Transform data into block

make-block.red

make-block: function [data /all /with selection [word! block!]][
    if word? selection [selection: to-block selection]
    either any [
        accessors: select system/catalog/accessors type?/word data 
        system/words/all [ ; NB! Modifies global "query"
            url? data 
            data: decode-url data 
            accessors: words-of data
        ]
        system/words/all [
            file? data
            accessors: [path name suffix modified]
            data: object [
                path: 
                name: none
                set [path name] split-path data
                suffix: suffix? data
                modified: system/words/query data
            ]
        ]
    ][
        either selection [
            if not empty? weird: exclude selection accessors [
                cause-error 'user 'message rejoin ["make-block: Unknown accessor" pick [": " "s: "] single? weird weird]
            ]
        ][
            selection: accessors
        ]
        collect [
            foreach sel selection [
                if all [keep to set-word! sel] 
                keep switch/default type?/word d: data/:sel [
                    word! [to-lit-word d] 
                    path! [to-lit-path d]
                ][d]
            ]
        ]
    ][
        if any [all with][
            cause-error 'user 'message rejoin ["make-block: Data of type `" mold type? data "` does not have accessors!"]
        ]
        append copy [] data
    ]
]

Usage:

make-block 3x2
;== [3 2]
make-block/all [email protected]
;== [user: "tom" host: "est.ee"]
make-block/all url: https://[email protected]?q=me
;== [scheme: 'https user-info: "tom" host: "www.est.ee" port: none path: none target: none query: "q=...
vars: [query user-info host]
;== [query user-info host]
reduce make-block/with/all url vars    ;Careful -- modifies global query
;== ["q=me" "tom" "www.est.ee"]
reduce vars
;== ["q=me" "tom" "www.est.ee"]
make-block "hi"
;== ["hi"]
to-block "hi"
;== [hi]
make-block %abc/def.red
;== [%abc/ %def.red %.red none]
make-block/all %entities.red
;== [path: %./ name: %entities.red suffix: %.red modified: 19-Dec-2018/21:08:35.815]
>> probe context make-block/all system/build/date()
make object! [
    date: 28-Feb-2024
    year: 2024
    month: 2
    day: 28
    zone: 0:00:00
    time: 21:14:45
    hour: 21
    minute: 14
    second: 45.0
    weekday: 3
    yearday: 59
    timezone: 0:00:00
    week: 9
    isoweek: 9
    julian: 59
]