BFB goext library

A collection of general & useful library methods

This should not have any heavy dependencies (gin, mongo, etc) and add missing basic language features...

Potentially needs export GOPRIVATE="gogs.mikescher.com"

Packages:

Name	Maintainer	Description
langext	Mike	General uttility/helper functions, (everything thats missing from go standard library)
mathext	Mike	Utility/Helper functions for math
cryptext	Mike	Utility/Helper functions for encryption
syncext	Mike	Utility/Helper funtions for multi-threading / mutex / channels
dataext	Mike	Various useful data structures
zipext	Mike	Utility for zip/gzip/tar etc
reflectext	Mike	Utility for golang reflection
fsext	Mike	Utility for filesytem access
ctxext	Mike	Utility for context.Context
mongoext	Mike	Utility/Helper functions for mongodb (kinda abandoned)
cursortoken	Mike	MongoDB cursortoken implementation
pagination	Mike	Pagination implementation
totpext	Mike	Implementation of TOTP (2-Factor-Auth)
termext	Mike	Utilities for terminals (mostly color output)
confext	Mike	Parses environment configuration into structs
cmdext	Mike	Runner for external commands/processes
sq	Mike	Utility functions for sql based databases (primarily sqlite)
tst	Mike	Utility functions for unit tests
rfctime	Mike	Classes for time seriallization, with different marshallign method for mongo and json
gojson	Mike	Same interface for marshalling/unmarshalling as go/json, except with proper serialization of null arrays/maps
bfcodegen	Mike	Various codegen tools (run via go generate)
rext	Mike	Regex Wrapper, wraps regexp with a better interface
wmo	Mike	Mongo Wrapper, wraps mongodb with a better interface
scn	Mike	SimpleCloudNotifier

Usage:

exerr

• see mongoext/builder.go for full info

Short summary:

• An better error package with metadata, listener, api-output and error-traces
• Initialize with exerr.Init()
• Never return err direct, always use exerr.Wrap(err, "...") - add metadata where applicable
• at the end either Print(), Fatal() or Output() your error (print = stdout, fatal = panic, output = json API response)
• You can add listeners with exerr.RegisterListener(), and save the full errors to a db or smth

wmo

• A typed wrapper around the official mongo-go-driver
• Use wmo.W[...](...) to wrap the collections and type-ify them
• The new collections have all the usual methods, but types
• Also they have List() and Paginate() methods for paginated listings (witehr with a cursortoken or page/limit)
• Register additional hooks with WithDecodeFunc, WithUnmarshalHook, WithMarshalHook, WithModifyingPipeline, WithModifyingPipelineFunc
• List(), Paginate(), etc support filter interfaces
  • Rule(s) of thumb:
    • filter the results in the filter interface
    • sort the results in the sort function of the filter interface
    • add joins ($lookup's) in the WithModifyingPipelineFunc/WithModifyingPipeline

ginext

• A wrapper around gin-gonic/gin
• create the gin engine with ginext.NewEngine
• Add routes with engine.Routes()...
  • .Use(..) adds a middleware
  • .Group(..) adds a group
  • .Get().Handle(..) adds a handler
• Handler return values (in contract to ginext) - values implement the ginext.HTTPResponse interface
• Every handler starts with something like:

func (handler Handler) CommunityMetricsValues(pctx ginext.PreContext) ginext.HTTPResponse {
    type communityURI struct {
        Version     string             `uri:"version"`
        CommunityID models.CommunityID `uri:"cid"`
    }
    type body struct {
        UserID  models.UserID  `json:"userID"`
        EventID models.EventID `json:"eventID"`
    }

    var u uri
    var b body
    ctx, gctx, httpErr := pctx.URI(&u).Body(&b).Start() // can have more unmarshaller, like header, form, etc
    if httpErr != nil {
    	return *httpErr
    }
    defer ctx.Cancel()

    // do stuff
}

sq

• TODO (like mongoext for sqlite/sql databases)