Oxygen Tank Delivery Backend

Oxygen Tank Delivery App Backend Template
Tank Assignments and Dispatch Coordination

Q: How do oxygen delivery teams keep availability honest when returns run late or assets go out for maintenance?

It is a backend schema and API for managing delivery sites, tank PSI levels, refill logs, emergency contact routing, and dispatch events for oxygen logistics.

Q: What is the right way to link PatientSite, TankAssignment, and RefillLog to fulfillment and return inspections?

It includes User, PatientSite, TankAssignment, RefillLog, EmergencyContact, and DispatchEvent classes, plus an ER diagram, API playground, and an AI Agent prompt.

Q: How do we add new oxygen delivery fee structures or bundles without rewriting booking logic?

Back4app provides managed database, auth, real-time queries, and flexible schema so you can ship PSI tracking, refill records, and contact workflows without running your own backend.

Q: How do I run queries for tanks and delivery sites with Flutter?

Use the TankAssignment and PatientSite classes to query and display PSI levels and delivery windows, leveraging the Back4app SDK.

Q: How do I manage emergency contact integration with Next.js server actions?

Use a server action to create a Parse Object for PatientSite or DispatchEvent with a pointer to EmergencyContact, then validate access in Cloud Code if needed.

Q: Can React Native cache tank PSI data offline?

Yes. Enable Local Datastore and pin TankAssignment and RefillLog results so drivers can review PSI levels and service history without connectivity.

Q: How do I prevent unauthorized refill edits?

In Cloud Code beforeSave for RefillLog, enforce technician access checks and reject updates that do not match the assigned workflow.

Q: What is the best way to show delivery routes on Android?

Query TankAssignment and PatientSite classes to display deliveryWindowStart, deliveryWindowEnd, status, and psiLevel, using the Back4app SDK for data management.

Q: How does the oxygen delivery flow work end-to-end?

Dispatch reviews TankAssignment records, checks psiLevel, completes the refill, writes a RefillLog with psiBefore and psiAfter, records a DispatchEvent, and escalates through EmergencyContact if the site is delayed.

Q: What classes power this oxygen tank delivery template?

The core model includes User (username, email, role, phoneNumber, active), PatientSite (siteName, addressLine1, city, region, postalCode, deliveryWindowStart, deliveryWindowEnd, primaryContact, notes), TankAssignment (tankSerialNumber, psiLevel, status, assignedSite, assignedDriver, lastCheckedAt, nextServiceDueAt), RefillLog (tankAssignment, refillTime, psiBefore, psiAfter, refilledBy, refillReason, remarks), EmergencyContact (site, contactName, relationship, phoneNumber, preferredLanguage, isPrimary), and DispatchEvent (tankAssignment, eventType, eventTime, recordedBy, locationNote).

A production-ready oxygen tank delivery backend on Back4app with User access, PatientSite deliveries, TankAssignment PSI tracking, RefillLog history, EmergencyContact lookup, and DispatchEvent tracking. Includes ER diagram, data dictionary, JSON schema, API playground, and an AI Agent prompt for rapid bootstrap.

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Key Takeaways

This template gives you an oxygen delivery backend with User roles, PatientSite delivery windows, TankAssignment PSI tracking, RefillLog history, and EmergencyContact lookup so coordinators can manage deliveries with less back-and-forth.

Tank PSI visibility — Track TankAssignment.psiLevel, status, and lastCheckedAt so dispatch teams know which oxygen tanks need attention.
Refill history you can query — Log every RefillLog entry with tankAssignment, refillTime, psiBefore, psiAfter, refillReason, and refilledBy.
Emergency contact routing — Link EmergencyContact records to a PatientSite so staff can act fast when deliveryWindowStart, deliveryWindowEnd, or access notes matter.
Dispatch and driver coordination — Use TankAssignment.assignedSite, assignedDriver, and DispatchEvent.eventType to keep routes and handoffs clear.

Understanding the Oxygen Tank Delivery App Backend

A smooth oxygen delivery checkout hides dozens of checks: eligibility, conflicts, deposits, and the handoff to fulfillment. Model the core entities on Back4app to give oxygen delivery teams a backend that can grow from a single yard to multi-site operations. The schema covers User, PatientSite, TankAssignment, RefillLog, EmergencyContact, and DispatchEvent with auth and delivery workflow controls built in. Connect your preferred frontend and ship faster.

Best for:

Oxygen tank delivery appsMedical equipment logisticsDispatch coordination toolsRefill tracking platformsEmergency contact workflowsTeams selecting BaaS for oxygen delivery products

Oxygen Delivery: backend snapshot

Mobile crews and back-office staff see different slices of reality in oxygen delivery; the product job is to stitch those slices without blame games.

Stakeholders can sanity-check user roles for dispatch and care teams, patient site delivery location management, psi tracking for each tank assignment coverage here: names, relationships, and the workflows they enable.

Delivery Module Features

Every technology card in this hub uses the same oxygen delivery backend schema with User, PatientSite, TankAssignment, RefillLog, EmergencyContact, and DispatchEvent.

User roles for dispatch and care teams

User stores username, email, role, phoneNumber, and active.

PatientSite delivery location management

PatientSite holds siteName, addressLine1, city, region, postalCode, and deliveryWindowStart/end.

PSI tracking for each TankAssignment

TankAssignment holds tankSerialNumber, psiLevel, status, assignedSite, and assignedDriver.

Refill history in RefillLog

RefillLog tracks tankAssignment, refillTime, psiBefore, psiAfter, refillReason, and refilledBy.

Dispatch events for route handoffs

DispatchEvent stores tankAssignment, eventType, eventTime, recordedBy, and locationNote.

Why Build Your Oxygen Tank Delivery Backend with Back4app?

Back4app gives you User, PatientSite, TankAssignment, RefillLog, EmergencyContact, and DispatchEvent primitives so your team can focus on safe dispatch and clear records instead of infrastructure work.

•Tank and refill tracking: TankAssignment.psiLevel, status, and RefillLog.psiBefore/psiAfter keep delivery and refill work tied to the same source of truth.
•Delivery site coordination: PatientSite.deliveryWindowStart, deliveryWindowEnd, and notes support route planning and handoff updates.
•Emergency contact integration: EmergencyContact links to a PatientSite so dispatch can reach the right person when psiLevel is below threshold.

Build and adjust oxygen delivery workflows quickly with one backend contract across all platforms.

Core Delivery Benefits

A delivery backend that helps you move faster without losing sight of PSI, refills, or contact handling.

Faster route and site setup

Start from PatientSite and TankAssignment classes instead of inventing logistics tables.

Safer PSI checks

Use TankAssignment.psiLevel, status, and nextServiceDueAt to surface low cylinders before dispatch.

Clear refill accountability

Revisit every RefillLog.psiBefore and psiAfter value when a driver or technician completes a tank refill.

Reliable emergency escalation

Connect EmergencyContact to the delivery flow so coordinators know who to reach when a PatientSite is delayed.

Dispatch event trail

Use DispatchEvent.eventType, eventTime, and recordedBy to show what happened during each handoff.

AI bootstrap workflow

Generate backend scaffolding and integration guidance fast with one structured prompt.

Ready to launch your oxygen delivery app?

Let the Back4app AI Agent scaffold your oxygen delivery backend and generate TankAssignment PSI tracking, RefillLog history, and EmergencyContact lookup from one prompt.

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Delivery Tech Stack

Everything included in this oxygen delivery backend template.

Frontend

13+ technologies

Backend

Back4app

Database

MongoDB

Auth

Built-in auth + sessions

API

REST and GraphQL

Realtime

Live Queries

Relationship Map

Entity relationship model for the oxygen delivery backend schema.

Relationship Map

View diagram source

Mermaid

erDiagram
    User ||--o{ PatientSite : "primaryContact"
    User ||--o{ TankAssignment : "assignedDriver"
    User ||--o{ RefillLog : "refilledBy"
    User ||--o{ DispatchEvent : "recordedBy"
    PatientSite ||--o{ TankAssignment : "assignedSite"
    PatientSite ||--o{ EmergencyContact : "site"
    TankAssignment ||--o{ RefillLog : "tankAssignment"
    TankAssignment ||--o{ DispatchEvent : "tankAssignment"

    User {
        String objectId PK
        String username
        String email
        String password
        String role
        String phoneNumber
        Boolean active
        Date createdAt
        Date updatedAt
    }

    PatientSite {
        String objectId PK
        String siteName
        String addressLine1
        String city
        String region
        String postalCode
        Date deliveryWindowStart
        Date deliveryWindowEnd
        String primaryContactId FK
        String notes
        Date createdAt
        Date updatedAt
    }

    TankAssignment {
        String objectId PK
        String tankSerialNumber
        Number psiLevel
        String status
        String assignedSiteId FK
        String assignedDriverId FK
        Date lastCheckedAt
        Date nextServiceDueAt
        Date createdAt
        Date updatedAt
    }

    RefillLog {
        String objectId PK
        String tankAssignmentId FK
        Date refillTime
        Number psiBefore
        Number psiAfter
        String refilledById FK
        String refillReason
        String remarks
        Date createdAt
        Date updatedAt
    }

    EmergencyContact {
        String objectId PK
        String siteId FK
        String contactName
        String relationship
        String phoneNumber
        String preferredLanguage
        Boolean isPrimary
        Date createdAt
        Date updatedAt
    }

    DispatchEvent {
        String objectId PK
        String tankAssignmentId FK
        String eventType
        Date eventTime
        String recordedById FK
        String locationNote
        Date createdAt
        Date updatedAt
    }

Dispatch Integration Flow

Typical runtime flow for auth, TankAssignment PSI review, RefillLog creation, DispatchEvent updates, and EmergencyContact lookup.

Relationship Map

View diagram source

Mermaid

sequenceDiagram
  participant User
  participant App as Oxygen Tank Delivery App
  participant Back4app as Back4app Cloud

  User->>App: Login with dispatcher or driver account
  App->>Back4app: POST /login
  Back4app-->>App: Session token

  User->>App: Load tank assignments and PSI levels
  App->>Back4app: GET /classes/TankAssignment?include=assignedSite,assignedDriver
  Back4app-->>App: TankAssignment list

  User->>App: Open a site and check refill history
  App->>Back4app: GET /classes/RefillLog?where={"tankAssignment":...}
  Back4app-->>App: RefillLog entries

  User->>App: Save a new refill log or dispatch event
  App->>Back4app: POST /classes/RefillLog
  App->>Back4app: POST /classes/DispatchEvent
  Back4app-->>App: Saved objectIds

  App->>Back4app: Live query updates for PSI changes and emergency contact changes
  Back4app-->>App: Updated TankAssignment and EmergencyContact records

Field Guide

Full field-level reference for every class in the oxygen delivery schema.

Field	Type	Description	Required
objectId	String	Auto-generated unique identifier	Auto
username	String	User login name
email	String	User email address
password	String	Hashed password (write-only)
role	String	Role in the app (e.g. dispatcher, driver, careTeam, patient)
phoneNumber	String	Primary contact phone number	—
active	Boolean	Whether the account can access the app
createdAt	Date	Auto-generated creation timestamp	Auto
updatedAt	Date	Auto-generated last-update timestamp	Auto

9 fields in User

Access and Permissions

How ACL and CLP strategy secures users, sites, tanks, refill logs, and emergency contacts.

Patient site boundaries

Only authorized staff should create or update PatientSite details, including deliveryWindowStart, deliveryWindowEnd, and notes.

Tank and refill integrity

Restrict TankAssignment updates and RefillLog creation to dispatch coordinators or drivers with verified access.

Scoped dispatch visibility

Limit DispatchEvent and EmergencyContact reads to the assigned care team, dispatcher, or driver handling that route.

JSON Schema

Raw JSON schema definition ready to copy into Back4app or use as implementation reference.

JSON

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{
  "classes": [
    {
      "className": "User",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "username": {
          "type": "String",
          "required": true
        },
        "email": {
          "type": "String",
          "required": true
        },
        "password": {
          "type": "String",
          "required": true
        },
        "role": {
          "type": "String",
          "required": true
        },
        "phoneNumber": {
          "type": "String",
          "required": false
        },
        "active": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "PatientSite",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "siteName": {
          "type": "String",
          "required": true
        },
        "addressLine1": {
          "type": "String",
          "required": true
        },
        "city": {
          "type": "String",
          "required": true
        },
        "region": {
          "type": "String",
          "required": true
        },
        "postalCode": {
          "type": "String",
          "required": true
        },
        "deliveryWindowStart": {
          "type": "Date",
          "required": false
        },
        "deliveryWindowEnd": {
          "type": "Date",
          "required": false
        },
        "primaryContact": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "notes": {
          "type": "String",
          "required": false
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "TankAssignment",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "tankSerialNumber": {
          "type": "String",
          "required": true
        },
        "psiLevel": {
          "type": "Number",
          "required": true
        },
        "status": {
          "type": "String",
          "required": true
        },
        "assignedSite": {
          "type": "Pointer",
          "required": true,
          "targetClass": "PatientSite"
        },
        "assignedDriver": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "lastCheckedAt": {
          "type": "Date",
          "required": false
        },
        "nextServiceDueAt": {
          "type": "Date",
          "required": false
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "RefillLog",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "tankAssignment": {
          "type": "Pointer",
          "required": true,
          "targetClass": "TankAssignment"
        },
        "refillTime": {
          "type": "Date",
          "required": true
        },
        "psiBefore": {
          "type": "Number",
          "required": true
        },
        "psiAfter": {
          "type": "Number",
          "required": true
        },
        "refilledBy": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "refillReason": {
          "type": "String",
          "required": true
        },
        "remarks": {
          "type": "String",
          "required": false
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "EmergencyContact",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "site": {
          "type": "Pointer",
          "required": true,
          "targetClass": "PatientSite"
        },
        "contactName": {
          "type": "String",
          "required": true
        },
        "relationship": {
          "type": "String",
          "required": true
        },
        "phoneNumber": {
          "type": "String",
          "required": true
        },
        "preferredLanguage": {
          "type": "String",
          "required": false
        },
        "isPrimary": {
          "type": "Boolean",
          "required": true
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    },
    {
      "className": "DispatchEvent",
      "fields": {
        "objectId": {
          "type": "String",
          "required": false
        },
        "tankAssignment": {
          "type": "Pointer",
          "required": true,
          "targetClass": "TankAssignment"
        },
        "eventType": {
          "type": "String",
          "required": true
        },
        "eventTime": {
          "type": "Date",
          "required": true
        },
        "recordedBy": {
          "type": "Pointer",
          "required": true,
          "targetClass": "User"
        },
        "locationNote": {
          "type": "String",
          "required": false
        },
        "createdAt": {
          "type": "Date",
          "required": false
        },
        "updatedAt": {
          "type": "Date",
          "required": false
        }
      }
    }
  ]
}

Build with AI Agent

Use the Back4app AI Agent to generate a real oxygen tank delivery app from this template, including frontend, backend, auth, and tank, refill, and emergency-contact flows.

Back4app AI Agent

Ready to build

Create an oxygen tank delivery app backend on Back4app with this exact schema and behavior.

Schema:
1. User (use Back4app built-in): username, email, password, role, phoneNumber, active; objectId, createdAt, updatedAt (system).
2. PatientSite: siteName, addressLine1, city, region, postalCode, deliveryWindowStart, deliveryWindowEnd, primaryContact (Pointer to User, required), notes; objectId, createdAt, updatedAt.
3. TankAssignment: tankSerialNumber, psiLevel, status, assignedSite (Pointer to PatientSite, required), assignedDriver (Pointer to User, required), lastCheckedAt, nextServiceDueAt; objectId, createdAt, updatedAt.
4. RefillLog: tankAssignment (Pointer to TankAssignment, required), refillTime, psiBefore, psiAfter, refilledBy (Pointer to User, required), refillReason, remarks; objectId, createdAt, updatedAt.
5. EmergencyContact: site (Pointer to PatientSite, required), contactName, relationship, phoneNumber, preferredLanguage, isPrimary; objectId, createdAt, updatedAt.
6. DispatchEvent: tankAssignment (Pointer to TankAssignment, required), eventType, eventTime, recordedBy (Pointer to User, required), locationNote; objectId, createdAt, updatedAt.

Security:
- Dispatchers can create and update TankAssignment, RefillLog, DispatchEvent, and PatientSite records.
- Drivers can update assigned TankAssignment PSI checks, create RefillLog entries, and add DispatchEvent updates for routes they handle.
- Care team users can view their PatientSite records and EmergencyContact entries, but cannot edit PSI history.
- EmergencyContact data should be visible only to authenticated users involved in the site or dispatch operation.

Auth:
- Sign-up, login, logout.

Behavior:
- Track PSI levels, store refill logs, attach emergency contacts, and record dispatch handoffs.
- Show the latest tank pressure, refill history, delivery window, and emergency contact for each site.

Deliver:
- Back4app app with schema, ACLs, CLPs; frontend for dispatch boards, driver route checks, refill logging, and emergency contact lookup.

Press the button below to open the Agent with this template prompt pre-filled.

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API Tester

Try REST and GraphQL endpoints against the oxygen delivery schema. Responses use mock data and do not require a Back4app account.

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Uses the same schema as this template.

Choose Your Technology

Expand each card to see how to integrate PatientSite, TankAssignment, and RefillLog with your chosen stack.

What You Get with Every Technology

Every stack uses the same oxygen delivery backend schema and API contracts.

Unified oxygen logistics data structure

Manage User, PatientSite, TankAssignment, RefillLog, EmergencyContact, and DispatchEvent records with one schema.

PSI tracking for delivery routes

Keep tank pressure visible so dispatch can prioritize low cylinders first.

Refill log history for technicians

Record psiBefore, psiAfter, and refillTime for each service stop.

Emergency contact routing

Tie contacts to PatientSite records so escalation is available when the route changes.

REST/GraphQL APIs for oxygen delivery

Integrate mobile, web, and operations dashboards with the same backend contract.

Extensible architecture for oxygen logistics

Add routes, inventory, or service notes later without reworking the core delivery schema.

Oxygen Delivery Stack Comparison

Compare setup speed, SDK style, and AI support across all supported technologies.

Framework	Setup Time	Oxygen Delivery Benefit	SDK Type	AI Support
Flutter	About 5 min	Single codebase for oxygen delivery on mobile and web.	Typed SDK	Full
React	Under 5 minutes	Fast web dashboard for dispatch and PSI review.	Typed SDK	Full
React Native	~3–7 min	Cross-platform mobile app for drivers and technicians.	Typed SDK	Full
Next.js	Rapid (5 min) setup	Server-rendered web app for delivery coordination.	Typed SDK	Full
JavaScript	~3–5 min	Lightweight web integration for oxygen logistics.	Typed SDK	Full
Android	About 5 min	Native Android app for route and PSI checks.	Typed SDK	Full
iOS	Under 5 minutes	Native iOS app for delivery and refill tasks.	Typed SDK	Full
Vue	~3–7 min	Reactive web UI for oxygen delivery operations.	Typed SDK	Full
Angular	Rapid (5 min) setup	Enterprise web app for dispatch and refill logs.	Typed SDK	Full
GraphQL	Under 2 min	Flexible GraphQL API for oxygen delivery data.	GraphQL API	Full
REST API	Quick (2 min) setup	REST API integration for oxygen delivery systems.	REST API	Full
PHP	~3 min	Server-side PHP backend for delivery coordination.	REST API	Full
.NET	~3–7 min	.NET backend for oxygen delivery operations.	Typed SDK	Full

Setup time reflects expected duration from project bootstrap to first TankAssignment or PatientSite query using this template schema.

Delivery Questions

Common questions about building an oxygen tank delivery backend with this template.

How do oxygen delivery teams keep availability honest when returns run late or assets go out for maintenance?

What is the right way to link PatientSite, TankAssignment, and RefillLog to fulfillment and return inspections?

How do we add new oxygen delivery fee structures or bundles without rewriting booking logic?

How do I run queries for tanks and delivery sites with Flutter?

How do I manage emergency contact integration with Next.js server actions?

Can React Native cache tank PSI data offline?

How do I prevent unauthorized refill edits?

What is the best way to show delivery routes on Android?

How does the oxygen delivery flow work end-to-end?

What classes power this oxygen tank delivery template?

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Oxygen Tank Delivery App Backend TemplateTank Assignments and Dispatch Coordination

Key Takeaways

Understanding the Oxygen Tank Delivery App Backend

Oxygen Delivery: backend snapshot

Delivery Module Features

User roles for dispatch and care teams

PatientSite delivery location management

PSI tracking for each TankAssignment

Refill history in RefillLog

Dispatch events for route handoffs

Why Build Your Oxygen Tank Delivery Backend with Back4app?

Core Delivery Benefits

Faster route and site setup

Safer PSI checks

Clear refill accountability

Reliable emergency escalation

Dispatch event trail

AI bootstrap workflow

Ready to launch your oxygen delivery app?

Delivery Tech Stack

Relationship Map

Dispatch Integration Flow

Field Guide

Access and Permissions

Patient site boundaries

Tank and refill integrity

Scoped dispatch visibility

JSON Schema

Build with AI Agent

API Tester

Choose Your Technology

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.NET Oxygen Delivery Backend

What You Get with Every Technology

Unified oxygen logistics data structure

PSI tracking for delivery routes

Refill log history for technicians

Emergency contact routing

REST/GraphQL APIs for oxygen delivery

Extensible architecture for oxygen logistics

Oxygen Delivery Stack Comparison

Delivery Questions

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Oxygen Tank Delivery App Backend Template
Tank Assignments and Dispatch Coordination