@grafana/ui/dist/esm/graveyard/GraphNG/nullInsertThreshold.mjs.map

Grafana Components Library

{"version":3,"file":"nullInsertThreshold.mjs","sources":["../../../../src/graveyard/GraphNG/nullInsertThreshold.ts"],"sourcesContent":["import { DataFrame } from '@grafana/data';\n\nimport { getRefField } from './utils';\n\ntype InsertMode = (prev: number, next: number, threshold: number) => number;\n\nconst INSERT_MODES = {\n  threshold: (prev: number, next: number, threshold: number) => prev + threshold,\n  midpoint: (prev: number, next: number, threshold: number) => (prev + next) / 2,\n  // previous time + 1ms to prevent StateTimeline from forward-interpolating prior state\n  plusone: (prev: number, next: number, threshold: number) => prev + 1,\n};\n\ninterface NullInsertOptions {\n  frame: DataFrame;\n  refFieldName?: string | null;\n  refFieldPseudoMax?: number;\n  refFieldPseudoMin?: number;\n  insertMode?: InsertMode;\n}\n\n/** @deprecated */\nexport function applyNullInsertThreshold(opts: NullInsertOptions): DataFrame {\n  if (opts.frame.length === 0) {\n    return opts.frame;\n  }\n\n  let thorough = true;\n  let { frame, refFieldName, refFieldPseudoMax, refFieldPseudoMin, insertMode } = opts;\n\n  if (!insertMode) {\n    insertMode = INSERT_MODES.threshold;\n  }\n\n  const refField = getRefField(frame, refFieldName);\n\n  if (refField == null) {\n    return frame;\n  }\n\n  refField.state = {\n    ...refField.state,\n    nullThresholdApplied: true,\n  };\n\n  const thresholds = frame.fields.map((field) => field.config.custom?.insertNulls || refField.config.interval || null);\n\n  const uniqueThresholds = new Set<number>(thresholds);\n\n  uniqueThresholds.delete(null as any);\n\n  if (uniqueThresholds.size === 0) {\n    return frame;\n  }\n\n  if (uniqueThresholds.size === 1) {\n    const threshold = uniqueThresholds.values().next().value;\n\n    if (!threshold || threshold <= 0) {\n      return frame;\n    }\n\n    const refValues = refField.values;\n\n    const frameValues = frame.fields.map((field) => field.values);\n\n    const filledFieldValues = nullInsertThreshold(\n      refValues,\n      frameValues,\n      threshold,\n      refFieldPseudoMin,\n      refFieldPseudoMax,\n      insertMode,\n      thorough\n    );\n\n    if (filledFieldValues === frameValues) {\n      return frame;\n    }\n\n    return {\n      ...frame,\n      length: filledFieldValues[0].length,\n      fields: frame.fields.map((field, i) => ({\n        ...field,\n        values: filledFieldValues[i],\n      })),\n    };\n  }\n\n  // TODO: unique threshold-per-field (via overrides) is unimplemented\n  // should be done by processing each (refField + thresholdA-field1 + thresholdA-field2...)\n  // as a separate nullInsertThreshold() dataset, then re-join into single dataset via join()\n  return frame;\n}\n\nfunction nullInsertThreshold(\n  refValues: number[],\n  frameValues: any[][],\n  threshold: number,\n  refFieldPseudoMin: number | null = null,\n  // will insert a trailing null when refFieldPseudoMax > last datapoint + threshold\n  refFieldPseudoMax: number | null = null,\n  getInsertValue: InsertMode,\n  // will insert the value at every missing interval\n  thorough: boolean\n) {\n  const len = refValues.length;\n  const refValuesNew: number[] = [];\n\n  // Continuously subtract the threshold from the first data point, filling in insert values accordingly\n  if (refFieldPseudoMin != null && refFieldPseudoMin < refValues[0]) {\n    let preFillCount = Math.ceil((refValues[0] - refFieldPseudoMin) / threshold);\n    // this will be 0 or 1 threshold increment left of visible range\n    let prevSlot = refValues[0] - preFillCount * threshold;\n\n    while (prevSlot < refValues[0]) {\n      // (prevSlot - threshold) is used to simulate the previous 'real' data point, as getInsertValue expects\n      refValuesNew.push(getInsertValue(prevSlot - threshold, prevSlot, threshold));\n      prevSlot += threshold;\n    }\n  }\n\n  // Insert initial value\n  refValuesNew.push(refValues[0]);\n\n  let prevValue: number = refValues[0];\n\n  // Fill nulls when a value is greater than the threshold value\n  for (let i = 1; i < len; i++) {\n    const curValue = refValues[i];\n\n    while (curValue - prevValue > threshold) {\n      refValuesNew.push(getInsertValue(prevValue, curValue, threshold));\n\n      prevValue += threshold;\n\n      if (!thorough) {\n        break;\n      }\n    }\n\n    refValuesNew.push(curValue);\n\n    prevValue = curValue;\n  }\n\n  // At the end of the sequence\n  if (refFieldPseudoMax != null && refFieldPseudoMax > prevValue) {\n    while (prevValue + threshold < refFieldPseudoMax) {\n      refValuesNew.push(getInsertValue(prevValue, refFieldPseudoMax, threshold));\n      prevValue += threshold;\n    }\n  }\n\n  const filledLen = refValuesNew.length;\n\n  if (filledLen === len) {\n    return frameValues;\n  }\n\n  const filledFieldValues: any[][] = [];\n\n  for (let fieldValues of frameValues) {\n    let filledValues;\n\n    if (fieldValues !== refValues) {\n      filledValues = Array(filledLen);\n\n      for (let i = 0, j = 0; i < filledLen; i++) {\n        filledValues[i] = refValues[j] === refValuesNew[i] ? fieldValues[j++] : null;\n      }\n    } else {\n      filledValues = refValuesNew;\n    }\n\n    filledFieldValues.push(filledValues);\n  }\n\n  return 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