents } = cell
return this.grep(contents, {
...position,
column: position.column + 1,
})
}
private ring(position: CellPosition) {
const matrix = this.asArrays
const numRows = matrix.length
if (!numRows) return (function* generator() {})()
const pointer = {
...position,
started: false,
endRow: position.row,
endCol: position.column,
}
if (pointer.row >= numRows) pointer.endRow = numRows - 1
const lastLine = matrix[pointer.endRow]
pointer.endCol =
lastLine[pointer.endCol] === undefined
? lastLine.length
: pointer.endCol
function* generator() {
while (true) {
if (
pointer.started &&
pointer.row === pointer.endRow &&
pointer.column === pointer.endCol
)
return
pointer.started = true
if (
matrix[pointer.row] === undefined ||
matrix[pointer.row][pointer.column] === undefined
) {
pointer.row++
pointer.column = 0
if (pointer.row >= numRows) pointer.row = 0
continue
}
yield {
row: pointer.row,
column: pointer.column,
} as CellPosition
pointer.column++
}
}
return generator()
}
valuesFrom(position = Origin) {
return Array.from(this.ring(position)).map((next) =>
this.getCellContents(next)
)
}
get numRows() {
return this.lines.length
}
patch(obj: any) {
Object.keys(obj).forEach((key) => this.setLineValue(key, obj[key]))
return this
}
grepFirst(key: string, position = Origin) {
for (const next of this.ring(position)) {
if (this.getCellContents(next) === key) return next
}
return undefined
}
grep(key: string, position = Origin) {
const hits: CellPosition[] = []
for (const next of this.ring(position)) {
if (this.getCellContents(next) === key) hits.push(next)
}
return hits
}
/**
* Returns all non-blocks as an object literal
*/
get tuplesObject() {
const obj: { [key: string]: any } = {}
this.lines
.filter((line) => !line.startsWith(this.edgeDelimiter))
.forEach((line) => {
const words = line.split(this.cellDelimiter)
const key = words.shift()
if (key) obj[key.trim()] = words.join(this.cellDelimiter).trim()
})
return obj
}
getLine(keyword: string) {
return this.lines.find((line) =>
line.startsWith(keyword + this.cellDelimiter)
)
}
getLineValue(keyword: string) {
const line = this.getLine(keyword)
return line ? line.split(this.cellDelimiter)[1] : undefined
}
protected getBlockLocation(blockRowNumber: number): BlockLocation {
const startRow = blockRowNumber + 1
let numRows = this.lines
.slice(startRow)
.findIndex((line) => line && !line.startsWith(this.edgeDelimiter))
if (numRows === -1) numRows = this.lines.slice(startRow).length
return { startRow, endRow: startRow + numRows, numRows }
}
protected getKeywordIndex(key: string) {
return this.lines.findIndex(
(line) => line.startsWith(key + this.cellDelimiter) || line === key
)
}
getCell(position: CellPosition): ParsedCell {
return new GridCell(this.matrix, position, this.grammar!)
}
getCellContents(position: CellPosition) {
const line = this.matrix[position.row]
return line ? line[position.column] : undefined
}
@imemo private get matrix() {
return this.lines.map((line) => line.split(this.cellDelimiter))
}
deleteBlock(row?: number) {
if (row === undefined) return this
const location = this.getBlockLocation(row)
if (!location) return this
this.lines.splice(location.startRow, location.numRows)
return this
}
deleteLine(row?: number) {
if (row === undefined) return this
this.lines.splice(row, 1)
return this
}
appendLine(line: string) {
this.lines.push(line)
return this
}
// todo: make immutable and return a new copy
setCell(row: number, col: number, value: string) {
const line = this.lines[row]
const words = line.split(this.cellDelimiter)
words[col] = value
this.lines[row] = words.join(this.cellDelimiter)
return this
}
setLineValue(key: string, value: string | undefined) {
const index = this.getKeywordIndex(key)
const newLine = `${key}${this.cellDelimiter}${value}`
if (index === -1 && value !== undefined) this.lines.push(newLine)
else if (value === undefined) this.deleteLine(index)
else this.lines[index] = newLine
return this
}
getBlock(keywordIndex: number) {
const location = this.getBlockLocation(keywordIndex)
return this.lines
.slice(location.startRow, location.endRow)
.map((line) => line.substr(1))
.join(this.nodeDelimiter)
}
updateBlock(rowNumber: number, value: string) {
const location = this.getBlockLocation(rowNumber)
this.lines.splice(
location.startRow,
location.numRows,
...value
.split(this.nodeDelimiter)
.map((line) => this.edgeDelimiter + line)
)
return this
}
protected appendBlock(key: string, value: string) {
this.lines.push(key)
value
.split(this.nodeDelimiter)
.forEach((line) => this.lines.push(this.edgeDelimiter + line))
}
getRowNumbersStartingWith(startsWith: string) {
return this.lines
.map((line, index) =>
line.startsWith(startsWith + this.cellDelimiter) ||
line === startsWith
? index
: null
)
.filter(isPresent)
}
private static lineMatchesWords = (
line: string[],
words: (string | undefined)[]
): boolean =>
words.every((word, index) => word === undefined || line[index] === word)
getRowMatchingWords(...words: (string | undefined)[]): number {
return this.asArrays.findIndex((line) =>
GridProgram.lineMatchesWords(line, words)
)
}
getAllRowsMatchingWords(...words: (string | undefined)[]): number[] {
const rows: number[] = []
this.asArrays.forEach((line: string[], rowIndex: number) => {
if (GridProgram.lineMatchesWords(line, words)) rows.push(rowIndex)
})
return rows
}
get asArrays(): string[][] {
return this.lines.map((line) => line.split(this.cellDelimiter))
}
// The max number of columns in any row when you view a program as a spreadsheet
get width() {
return Math.max(...this.asArrays.map((arr) => arr.length))
}
toString() {
return this.prettify()
}
protected prettify() {
return trimMatrix(this.asArrays)
.map((line) => line.join(this.cellDelimiter))
.join(this.nodeDelimiter)
}
}
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