mirror of
https://github.com/logos-storage/nim-datastore.git
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70 lines
1.7 KiB
Nim
70 lines
1.7 KiB
Nim
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import std/hashes
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import std/strformat
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import pkg/questionable
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import pkg/questionable/results
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import pkg/upraises
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push: {.upraises: [].}
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const
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Delimiter* = ":"
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Separator* = "/"
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type
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Namespace* = object
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field*: string
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value*: string
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func init*(T: type Namespace, field, value: string): ?!T =
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if value.contains(Delimiter):
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return failure (&"value string must not contain Delimiter '{Delimiter}'")
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.catch.expect("should not fail")
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if value.contains(Separator):
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return failure (&"value string must not contain Separator {Separator}")
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.catch.expect("should not fail")
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if field.contains(Delimiter):
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return failure (&"field string must not contain Delimiter {Delimiter}")
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.catch.expect("should not fail")
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if field.contains(Separator):
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return failure (&"field string must not contain Separator {Separator}")
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.catch.expect("should not fail")
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success T(field: field, value: value)
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func init*(T: type Namespace, id: string): ?!T =
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if id.len > 0:
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if id.contains(Separator):
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return failure (&"id string must not contain Separator {Separator}")
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.catch.expect("should not fail")
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if id.count(Delimiter) > 1:
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return failure (&"id string must not contain more than one {Delimiter}")
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.catch.expect("should not fail")
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let
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(field, value) = block:
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let parts = id.split(Delimiter)
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if parts.len > 1:
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(parts[0], parts[^1])
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else:
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("", parts[^1])
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T.init(field.strip, value.strip)
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func id*(self: Namespace): string =
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if self.field.len > 0:
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self.field & Delimiter & self.value
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else:
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self.value
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func hash*(namespace: Namespace): Hash =
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hash(namespace.id)
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func `$`*(namespace: Namespace): string =
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namespace.id
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