3f:null 40:["$","title",null,{"children":"Tidepool shift calculator, low tide only edition | Natalie Downe | Observable"}] 46:[] 44:{"id":"87c12e580f6434a1","slug":"tidepool-shift-calculator-v2","title":"Tidepool shift calculator, low tide only edition","thumbnail":"49e3b8e7b5c25c76853ac31b4ed41e895e2facb91573182f4e68e995d0ccb899","access_level":"public","create_time":"$D2022-01-23T22:32:47.800Z","update_time":"$D2023-08-08T19:14:13.330Z","view_time":null,"first_public_time":"$D2023-01-13T17:55:39.665Z","has_unpublished_edits":null,"fork":true,"stars":3,"starred":false,"owner":{"type":"team","id":"1d32886b94abcfc6","login":"natbat","name":"Natalie Downe","avatar_url":"https://avatars-next.observableusercontent.com/0ecb63b43e9c98af6c285bd6d84f806cc1b0f6fd4affb569898a6cdd72025242","tier":"starter_2024","bio":"Enthusiastic world explorer, digital creative, environmental technologist, citizen scientist and budding computational ecologist. KM6LCB","following":false},"version":591,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"9404a75b0bdafc87","login":"natbat","name":"Natalie Downe","avatar_url":"https://avatars-next.observableusercontent.com/0ecb63b43e9c98af6c285bd6d84f806cc1b0f6fd4affb569898a6cdd72025242","tier":null,"bio":"Enthusiastic world explorer, digital creative, environmental technologist, citizen scientist and budding computational ecologist. KM6LCB","following":false}],"members":[{"type":"individual","id":"9404a75b0bdafc87","login":"natbat","name":"Natalie Downe","avatar_url":"https://avatars-next.observableusercontent.com/0ecb63b43e9c98af6c285bd6d84f806cc1b0f6fd4affb569898a6cdd72025242","tier":null,"role":"editor"},{"type":"individual","id":"dc026342127b807b","login":"simonw","name":"Simon Willison","avatar_url":"https://avatars-next.observableusercontent.com/78a40181b372a172b86abe69479cab717df036b9cdcbaab5a197e45a76ffb4f3","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":1,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Tidepool shift calculator, low tide only edition","cells":[{"id":0,"value":"# Tidepool shift calculator, low tide only edition\n\nThis version of the calculator only considers the single lowest tide of each day (that is below the specified threshold) and then adds the \"shift buffer\" either side of that point.\n\nThe following code is released under the Apache 2 license https://github.com/natbat/pillarpointstewards/blob/main/LICENSE","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":31,"value":"## Choose options","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":587,"value":"({minTide, maxTide})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"viewof weekdayTide = Inputs.range([minTide, maxTide], {\n value: -1.0,\n step: 0.05,\n label: \"Weekday low tide (ft)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"viewof weekendTide = Inputs.range([minTide, maxTide], {\n value: 0,\n step: 0.05,\n label: \"Weekend low tide (ft)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":428,"value":"viewof superLowTide = Inputs.range([minTide, maxTide], {\n value: -1.5,\n step: 0.05,\n label: \"Super low tide (ft) must be lower than both above\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":94,"value":"viewof shiftBufferBefore = Inputs.range([0, 3], {\n value: 0.75,\n step: 0.25,\n label: \"Shift buffer before tide threshold (in hours)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":574,"value":"viewof shiftBufferAfter = Inputs.range([0, 3], {\n value: 1.5,\n step: 0.25,\n label: \"Shift buffer after tide threshold (in hours)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":284,"value":"viewof peoplePerShift = Inputs.range([1,15], {value: 2, step: 1, label: \"People per regular shift\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":407,"value":"viewof peoplePerSuperLowShift = Inputs.range([1,15], {value: 3, step: 1, label: \"People per super-low shift\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":224,"value":"viewof shiftsPerPersonPerYear = Inputs.range([1,15], {value: 3, step: 1, label: \"Shifts per person per year\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":89,"value":"viewof earliestShiftBuffer = Inputs.range([0, 3], {\n value: 1,\n step: 0.5,\n label: \"Earliest shift time buffer (choose a duration in hours after civil dawn)\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":376,"value":"viewof minimumShiftLengthMinutes = Inputs.range([0, 120], {value: 90, step: 1, label: \"Don't schedule shifts shorter than this duration (mins)\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":87,"value":"(Earliest dawn is 5:16am on 14th June and latest is 7:12am on 6th November)","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"t","database":"$undefined"},{"id":111,"value":"## Summary of shifts for the next 365 days","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":203,"value":"Given that we want:\n\n- Shifts on weekend days with tides lower than **${weekendTide} ft**\n- And shifts on weekdays with tides lower than **${weekdayTide} ft**\n\nIn the next 365 days there will be **${expandedShifts.length} shift${expandedShifts.length > 1 ? \"s\": \"\"}**
... with durations ranging between **${ minutesToHoursAndMinutes(minShiftDuration)}** and **${minutesToHoursAndMinutes(maxShiftDuration)}** due to daylight hours\n
... the total duration of all of the shifts is **${minutesToHoursAndMinutes(totalShiftMinutes)}**\n\nAssuming the following:\n\n- **${peoplePerShift}** people per regular shift\n- **${peoplePerSuperLowShift}** people per shift for tides below **${superLowTide} ft**\n- **${shiftsPerPersonPerYear}** shift${shiftsPerPersonPerYear > 1 ? \"s\": \"\"} per person per year\n\nWe would need to train **${numberOfVolunteers}** volunteers for the year.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":501,"value":"numberOfVolunteers = {\n let numPeopleShifts = expandedShifts.reduce((partialSum, s) => partialSum + s.people, 0);\n return Math.ceil(numPeopleShifts / shiftsPerPersonPerYear);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":117,"value":"## Day view of shifts","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":127,"value":"html`${expandedShifts.map(({start, end, minTideFeet, minTideTime, people}) => {\n let lowestTide = '';\n if (minTide !== Infinity) {\n lowestTide = `Lowest tide is ${minTideFeet}ft at ${minTideTime.toLocaleTimeString(\"en-US\", {timeZone: \"UTC\"})} so `;\n }\n let day = start.toISOString().split(\"T\")[0];\n return `

${start.toLocaleDateString(\"en-US\", {\n weekday: \"long\",\n year: \"numeric\",\n month: \"long\",\n day: \"numeric\",\n timeZone: \"UTC\"\n })}

Shift from ${start.toLocaleTimeString(\"en-US\", {\n timeZone: \"UTC\"\n })} to ${end.toLocaleTimeString(\"en-US\", {\n timeZone: \"UTC\"\n })} (${displayDurationInMinutes(start, end)})
${\n predictionForDate(day).innerHTML || \"\"\n }${lowestTide} the shift needs ${people} people

`;\n}).join(\"\") || \"There are no shifts, try playing with the sliders\"}`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":355,"value":"Inputs.table(expandedShifts)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":414,"value":"// These are shifts with extra information about tide height, daylight etc\nexpandedShifts = shifts.map(([start, end]) => {\n let daylights = daylight_by_day[start.toISOString().split(\"T\")[0]];\n let {minTideFeet, minTideTime} = getMinTide(start, end);\n let people = peoplePerShift;\n if (minTideFeet < superLowTide) {\n people = peoplePerSuperLowShift;\n }\n start = roundToFifteenMinutes(start);\n end = roundToFifteenMinutes(end);\n return {date: start.toLocaleDateString(\"en-US\", {\n year: \"numeric\",\n month: \"long\",\n day: \"numeric\",\n timeZone: \"UTC\"\n }), duration: Math.round((end.getTime() - start.getTime()) / 60000), minTideFeet, minTideTime, people, start, end, ...daylights}\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":550,"value":"html`

Copy and paste these ${expandedShifts.length} shifts

Note that even though these end in 000Z they are in America/Los_Angeles timezone.

\n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":121,"value":"# Code","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":27,"value":"## Global Imports","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":79,"value":"import {time} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":82,"value":"## Global Variables","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":35,"value":"stationID = 9414131 // if we change the ID here we need to also change the daylight hours calculation","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"minTide = -2 // Hardcoded maximum tide used in the range picker","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"maxTide = 8; // Hardcoded minimum tide used in the range picker","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":134,"value":"## Calculations","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":138,"value":"### Get all tide heights below the threshold that are within daylight hours","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":197,"value":"An assumption we are making is that there is a dawn and dusk each day - this wont be the case at the poles of the earth","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":181,"value":"daylight_by_day = Object.fromEntries(\n (\n await (\n await fetch(\n `https://www.rockybeaches.com/data.json?sql=${`select\n day,\n dawn,\n dusk \nfrom\n sunrise_sunset \nwhere\n place = :place \norder by\n day`}&_shape=array&place=pillar-point`\n )\n ).json()\n ).map((o) => [\n o.day,\n {\n dawn: new Date(o.day + \"T\" + o.dawn + \"Z\"),\n dusk: new Date(o.day + \"T\" + o.dusk + \"Z\")\n }\n ])\n)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":568,"value":"md`## Figure out when the low tides are\n\nSee https://github.com/natbat/pillarpointstewards/issues/63 for details of the latest version of this query.`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":158,"value":"sqlQuery = {\n return `\nwith inner as (\n select\n datetime,\n substr(datetime, 0, 11) as date,\n mllw_feet,\n lag(mllw_feet) over win as previous_mllw_feet,\n lead(mllw_feet) over win as next_mllw_feet\n from\n tide_predictions\n join sunrise_sunset on place = :sunlight_place\n and day = date(datetime)\n where\n case\n when strftime('%w', datetime) in ('0', '6') then mllw_feet < :tide_weekends\n else mllw_feet < :tide\n end\n and station_id = :station_id\n and datetime >= date()\n and time(datetime) > dawn\n and time(datetime) < dusk\n window win as (\n order by datetime\n )\n order by\n datetime\n),\nlowest_tide_per_day as (\n select\n date,\n datetime,\n mllw_feet\n from\n inner\n where\n mllw_feet <= previous_mllw_feet\n and mllw_feet <= next_mllw_feet\n)\nselect\n min(datetime) as datetime,\n mllw_feet\nfrom\n lowest_tide_per_day\ngroup by\n date\norder by\n date`;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":53,"value":"linkSuffix = `?station_id=9414131&tide=${weekdayTide}&tide_weekends=${weekendTide}&sunlight_place=pillar-point&sql=${encodeURIComponent(\n sqlQuery\n )}&_shape=array`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":584,"value":"md`https://www.rockybeaches.com/data.json${linkSuffix}`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":38,"value":"heights = (\n await fetch(\n `https://www.rockybeaches.com/data.json${linkSuffix}`\n )\n).json()\n","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":44,"value":"html`Viewable on the web in Datasette here`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":39,"value":"Inputs.table(heights)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":165,"value":"low_tides = heights.map((o) => new Date(o.datetime.replace(\" \", \"T\") + \":00Z\"))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":424,"value":"function getMinTide(start, end) {\n // Note that this can return Infinity if there are no heights\n // records between start and end - which can happen if code\n // elsewhere has truncated a shift due to time of day\n // Returns [minTide, datetime]\n let heightsBetween = heights.filter(h => {\n let dt = (new Date(h.datetime.replace(\" \", \"T\") + \":00Z\"));\n return (dt > start) && (dt < end);\n });\n heightsBetween.sort((a, b) => a.mllw_feet - b.mllw_feet);\n if (heightsBetween.length == 0) {\n return Infinity;\n }\n let minHeight = heightsBetween[0];\n return {minTideFeet: minHeight.mllw_feet, minTideTime: (new Date(minHeight.datetime.replace(\" \", \"T\") + \":00Z\"))};\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":438,"value":"getMinTide(new Date(\"2022-04-10T13:00:00Z\"), new Date(\"2022-05-20T13:00:00Z\"))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":149,"value":"### Based on the low tides, calculate shift times using the buffers","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":193,"value":"An assumption we are making is that the tide does get above the threshold","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":153,"value":"// Shifts are the chunks plus shiftBufferBefore/After hours before and after\nshifts = low_tides.map((dt) => {\n let newStart = new Date(dt.valueOf() - shiftBufferBefore * 60 * 60 * 1000);\n let newEnd = new Date(dt.valueOf() + shiftBufferAfter * 60 * 60 * 1000);\n var day = newStart.toISOString().split(\"T\")[0];\n let { dawn, dusk } = daylight_by_day[day];\n\n // add a buffer to dawn so that they dont have to start at the crack of dawn, basically making the earliest shift roughly 8am in winter and roughly 6am in summer if the buffer is 1 hour after dawn - this is defined in the user interface at the top\n let pretendDawn = new Date(dawn.valueOf() + earliestShiftBuffer * 60 * 60 * 1000);\n \n if (pretendDawn > newStart) {\n newStart = pretendDawn;\n }\n if (dusk < newEnd) {\n newEnd = dusk;\n }\n return [newStart, newEnd];\n}).filter(([start, end]) => durationInMinutes(start, end) >= minimumShiftLengthMinutes);","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":243,"value":"totalShiftMinutes = {\n let total = 0;\n shifts.forEach(([start, end]) => {\n let diff = end.getTime() - start.getTime();\n let minutes = Math.round(diff / 60000);\n total += minutes;\n });\n return total;\n}\n","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":169,"value":"### Generate display code","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":183,"value":"function displayDurationInMinutes(start, end) {\n return minutesToHoursAndMinutes(durationInMinutes(start, end));\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":393,"value":"function durationInMinutes(start, end) {\n let diff = end.getTime() - start.getTime();\n return Math.round(diff / 60000);\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":235,"value":"function minutesToHoursAndMinutes(minutes) {\n if (minutes > 60) {\n let hours = Math.floor(minutes / 60);\n let andMinutes = (minutes / 60 - hours) * 60;\n let s = hours + (hours == 1 ? \"hr\" : \"hrs\");\n if (andMinutes > 0) {\n s += \" \" + Math.round(andMinutes);\n s += andMinutes > 1 ? \"mins\" : \"min\";\n }\n return s;\n } else {\n return minutes + ' ' + (minutes > 1 ? \"mins\" : \"min\");\n }\n return minutes;\n}\n","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":172,"value":"rockyBeachesHtml = (\n await fetch(\"https://www.rockybeaches.com/us/pillar-point\")\n).text()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":174,"value":"tidePredictions = {\n let el = document.createElement(\"html\");\n el.innerHTML = rockyBeachesHtml;\n Array.from(el.querySelectorAll(\"h4,div.depth-view\")).forEach((el) =>\n el.parentNode.removeChild(el)\n );\n return Object.fromEntries(\n Array.from(el.querySelectorAll(\".full .tide-prediction\")).map((el) => [\n el.id.replace(\"tide-prediction-\", \"\"),\n el\n ])\n );\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":177,"value":"function predictionForDate(date) {\n let prediction = tidePredictions[date];\n if (!prediction) {\n return \"\";\n }\n return html`\n ${prediction.innerHTML}\n
`;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":259,"value":"minShiftDuration = Math.min(...shifts.map(([start, end])=> {\n let diff = end.getTime() - start.getTime();\n return Math.round(diff / 60000);\n}))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":270,"value":"maxShiftDuration = Math.max(...shifts.map(([start, end])=> {\n let diff = end.getTime() - start.getTime();\n return Math.round(diff / 60000);\n}))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":519,"value":"function roundToFifteenMinutes(dt) {\n let msIn15Mins = 1000 * 60 * 15;\n return new Date(Math.round(dt.getTime() / msIn15Mins) * msIn15Mins)\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":529,"value":"roundToFifteenMinutes(new Date())","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W46","stdlib":"1"}} 45:"$44:body"