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# ParamDB # ParamDB
ParamDB is a key-value store that is time-aware. Multiple values can be assigned to each
key with unique validity ranges. It can be used to feed static information that varies
with time to templates or to serve news.
## Introduction
There are situations where you need data to slap into a template, and the data may vary
over time.
* Sending alert e-mails including contact information for the curent support techs.
* Seasonal greetings in automatically generated content.
ParamDB solves this problem by serving collections of keys over HTTP. A collection can
contain any number of keys, and a key can contain any number of values.
## Features
* Values are serialized, so arrays and objects can be stored and restored. * Values are serialized, so arrays and objects can be stored and restored.
* Not intended to be running as a public service, so there is no authentication, for now. * Not intended to be running as a public service, so there is no authentication, for now.
* Last value that matches is returned. * Last value that matches is returned.
* Unique index on collection+name+validity.
## Future ### Future
* Metadata; store with key "meta" in value set post call, returned under a "meta" key in the * Metadata; store with key "meta" in value set post call, returned under a "meta" key in the
result list. result list.
@ -18,15 +34,17 @@
POST /businessinfo POST /businessinfo
Content-Type: application/json Content-Type: application/json
{ [
"openhours": { {
"value": "Mo-Fr 09-17, Sa-Su 12-02", "openhours": {
"valid": { "value": "Mo-Fr 09-17, Sa-Su 12-02",
"from": "2024-10-01 00:00:00 +02:00", "valid": {
"until": "2024-10-07 23:59:59 +02:00" "from": "2024-10-01 00:00:00 +02:00",
"until": "2024-10-07 23:59:59 +02:00"
}
} }
} }
} ]
``` ```
### Retrieve current values ### Retrieve current values
@ -49,19 +67,17 @@ Query params:
GET /businessinfo/all GET /businessinfo/all
{ {
"keys": { "openhours": [
"openhours": [ {
{ "id": 13,
"id": 13, "value": "Mo-Fr 09-17, Sa-Su 10-01"
"value": "Mo-Fr 09-17, Sa-Su 10-01" },
}, {
{ "id": 19,
"id": 19, "value": "Mo-Fr 09-17, Sa-Su 12-02",
"value": "Mo-Fr 09-17, Sa-Su 12-02", "valid": {
"valid": { "from": "2024-10-01 00:00:00 +02:00",
"from": "2024-10-01 00:00:00 +02:00", "until": "2024-10-07 23:59:59 +02:00"
"until": "2024-10-07 23:59:59 +02:00"
}
} }
] ]
} }

15
src/Daemon.php
View File

@ -95,6 +95,14 @@ class Daemon
private function opCollectionSet(ServerRequestInterface $request, string $collectionName): void private function opCollectionSet(ServerRequestInterface $request, string $collectionName): void
{ {
try {
$collection = $this->db->getCollection($collectionName);
}
catch (\Throwable $t) {
$collection = $this->db->createCollection($collectionName);
}
$body = (array)json_decode($request->getBody()->getContents()); $body = (array)json_decode($request->getBody()->getContents());
foreach ($body as $change) { foreach ($body as $change) {
@ -105,13 +113,6 @@ class Daemon
$validFrom = isset($change->validity->from) ? new DateTime($change->validity->from) : null; $validFrom = isset($change->validity->from) ? new DateTime($change->validity->from) : null;
$validUntil = isset($change->validity->until) ? new DateTime($change->validity->until) : null; $validUntil = isset($change->validity->until) ? new DateTime($change->validity->until) : null;
try {
$collection = $this->db->getCollection($collectionName);
}
catch (\Throwable $t) {
$collection = $this->db->createCollection($collectionName);
}
$collection->setValue($name, $value, $validFrom, $validUntil, $id); $collection->setValue($name, $value, $validFrom, $validUntil, $id);
} }
} }