Move the active line of the active file to a chosen file.

obsidian.templater.move-line.js

<%*
//v1.6.2: Fix with update to Templater where wasn't removing the selected text/line "on move"

//'first' will add to top of file. 'last' will add to bottom of file
let firstOrLastLine = 'last';

//Choose a specific line to move to underneath; overrules firstOrLastLine if true
const bChooseLine = false;

//After moving the line, open the file it was moved to
const bOpenFile = false;

//"move" = default, "copy" = duplicate, "embed" = move and leave a block ref link, "blockRef" = create block ref and add an embed link in other file
const moveMode = "move";

const moveToFile = await tp.system.suggester((item) => item.path, this.app.vault.getMarkdownFiles(), false);
if(moveToFile) {
    let cmEditorAct = this.app.workspace.activeLeaf.view.editor;
    if(tp.file.selection() == '') {
        const curLine = cmEditorAct.getCursor().line;
        cmEditorAct.setSelection({ line: curLine, ch: 0 }, { line: curLine, ch: 9999 });
    }
    let selectedText = tp.file.selection();
    tR = selectedText;
    const curContent = await this.app.vault.read(moveToFile);
    let newContents;
    let selectLine;
    if(moveMode == "blockRef" || moveMode == "embed") {
        function createBlockHash() {
            let result = '';
            var characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
            var charactersLength = characters.length;
            for ( var i = 0; i < 7; i++ ) {
                result += characters.charAt(Math.floor(Math.random() * charactersLength));
            }
            return result;
        }
        let id = createBlockHash();
        let blockRef;
        if(moveMode == "blockRef") {
            blockRef = `![[${tp.file.title}#^${id}]]`.split("\n").join("");
            tR = tp.file.selection() + ` ^${id}`.split("\n").join("");
            selectedText = blockRef;
        } else {
            blockRef = `![[${moveToFile.basename}#^${id}]]`.split("\n").join("");
            tR = blockRef;
            selectedText = '\n' + tp.file.selection() + ` ^${id}`.split("\n").join("") + '\n';
        }
        navigator.clipboard.writeText(blockRef).then(text => text);
    }
    if(bChooseLine) {
        const arrayEachLine = curContent.split('\n');
        let arrayStrings = ['--End of File--', '--Beginning of File--'];
        let arrayValues = ['last_', 'first_'];
        arrayEachLine.forEach(eachItem => {
            if(eachItem != '') {
                arrayStrings.push(eachItem.slice(0,250));
                arrayValues.push(eachItem);
            }
        });
        selectLine = await tp.system.suggester(arrayStrings, arrayValues, false);
        if(selectLine == 'last_' || selectLine == 'first_') {
            if(selectLine == 'first_'){
                firstOrLastLine = 'first';
                newContents = selectedText + '\n' + curContent;
            } else {
                firstOrLastLine = 'last';
                newContents = curContent + '\n' + selectedText;
            }
        } else {
            if(curContent.contains('\n' + selectLine + '\n')) {
                newContents = curContent.replace('\n' + selectLine + '\n', '\n' + selectLine + '\n' + selectedText + '\n');
            } else if(curContent.startsWith(selectLine + '\n')) {
                newContents = curContent.replace(selectLine + '\n', selectLine + '\n' + selectedText + '\n');
            } else {
                firstOrLastLine = 'last';
                newContents = curContent + '\n' + selectedText;
            }
        }
    } else {
        if(firstOrLastLine == 'first'){
            newContents = selectedText + '\n' + curContent
        }
        else {
            newContents = curContent + '\n' + selectedText
        }
    }
    if(bChooseLine == false || selectLine) {
        await this.app.vault.modify(moveToFile, newContents);
        if(bOpenFile) {
            await this.app.workspace.openLinkText(moveToFile.basename, moveToFile.path, true);
            if(bChooseLine == false || selectLine == 'last_' || selectLine == 'first_') {
                cmEditorAct = this.app.workspace.activeLeaf.view.editor;
                if(firstOrLastLine == 'first'){
                    cmEditorAct.setSelection({ line: 0, ch: 0 }, { line: 0, ch: 9999 });
                }
                else {
                    cmEditorAct.setSelection({ line: cmEditorAct.lastLine(), ch: 0 }, { line: cmEditorAct.lastLine(), ch: 9999 });
                }
            }
        }
        if(moveMode == "move") {
            cmEditorAct.replaceSelection('');
            tR = '';
        } else if(moveMode == "copy") {
            tR = selectedText;
        }
    }
}
%>

Demo: https://user-images.githubusercontent.com/64155612/116369617-6ed4d980-a7be-11eb-839a-24ed9bd596b0.mp4

Update 1.1: https://gist.github.com/GitMurf/fc4132acd805b9c1413ab84c6bd11576/revisions#diff-239087db550bb609844f862d57fd3856d01b7b86f0bc21154c031d5d2444f338R8

Choose which line to move to in the selected file. Must set the bChooseLine boolean to true.

Demo: https://user-images.githubusercontent.com/64155612/116388246-78ffd380-a7d0-11eb-8e24-e10deaa83041.mp4

Update v1.6: https://gist.github.com/GitMurf/fc4132acd805b9c1413ab84c6bd11576/revisions?diff=unified#diff-239087db550bb609844f862d57fd3856d01b7b86f0bc21154c031d5d2444f338R2

Demo: https://user-images.githubusercontent.com/64155612/116498977-e575e380-a85f-11eb-9333-14b16cf18982.mp4

Change the const moveMode = "move"; to your choice. I recommend making multiple templates with the same code and then just changing this variable for the different "modes" outlined below.

Now can do the following:

• Move multi-lines if you select them before running script
• "Copy" instead of "move"
• Move but leave a block ref embed link behind in original location pointing to new location
• Leave in current location and create block ref and then choose where to copy a block ref embed link to in another file

Awesome. Thanks a lot for sharing it.
I have added a prompt for 3 use cases of move and open the file, copy alone and "copy open the file".
In case any one needs

const moveOrCopy = await tp.system.prompt(" LEAVE EMPTY TO MOVE,0 = MOVE and OPEN,1 = COPY, 2 = COPY AND OPEN");
const moveToFile = await tp.system.suggester((item) => item.path, this.app.vault.getMarkdownFiles(), false);

if(moveOrCopy == 2 || moveOrCopy == 0){
bOpenFile = true;
}
if(moveOrCopy == 2 || moveOrCopy == 1){
moveMode = "copy";
}

Thank you for this.

I made a fix that, in case of first line but the objective MD document has some yaml metadata, it will be inserted just below the yaml metadata:

const yamlRegexp = /^---$/gm;
const yamlVariables = [...curContent.matchAll(yamlRegexp)];

if (yamlVariables.length > 1) {
    const position = yamlVariables[1].index+4
    newContents = [curContent.slice(0, position), selectedText, '\n', curContent.slice(position)].join("")
} else {
    newContents = selectedText + '\n' + curContent;
}

I added it in the two lines where we were doing newContents = selectedText + '\n' + curContent;